#js nested object filter | Explore Tumblr posts and blogs

holytheoristtastemaker · 5 years ago

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A nice list of HTML, CSS and JavaScript How Tos with basic concepts for everyday use. Feel free to comment your own approaches :)

Disabling everything with CSS

CSS

.disabled { filter: grayscale(1); pointer-events: none; }

View on JSFiddle here.

Split an array into chunks without mutability

const array = [1, 2, 3, 4] const size = 3 const new_array = array.reduce((acc, a, i) => { i % size ? acc[parseInt(i / size)].push(a) : acc.push([a]) return acc }, [])

or even shorter:

const new_array = array.reduce((acc, a, i) => i % size ? acc : [...acc, array.slice(i, i + size)], [])

Remember, start using const, if you need to change its value then use let and avoid as much as possible var. View on JSFiddle here.

Saving and loading dates

Save your datetime always in UTC ISO and load it to the user interface using local ISO. Use native widgets to avoid facing date format preferences (middle endian, little endian, etc) HTML

$button_save.onclick = () => localStorage.setItem('datetime', $input.value && new Date($input.value).toISOString()) $button_load.onclick = () => $input.value = localStorage.getItem('datetime') && toLocalISOString(new Date(localStorage.getItem('datetime'))) .slice(0, -8) function toLocalISOString(d) { const offset = d.getTimezoneOffset() return new Date( d.getFullYear(), d.getMonth(), d.getDate(), d.getHours(), d.getMinutes() - offset, d.getSeconds(), d.getMilliseconds()).toISOString() }

View on JSFiddle here. I recommend using sessionStorage and localStorage. Do not abuse cookies if they are not strictly necessary. If you need more local storage you can use IndexedDB.

Select HTML table columns by clicking on the headers

document.querySelectorAll('th').forEach($th => $th.onclick = event => { document.querySelectorAll(`td:nth-of-type(${event.currentTarget .cellIndex + 1})`) .forEach($td => $td.classList.toggle('selected')) })

Remember, onclick always overwrites the previous function (in case there was any), use addEventListener() for multiple functions. View on JSFiddle here.

Rename when destructuring

We are going to rename time property while sorting our array of objects. JS

let times = [ {name:'dog', time: '10:23'}, {name: 'laundry', time: '09:34'}, {name: 'work', time: '11:00'}] times.sort(({ time: a }, { time: b }) => a < b ? -1 : a > b ? 1 : 0)

Remember, sort() changes the orginal array. View on JSFiddle here.

Autocomplete dropdown

Have you ever used autocomplete dropdowns from jQuery UI or Bootstrap third party options? A complete heavyweight mess. Luckly, we got a couple of years ago an awaited solution: Native HTML5 Autocomplete dropdown with datalist. A lightweight standard supported in all devices. HTML

View on JSFiddle here. Save your tooling time and dependency, use as few libraries and frameworks as possible!

Real easy responsiveness with CSS Grid

CSS Grid is the easiest, cleanest and powerful way to deal with responsiveness, a completely new approach baked in the last years and ready to use. CSS Grid changes how you used to layout your documents, instead of divitis (plenty of divs) and JavaScript to change div positions depending on screens (what Bootstrap does nowadays), you can use pure CSS grid layouts with just the meaningful divs and independently of document source order. You don’t need to touch HTML or JavaScript, you don’t need Bootstrap or even complex CSS rules, what you see in your CSS is what you get on your screen. HTML

<div class="grid"> <div class="name">Name</div> <div class="score">Score</div> <div class="skills">Skills</div> <div class="chart">Chart</div> </div>

CSS

.grid { display: grid; grid-template-areas: "name" "score" "skills" "chart"; } @media only screen and (min-width: 500px) { .grid { grid-template-areas: "name skills" "score skills" "chart chart"; } } .name { grid-area: name; } .score { grid-area: score; } .skills { grid-area: skills; } .chart { grid-area: chart; }

View on JSFiddle here. I would recommend you to do these examples. Fall in love with Grid Templates like I did ❤

Move parts of the user interface without loss of interaction

HTML

<ul> <li> <button id="up">Up</button> <button id="down">Down</button> </li> <li>Nothing</li> <li>Nothing</li> </ul>

document.querySelector('#up').onclick = e => { const $li = e.target.parentElement if ($li.previousElementSibling) $li.parentElement.insertBefore($li, $li.previousElementSibling) } document.querySelector('#down').onclick = e => { const $li = e.target.parentElement if ($li.nextElementSibling) $li.parentElement.insertBefore($li.nextElementSibling, $li) }

Remember, target is what triggers the event and currentTarget is what you assigned your listener to. View on JSFiddle here.

HTML input time with 24 hours format

Rely on native HTML widgets without depending on third party libraries. However, sometimes there are some limitations, if you have ever dealt with an HTML input time you know what it is about, try to set up maximum or minimum hours/minutes and/or change from 12 hours format to 24 hours and viceversa. By now, a good solution to avoid headaches is to use 2 inputs of the type number and a pinch of JS. HTML

CSS

div { background-color: white; display: inline-flex; border: 1px solid #ccc; color: #555; } input { border: none; color: #555; text-align: center; width: 60px; }

document.querySelectorAll('input[type=number]') .forEach(e => e.oninput = () => { if (e.value.length >= 2) e.value = e.value.slice(0, 2) if (e.value.length == 1) e.value = '0' + e.value if (!e.value) e.value = '00' })

Remember, == double comparation for equality and === triple one for equality and type. If you want to check whether a variable is undefined or not, simple use triple compartion a === undefined and the same for null. If you want to check whether it exists or not use typeof a != 'undefined'. View on JSFiddle here.

Loop n times without mutable variables

[...Array(10).keys()] .reduce((sum, e) => sum + `<li>${e}</li>`, '')

also like this:

[...Array(10)] .reduce((sum, _, i) => sum + `<li>${i}</li>`, '')

View on JSFiddle here.

Horizontal and vertical center

Forget about any complicated way, just use Flexbox and set up horizontal center and vertical center in the container. CSS

body { position: absolute; top: 0; right: 0; bottom: 0; left: 0; display: flex; justify-content: center; align-items: center; } div { background-color: #555; width: 100px; height: 100px; }

View on JSFiddle here.

Asynchronous fetch

Using fetch() with asyncronous functions. JS

async function async_fetch(url) { let response = await fetch(url) return await response.json() } async_fetch(‘https://httpbin.org/ip') .then(data => console.log(data)) .catch(error => console.log('Fetch error: ' + error))

View on JSFiddle here. Note, as you have noticed I don’t write the ; semicolon, that’s perfectly fine, in JavaScript the ; is not mandatory, it doesn’t matter if you write it or not, the JS engine is going to check it and insert it if needed, just be careful with new lines that start with ( parentesis and avoid return with the value in a diferent line.

Footer with right and left buttons

HTML

<footer> <div> <button>Button A</button> <button>Button B</Button> </div> <div> <button>Button C</button> <button>Button D</button> </div> </footer>

CSS

footer { display: flex; justify-content: space-between; position: fixed; bottom: 0; left: 0; right: 0; }

View on JSFiddle here.

Scroll into view

I have created n boxes (divs) with random colors to select one of them randomly and make it visible on the viewport. Every time you rerun the code you will see in your screen the selected box regardless of its position. JS

document.querySelector(`div:nth-child(${random})`).scrollIntoView()

View on JSFiddle here.

Flattening arrays of objects

array = alphas.map(a => a.gammas.map(g => g.betas) ).join()

If you want to see other different approaches using forEach with concat and with push check this link (I did also some time consuming test using jsPerf). View on JSFiddle here. Remember, in case you want to flat arrays of arrays you can do it easily with flat().

[1, 2, [3, 4, [5, 6]]].flat(Infinity)

Nesting arrays of objects

Returns an array of n elements filled with content: JS

let get_array = (n, content) => Array(n).fill(content)

Returns an object with a name property that has a content value:

let get_object = (name, content) => Object.defineProperty({}, name, {value: content})

3 levels of arrays with objects (nested)

a = get_array(3, get_object('b', get_array(6, get_object('c', get_array(3, {}) )) ))

View on JSFiddle here.

Array without duplicate values

const array = [1, 2, 3, 3, 3, 2, 1]

The Set strategy:

[...new Set(array)]

The filter strategy (easier to figure out but slower):

array.filter((elem, index) => index == array.indexOf(elem))

View on JSFiddle here. Remember, Array.from(iterableObj) = [...iterableObj]

HTML input with units

HTML

CSS

span { background: white; border: 1px solid #e8e8e8; } input { background: inherit; outline: none; border: none; padding: 0 5px; }

View on JSFiddle here.

Responsive background loop video

HTML

CSS

video.landscape { width: 100vw; height: auto; } video { width: auto; height: 100vh; }

Remember, you can add as many sources as you want to support different video formats. View on JSFiddle here.

How to print specific HTML content

If you want to print a specific HTML content, for example everything inside a div tag or a tag element with a particular identifier, you can use window.print() in a new window with just the content you want to. It’s easy but tricky, we would like an accessible print method for any HTML element but there aren’t. Don’t forget to add/link some CSS in your new window otherwise you will get the default style from your browser. JS, HTML, CSS

function print(content) { let win = window.open() win.document.write(` <html><head> <title>Report</title> <style> div { display: inline-flex; width: 200px; height: 200px; justify-content: center; align-items: center; background-color: #e9a9c7; color: #39464e; } </style> </head><body>` ) win.document.write(content) win.document.write('</body></html>') win.print() win.close() }

View on JSFiddle here. Note, the write method is synchronous, however sometimes window tries to print before write has finished, it happens only in some browsers ¬¬, therefore trying to avoid this we have added a setTimeout(). Yeah, no quite elegant but among all the different ways, it is the shortest that works across all updated browsers so far.

View, hide, type and generate password

Love to make things as simple as possible xD A hint just inside the input, then a button to show the password and finally another button to generate random passwords. HTML

View or hide password: JS

$view_password.addEventListener('click', e => { e.currentTarget.classList.toggle('view') if (e.currentTarget.className.includes('view')) $password.setAttribute('type', 'text') else $password.setAttribute('type', 'password') })

Set a random password and make sure it’s shown:

$generate_password.addEventListener('click', () => { $view_password.classList.add('view') $password.setAttribute('type', 'text') $password.value = Math.random().toString(36).slice(-8) })

View on JSFiddle here. Note, I personally name selector’s const starting with a $.

Infinite previous and next selection

Select each element in a selection loop. If you go forward as soon as you finish the list of elements you will start selecting from the beginning and the same if you go in opposite direction. HTML

<button id="previous">Previous</button> <button id="next">Next</button> <ul> <li></li> <li class="selected"></li> <li></li> <li></li> <li></li> </ul>

document.querySelector('#next').addEventListener('click', () => { const $selected = document.querySelector('.selected') const $next_element = $selected.nextElementSibling if (!$next_element) $next_element = $selected.parentElement.firstElementChild $selected.classList.remove('selected') $next_element.classList.add('selected') })

Remember, use nextElementSibling and previousElementSibling (DOM elements) instead of nextSibling and previousSibling (DOM objects). A DOM Object can be anything: comments, insolated text, line breaks, etc. In our example nextSibling would have worked if we had set all our HTML elements together without anything between then:

View on JSFiddle here.

Responsive square

I have seen many weird ways to create responsive squares, that’s why I would like to share an easy one. Go to the JSFiddle link below and play resizing the result window. CSS

div { width: 60vw; height: 60vw; margin: 20vh auto; background-color: #774C60; }

View on JSFiddle here.

Circle area defined by mouse click

We are going to define the area of a circle depending on where we click within a box area. We can handle this using JavaScript events, a little bit of basic maths and CSS. Width and height are igual, it doesn’t matter which we will set for our maths: JS

const width = e.currentTarget.clientWidth

Absolute position of the mouse cursor from the circle center:

const x = Math.abs(e.clientX — offset.left — width / 2) const y = Math.abs(e.clientY — offset.top — width / 2)

The maximum will tell us the percent of the circle area:

percent = Math.round(2 * Math.max(x, y) * 100 / width) $circle.style.width = percent + '%' $circle.style.height = percent + '%'

Text Overwriting

Well, maybe you are thinking that you can just turn on your Insert key from your keyboard but what If you don’t have it or if you want to always have an overwriting mode (independently) while typing in some specific inputs and textareas. You can do it easily. JS

$input.addEventListener('keypress', function(e) { const cursor_pos = e.currentTarget.selectionStart if (!e.charCode) return $input.value = $input.value.slice(0, cursor_pos) + $input.value.slice(cursor_pos + 1) e.currentTarget.selectionStart = e.currentTarget.selectionEnd = cursor_pos })

View on JSFiddle here.

Counter with a reset using closures

Set up a basic counter with a closure and some external accessible options. JS

Remembler, a closure just let you keep recorded and protected your variables. View on JSFiddle here.

Infinite scroll

Have you ever seen those automatic "Load More" while you scroll down? Did you see them on Tumblr for images, Gmail for messages or Facebook? Cool, isn’t it? The infinite scroll is an alternative for pagination and it’s everywhere. It optimizes the user experience loading data as the user required it (indirectly). You get faster loading process for pages, web, apps and it just loads what you need instead of the whole bunch. You don’t need to add extra interactions, buttons or widgets because it comes with the normal reading behaviour that you are used to: scroll down with the mouse or with the finger in a touchable screen. JS

const $ol = document.querySelector('ol') function load_more() { let html = '' for (var i = 0; i < 5; i++) html += '<li></li>' $ol.innerHTML += html } $ol.addEventListener('scroll', function() { if ($ol.scrollHeight — $ol.scrollTop == $ol.clientHeight) load_more() })

View on JSFiddle here. Just notice in the example above that we could make it more efficient creating nodes and using appendChild().

Material icons

HTML

View on JSFiddle here.

Basic CSS transition using box-shadow

Our CSS will change if the mouse is over the element with an ease-in-out transition effect (slow start and end). We are filling up the element with an inner shadow (inset) CSS

i { transition: all 0.5s ease-in-out; box-shadow: 0 0 0 75px #E94F37 inset; } i:hover { box-shadow: 0 0 0 4px #E94F37 inset; color:#E94F37; }

View on JSFiddle here.

Export HTML table to CSV file

Imagine you have an HTML table and you want to download it as a CSV table. HTML

<table> <tr><th>Name</th><th>Age</th><th>Country</th></tr> <tr><td>Geronimo</td><td>26</td><td>France</td></tr> <tr><td>Natalia</td><td>19</td><td>Spain</td></tr> <tr><td>Silvia</td><td>32</td><td>Russia</td></tr> </table>

First of all, you need to transform from HTML to CSV: JS

let csv = [] let rows = document.querySelectorAll('table tr') for (var i = 0; i < rows.length; i++) { let row = [], cols = rows[i].querySelectorAll('td, th') for (var j = 0; j < cols.length; j++) row.push(cols[j].innerText) csv.push(row.join(',')) } download_csv(csv.join('\n'), filename)

After that, you can download it using Blob and a link:

let csvFile = new Blob([csv], {type: 'text/csv'}) let downloadLink = document.createElement('a') downloadLink.download = filename downloadLink.href = window.URL.createObjectURL(csvFile) downloadLink.style.display = 'none' document.body.appendChild(downloadLink) downloadLink.click()

View on JSFiddle here.

Keyboard events

Use event.code to get a human readable way of knowing which keys are pressed. Use event.key if you want to distinguish between capital letter or not, and avoid browser shortcuts, i.e: Ctrl + P (print) JS

document.onkeydown = event => { switch (event.code) { case ‘ArrowDown’: $div.style.top = `${parseInt($div.style.top || 0) + step}px` break case ‘KeyR’: if (event.altKey) $div.style.top = 0 break } }

View on JSFiddle here.

Short selectors like jQuery

Using JavaScript is some kind of annoying when you have to select DOM elements, in those cases we could miss jQuery because vanilla JavaScript is simply too long. JS

// Select one element (first one) document.querySelector('#peter') document.querySelector('.staff') document.querySelector('.staff').querySelector('.age') // Select all elements document.querySelectorAll('.staff')

We don’t like to repeat things when we are coding, if you define the next code at the beginning of your JavaScript you will be avaliable to do it similar even better than jQuery.

function $(selector) { return document.querySelector(selector) } function $$(selector) { return document.querySelectorAll(selector) } Element.prototype.$ = function(selector) { return this.querySelector(selector) } Element.prototype.$$ = function(selector) { return this.querySelectorAll(selector) }

Now you can write our example shorter:

// Select one element $('#peter') $('.staff') $('.staff').$('.age') // Select all elements $$('.staff')

It’s easy to keep in mind because $ behaves like jQuery with CSS selectors and $$ does the same but it allows you to select multiple elements. The first one return the element and the second one a list of elements. Just one more thing, you cannot use jQuery with this code because jQuery use $ too, if you need it you have to change the $ in our code for another thing, ie: qS. Remember, in JavaScript we have something better than classes: prototype. It doesn’t matter if you use class, under the hood is using prototype.

Which is the different between property and attribute?

A property is in the DOM; an attribute is in the HTML that is parsed into the DOM. HTML

document.body.onload = foo

Avoid switch statement when you don’t need logic

Arrays are faster, in the next example if you want to now which is the nineth month you can just code months[9]. JS

const months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']

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ev3v4hn · 4 years ago

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mbaljeetsingh · 5 years ago

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Practice GraphQL Queries With the State of JavaScript API

Learning how to build GraphQL APIs can be quite challenging. But you can learn how to use GraphQL APIs in 10 minutes! And it so happens I've got the perfect API for that: the brand new, fresh-of-the-VS-Code State of JavaScript GraphQL API.

The State of JavaScript survey is an annual survey of the JavaScript landscape. We've been doing it for four years now, and the most recent edition reached over 20,000 developers.

We've always relied on Gatsby to build our showcase site, but until this year, we were feeding our data to Gatsby in the form of static YAML files generated through some kind of arcane magic known to mere mortals as "ElasticSearch."

But since Gatsby poops out all the data sources it eats as GraphQL anyway, we though we might as well skip the middleman and feed it GraphQL directly! Yes I know, this metaphor is getting grosser by the second and I already regret it. My point is: we built an internal GraphQL API for our data, and now we're making it available to everybody so that you too can easily exploit out dataset!

"But wait," you say. "I've spent all my life studying the blade which has left me no time to learn GraphQL!" Not to worry: that's where this article comes in.

What is GraphQL?

At its core, GraphQL is a syntax that lets you specify what data you want to receive from an API. Note that I said API, and not database. Unlike SQL, a GraphQL query does not go to your database directly but to your GraphQL API endpoint which, in turn, can connect to a database or any other data source.

The big advantage of GraphQL over older paradigms like REST is that it lets you ask for what you want. For example:

query { user(id: "foo123") { name } }

Would get you a user object with a single name field. Also need the email? Just do:

query { user(id: "foo123") { name email } }

As you can see, the user field in this example supports an id argument. And now we come to the coolest feature of GraphQL, nesting:

query { user(id: "foo123") { name email posts { title body } } }

Here, we're saying that we want to find the user's posts, and load their title and body. The nice thing about GraphQL is that our API layer can do the work of figuring out how to fetch that extra information in that specific format since we're not talking to the database directly, even if it's not stored in a nested format inside our actual database.

Sebastian Scholl does a wonderful job explaining GraphQL as if you were meeting it for the first time at a cocktail mixer.

Introducing GraphiQL

Building our first query with GraphiQL, the IDE for GraphQL

GraphiQL (note the "i" in there) is the most common GraphQL IDE out there, and it's the tool we'll use to explore the State of JavaScript API. You can launch it right now at graphiql.stateofjs.com and it'll automatically connect to our endpoint (which is api.stateofjs.com/graphql). The UI consists of three main elements: the Explorer panel, the Query Builder and the Results panels. We'll later add the Docs panels to that but let's keep it simple for now.

The Explorer tab is part of a turbo-boosted version of GraphiQL developed and maintained by OneGraph. Much thanks to them for helping us integrate it. Be sure to check out their example repo if you want to deploy your own GraphiQL instance.

Don't worry, I'm not going to make you write any code just yet. Instead, let's start from an existing GraphQL query, such as the one corresponding to developer experience with React over the past four years.

Remember how I said we were using GraphQL internally to build our site? Not only are we exposing the API, we're also exposing the queries themselves. Click the little "Export" button, copy the query in the "GraphQL" tab, paste it inside GraphiQL's query builder window, and click the "Play" button.

Source URL

The GraphQL tab in the modal that triggers when clicking Export.

If everything went according to plan, you should see your data appear in the Results panel. Let's take a moment to analyze the query.

query react_experienceQuery { survey(survey: js) { tool(id: react) { id entity { homepage name github { url } } experience { allYears { year total completion { count percentage } awarenessInterestSatisfaction { awareness interest satisfaction } buckets { id count percentage } } } } } }

First comes the query keyword which defines the start of our GraphQL query, along with the query's name, react_experienceQuery. Query names are optional in GraphQL, but can be useful for debugging purposes.

We then have our first field, survey, which takes a survey argument. (We also have a State of CSS survey so we needed to specify the survey in question.) We then have a tool field which takes an id argument. And everything after that is related to the API results for that specific tool. entity gives you information on the specific tool selected (e.g. React) while experience contains the actual statistical data.

Now, rather than keep going through all those fields here, I'm going to teach you a little trick: Command + click (or Control + click) any of those fields inside GraphiQL, and it will bring up the Docs panel. Congrats, you've just witnessed another one of GraphQL's nifty tricks, self-documentation! You can write documentation directly into your API definition and GraphiQL will in turn make it available to end users.

Changing variables

Let's tweak things a bit: in the Query Builder, replace "react" with "vuejs" and you should notice another cool GraphQL thing: auto-completion. This is quite helpful to avoid making mistakes or to save time! Press "Play" again and you'll get the same data, but for Vue this time.

Using the Explorer

We'll now unlock one more GraphQL power tool: the Explorer. The Explorer is basically a tree of your entire API that not only lets you visualize its structure, but also build queries without writing a single line of code! So, let's try recreating our React query using the explorer this time.

First, let's open a new browser tab and load graphiql.stateofjs.com in it to start fresh. Click the survey node in the Explorer, and under it the tool node, click "Play." The tool's id field should be automatically added to the results and — by the way — this is a good time to change the default argument value ("typescript") to "react."

Next, let's keep drilling down. If you add entity without any subfields, you should see a little squiggly red line underneath it letting you know you need to also specify at least one or more subfields. So, let's add id, name and homepage at a minimum. Another useful trick: you can automatically tell GraphiQL to add all of a field's subfields by option+control-clicking it in the Explorer.

Next up is experience. Keep adding fields and subfields until you get something that approaches the query you initially copied from the State of JavaScript site. Any item you select is instantly reflected inside the Query Builder panel. There you go, you just wrote your first GraphQL query!

Filtering data

You might have noticed a purple filters item under experience. This is actually they key reason why you'd want to use our GraphQL API as opposed to simply browsing our site: any aggregation provided by the API can be filtered by a number of factors, such as the respondent's gender, company size, salary, or country.

Expand filters and select companySize and then eq and range_more_than_1000. You've just calculated React's popularity among large companies! Select range_1 instead and you can now compare it with the same datapoint among freelancers and independent developers.

It's important to note that GraphQL only defines very low-level primitives, such as fields and arguments, so these eq, in, nin, etc., filters are not part of GraphQL itself, but simply arguments we've defined ourselves when setting up the API. This can be a lot of work at first, but it does give you total control over how clients can query your API.

Conclusion

Hopefully you've seen that querying a GraphQL API isn't that big a deal, especially with awesome tools like GraphiQL to help you do it. Now sure, actually integrating GraphQL data into a real-world app is another matter, but this is mostly due to the complexity of handling data transfers between client and server. The GraphQL part itself is actually quite easy!

Whether you're hoping to get started with GraphQL or just learn enough to query our data and come up with some amazing new insights, I hope this guide will have proven useful!

And if you're interested in taking part in our next survey (which should be the State of CSS 2020) then be sure to sign up for our mailing list so you can be notified when we launch it.

State of JavaScript API Reference

You can find more info about the API (including links to the actual endpoint and the GitHub repo) at api.stateofjs.com.

Here's a quick glossary of the terms used inside the State of JS API.

Top-Level Fields

Demographics: Regroups all demographics info such as gender, company size, salary, etc.

Entity: Gives access to more info about a specific "entity" (library, framework, programming language, etc.).

Feature: Usage data for a specific JavaScript or CSS feature.

Features: Same, but across a range of features.

Matrices: Gives access to the data used to populate our cross-referential heatmaps.

Opinion: Opinion data for a specific question (e.g. "Do you think JavaScript is moving in the right direction?").

OtherTools: Data for the "other tools" section (text editors, browsers, bundlers, etc.).

Resources: Data for the "resources" section (sites, blogs, podcasts, etc.).

Tool: Experience data for a specific tool (library, framework, etc.).

Tools: Same, but across a range of tools.

ToolsRankings: Rankings (awareness, interest, satisfaction) across a range of tools.

Common Fields

Completion: Which proportion of survey respondents answered any given question.

Buckets: The array containing the actual data.

Year/allYears: Whether to get the data for a specific survey year; or an array containing all years.

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suzanneshannon · 5 years ago

Text

Practice GraphQL Queries With the State of JavaScript API

The State of JavaScript survey is an annual survey of the JavaScript landscape. We've been doing it for four years now, and the most recent edition reached over 20,000 developers.

"But wait," you say. "I've spent all my life studying the blade which has left me no time to learn GraphQL!" Not to worry: that's where this article comes in.

What is GraphQL?

The big advantage of GraphQL over older paradigms like REST is that it lets you ask for what you want. For example:

query { user(id: "foo123") { name } }

Would get you a user object with a single name field. Also need the email? Just do:

query { user(id: "foo123") { name email } }

As you can see, the user field in this example supports an id argument. And now we come to the coolest feature of GraphQL, nesting:

query { user(id: "foo123") { name email posts { title body } } }

Sebastian Scholl does a wonderful job explaining GraphQL as if you were meeting it for the first time at a cocktail mixer.

Introducing GraphiQL

Building our first query with GraphiQL, the IDE for GraphQL

Source URL

The GraphQL tab in the modal that triggers when clicking Export.

If everything went according to plan, you should see your data appear in the Results panel. Let's take a moment to analyze the query.

Changing variables

Using the Explorer

Filtering data

Conclusion

Whether you're hoping to get started with GraphQL or just learn enough to query our data and come up with some amazing new insights, I hope this guide will have proven useful!

And if you're interested in taking part in our next survey (which should be the State of CSS 2020) then be sure to sign up for our mailing list so you can be notified when we launch it.

State of JavaScript API Reference

You can find more info about the API (including links to the actual endpoint and the GitHub repo) at api.stateofjs.com.

Here's a quick glossary of the terms used inside the State of JS API.

Top-Level Fields

Demographics: Regroups all demographics info such as gender, company size, salary, etc.

Entity: Gives access to more info about a specific "entity" (library, framework, programming language, etc.).

Feature: Usage data for a specific JavaScript or CSS feature.

Features: Same, but across a range of features.

Matrices: Gives access to the data used to populate our cross-referential heatmaps.

Opinion: Opinion data for a specific question (e.g. "Do you think JavaScript is moving in the right direction?").

OtherTools: Data for the "other tools" section (text editors, browsers, bundlers, etc.).

Resources: Data for the "resources" section (sites, blogs, podcasts, etc.).

Tool: Experience data for a specific tool (library, framework, etc.).

Tools: Same, but across a range of tools.

ToolsRankings: Rankings (awareness, interest, satisfaction) across a range of tools.

Common Fields

Completion: Which proportion of survey respondents answered any given question.

Buckets: The array containing the actual data.

Year/allYears: Whether to get the data for a specific survey year; or an array containing all years.

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tak4hir0 · 6 years ago

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In an attempt to dispel the idea that if you have to google stuff you’re not a proper engineer, this is a list of nearly everything I googled in a week at work, where I’m a software engineer with several years’ experience. Obviously these weren’t all googled in a row (although you can probably spot that a few were), but throughout the day. I can’t remember the context of everything I was googling, but hopefully it’ll make you feel a little better next time you have to google something. Mondaynpm react-testing-library - during a React upgrade, looking at dependencies to see latest versions and checking for breaking changes. Expecting a parsed GraphQL document. Perhaps you need to wrap the query string in a "gql" tag? - said React upgrade then started causing some super fun errors. react-apollo release notes react-apollo/test-utils - tests were throwing some odd errors with our graphQL components. undo a rebase - oops. react testing library apollo "invariant violation" - package upgrades are so much fun! jest silence warnings - don’t judge me, ok? semantic HTML contact details - wanted to check if the tag was relevant here aa contrast checker temporary visual impairment - fact checking for an accessibility talk I was giving that week dominos accessibility - popcorn.gif shame gif - an important part of any presentation Tuesdayjavascript get array of unique dates - if I have an array of Dates, how can I filter them so they are unique? (reduce, naturally, but I can rarely use that without googling it first) date to locale string js date to locale string - after I got a load of Java results alternatives to Moment.js - it’s large group array items by date - more reduce fun sort object keys javascript react fragment keys next link - needed a reminder of how to use the Link component in Next.JS React.Children.only expected to receive a single React element child. visual studio code disable autocomplete html - it keeps autoclosing HTML elements on the same line, and I still can’t switch it off dt dd dl - couldn’t remember what the example use for these was. html nested sections - is it ok to have inside ? display dl in pairs veggie ipsum - the best lorem ipsum generator css keyframes css animate underline text dl vs ul react generating keys - should I use some kind of hash, or should I use data in the props? (I ended up constructing a string with unique timestamp data) css checkbox - can we style checkboxes yet? (no) flexbox center span - it was 17:24 and I was tired by this point grid minmax flexible grid row - I don’t have a whole lot of CSS Grid experience, so I always end up googling a ton with this. grid row height auto cauliflower shortage - someone told me about this and I panicked next.js hooks - we can use them, right? (we can, and I did) Wednesdaycors - today is going to be bleak the corrs - once I hit some CORS errors I decided I needed to make a meme, and I needed to find the perfect image. It took a surprisingly long time. Worth itgit patch trailing whitespace - I was sent a git patch with some whitespace that prevented it from actually patching jsx annotation web api fetch preflight - in my CORS adventures I wanted to read up a bit more about preflight requests. web api fetch origin header discriminated union flow - trying to diagnose problems with my Flow types. whitespace regex - is it \w? (no, that’s a word - it’s \s) regex not letter pat butcher emoji - what can I say, I google important things woman shouting at cat google oauth next.js authentication - sometimes it’s helpful to google stuff to see if anyone has written examples of how to do common flows in the framework or tool that you’re using component displayname - do I need to do this with my higher-order components? nextCookie - starting to mess around with oauth cookies reading cookies in react - there must be a better way than document.cookie js-cookie npm cookies-js npm cookie universal-cookie google oauth cookie 🍪 Thursday"log in with google" localhost - was having all sorts of problems getting this to work httpserverrequest javascript - I have a feeling this was something to do with Flow types nextjs flowtypes - yep, there you go "python-social-auth" react - trying to figure out if the django backend I was working with would play nicely with my React frontend google social login vary header get cookie from 302 google social login cookies - I was having a really fun time with this as you can tell google oauth cookie python-social-auth set-cookie python-social-auth site:stackoverflow.com python-social-auth react site:stackoverflow.com django - I think I gave up at this point and just googled Django because I have literally never used it fetch send cookies testing same origin credentials locally cross origin cookies - spoiler alert: not a thing useState default value "The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when when the request's credentials mode is 'include'. - googling error messages is only second to console.log() as a debugging method useState with empty array react hooks initial state empty array "Provisional headers are shown" - this is where the requests weren’t going through and I couldn’t see what the actual headers being sent were fetch send cookies how to see request headers in chrome fetch not sending cookies Thursday was a whole lot of fun D: Fridayprovisional headers are shown - still at it. sending cookies from localhost - have I mentioned that I hate cookies? editing host file - desperate times (and it didn’t even work) sending cookies with different domain next cookie getinitialprops functional component getting cookies from document js find - to check the usage and return types string contains string methods js - I can’t keep any of these in my head js string methods - 20 mins later js fetch manual cookie django react cookies localhost django react cookies localhost site:stackoverflow.com httponly cookie django httponly async await promise.all nextjs port google appengine node ports next rename static install gcloud cli method patch - couldn’t remember what the HTTP method PATCH does. nextjs env next.js environment variables next js docs editing data with hooks - literally no idea what I was trying to google here but this was past 5pm so I was evidently quite tired react form submit dayjs - I needed the documentation again. What I’m trying to show with all this is that you can do something 100 times but still not remember how to do it off the top of your head. Never be ashamed of googling, even if it seems like the most basic thing you’re looking up. I can never remember how Date works. I’ve built plenty of forms in React but couldn’t remember how onSubmit worked on the Friday evening at 5:30pm. I constantly have to google JS string methods. Cookies are terrible. (Incidentally, we fixed the cookie issue by running everything in a docker container and tunneling with ngrok, so everything’s on the same domain.)

#localghost

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jamiekturner · 8 years ago

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jQuery Form Plugins To Use In Your Websites (46 Options)

Have you tried creating the forms from scratch on your website? Why not use jQuery form plugins?

Having forms on your website just doesn’t really cut it. You need those forms to be validated to receive the appropriate data from the sender.

This way you don’t only stave off unwanted submissions, but you also guide your senders to fill out the forms.

Validating the date is just as important as having the forms themselves.

There are a few ways to create flawless forms, and the good news is that if you use some of the jQuery Form Plugins available, things get much easier.

jQuery form plugins to check out

Fileuploader

Fileuploader is a beautiful and powerful HTML5 file uploading tool. A jQuery and PHP plugin that transforms the standard file input into a revolutionary and fancy field on your page.

File preview with image thumbnail or icon

File image thumbnail can be generated in canvas to resize it perfectly for given with and height

Render synchron the file preview

File icon background is generated from file extension

Customize your own input and thumbnail elements

Responsive and fancy animations

Choose multiple files from different folders

Drag&Drop feature

Upload each file with Ajax

Upload synchron the files

Upload progressbar with many data available

Start, retry and cancel upload actions

Paste images from clipboard (only in Chrome)

Validate the file’s limit, size and extension. You can also use your own function

Edit mode for already uploaded files

All files are in one list in a hidden input

Use input HTML attributes to configurate it

HTML template renderer using Text variables

CSS file icon

PHP upload helper

PHP generates an array with many file informations

PHP can create a custom file name

API and more than 24 Callbacks to manipulate freely the appearance and functionality of your file input

Conditionize.js

A small jQuery plugin for handling showing and hiding things conditionally based on input – typically groups of form fields. It works using data attributes to keep all of the name/values for inputs directly in the markup and saves you the trouble of having to manually show/hide a bunch of stuff through JS, as well as improving maintenance if you need to change the name or value of an input you were listening to.

Cleave.js

Cleave.js has a simple purpose: to help you format input text content automatically.

Credit card number formatting

Phone number formatting (i18n js lib separated for each country to reduce size)

Date formatting

Numeral formatting

Custom delimiter, prefix and blocks pattern

CommonJS / AMD mode

AttrValidate

A lightweight jQuery plugin for basic form validation using HTML5 form attributes. Recommended as a polyfill for older browsers which do not provide built-in validation.

Mobiscroll Forms

Mobiscroll Forms supports multiple themes for different platforms and the web – iOS, Android, Windows Phone.

Shipping with 13 elements for:

Single line and multiline text

Select styling

Buttons

Segmented control

Checkbox and checklist

Radio buttons

Switch

Stepper

Page styling & Typography

Slider

Progress

Alert, confirm and prompt

Toast and snackbar

Multipicker

Multipicker is jQuery plugin for selecting days, numbers or other elements, it supports multi selecting (like checkboxes) or single element selection (like radio buttons).

SmartWizard

Smart Wizard is a flexible and heavily customizable jQuery step wizard plugin with Bootstrap support. It is easy to implement and gives a neat and stylish interface for your forms, checkout screen, registration steps etc. Based on the feedback from our users over the past years we have come up with the best ever built jQuery wizard plugin of all time.

Features:

Bootstrap support

Responsive themes

Heavily customizable toolbar, option to add extra buttons

Theme support with various themes included

Customizable css styles

Url navigation and step selection

Public methods for external function call

Enhanced event support

In-built wizard reset method

Ajax content loading with option to specify individual url for steps

Keyboard navigation

Contact Form to Google Spreadsheet

Create Contact Form in HTML and submit the data to Google Spreadsheet. Google re-captcha has been integrated to protect forms to be submitted by robots. Check the demo and documentation for more details.

Features:

Google Spreadsheet as database: Uses Google Spreadsheet to capture form responses. New responses can be appended at the top.

Simple Form: Designed with simple HTML5, CSS3 and bootstrap.

Protection: Google re-captcha to prevent spamming.

Customization: You can customize the form according to your own requirement.

Look and feel: Bootstrap two column layout, responsive. Shows status loader when the form is being submitted.

Notification: Can send notification email to the admin with submitted form data.

Hierarchy Select

A jQuery hierarchy select plugin used for selecting hierarchy structures in a selectbox format with autocomplete search.

SmartMenu

SmartMenu is a user-friendly, highly customizable and responsive jQuery mega menu plugin. It allows you to use multiple menus with different submenus.

Features:

Responsive design

Supports multiple instances

Horizontal (top, bottom) or Vertical (left, right) menu layouts

Mega / Flyout submenus

Pure CSS3 animations (fade, slide)

3 ways of dropdown (hover, click, toggle)

7 color skins which can be changed easily

Custom mega dropdowns, forms, search bar, social icons or HTML

12 columns fluid grid

You can add images, maps or videos

BunnyJS

BunnyJS is a modern Vanilla JS and ES6 library and next-generation front-end framework, package of small stand-alone components without dependencies.

No dependencies – can be used in any project anywhere anytime

0 learning curve – you can start right now, just plain JavaScript with simple architecture easy to maintain and extend

Designed in mind to build modern, complicated, real world business apps

Faster, simpler, enjoyable than any frontend framework

Large set of ready components, custom UI elements and utils

Dirrty

Dirrty lightweight jquery plugin to detect if the fields of a form had been modified.

If a field has been modified then the form is dirrty

Detect the moment when the form gets dirty, and trigger a custom event, for example enable a “save changes” button

Detect the moment when the form gets clean again, and trigger a custom event, for example disable the “save changes” button, cause is not necesary

Prompt the user to save changes before leaving if the form is dirty

Inputmask

jQuery inputmask is a jquery plugin which create an input mask.

An inputmask helps the user with the input by ensuring a predefined format. This can be usefull for dates, numerics, phone numbers, …

Features:

easy to use

optional parts anywere in the mask

possibility to define aliases which hide complexity

date / datetime masks

numeric masks

lots of callbacks

non-greedy masks

many features can be enabled/disabled/configured by options

supports readonly/disabled/dir=”rtl” attributes

support data-inputmask attribute

multi-mask support

Formbase

Formbase is a better default styles for common input elements.Formbase eliminates cross browser bugs, inconsistencies across systems and applies a beautiful default styling to several input elements.

Works in all modern browsers (and IE11)

No JavaScript, just CSS

Works with inputs, textareas, checkboxes and radio buttons

Zero dependencies

File Input

File input fields look differently in all browsers. It’s a pain in the arse to design something that looks nice in all browsers and it sucks that support for this is not available in Twitter Bootstrap. This jQuery plugin is designed to make all file input fields look like standard Twitter Bootstrap buttons.

Form Designer

FORM-DESIGNER is a jQuery form builder tool which will help you to build an interactive form to use in your website template. This is mainly a HTML developer’s tool, but anyone who have a little knowledge about CSS and HTML structure and use of them, can use this tool.

I try to keep this jquery application very simple and user-friendly so that anyone can understand it within one or two tries.In this tool you will get total 7 option to create form from 7 different template and one option to create a custom form. As a final output, you will get the HTML,CSS and jQuery code here.

Choices.js

A vanilla, lightweight (~15kb gzipped), configurable select box/text input plugin. Similar to Select2 and Selectize but without the jQuery dependency.

Lightweight

No jQuery dependency

Configurable sorting

Flexible styling

Fast search/filtering

Clean API

Right-to-left support

JSON Manager

JSON manager: jQuery plug-in that converts JS & JSON objects to HTML forms and back again.

Medea loves JSON. Give Medea a JSON object, even one with nested objects, and it will be converted into an HTML form. The form allows fields in the object to be edited, or deleted, or for new ones to be created. The modified object is returned via the submit event.

Spider

Mailgun API for mail validation online

50+ Form templates

Ajax form

Remote/server validation

Php ready form

Dynamic field

Credit card validator

Zip/Pin code validator

Semantic ui integrated

Custom error container

custom error handler

Multiple input validator As one

button style included

60+ button style included in package

TextArea

One of the most used, but under featured HTML controls, is the humble TEXTAREA control. This control is designed to accept large blocks of text from the user. A wide variety of plugins exist for the TEXTAREA that layer it with toolbars, auto-resizing, rich-text editing and the works.

More jQuery form plugins?

Keep scrolling.

There are more.

Character and Word Counter

This jQuery Word and character counter plug-in allows you to count characters or words, up or down. You can set a minimum or maximum goal for the counter to reach.

Create a custom message for your counter’s message

Force character/word limit on user to prevent typing

Works against copy/paster’s!

Addel

Addel is a simple & lightweight jQuery form plugin for powering UIs that enable dynamic addition & deletion of HTML elements, conceived with form elements in mind.

PopSelect

A jQuery plugin to replace the traditional <select> box with a sleek Popover with options pre-populated. Better User interface than any other multiselects.

Timon

With Timon – Step Form Wizard you will have power combo of 21 different styles, 8 different transition effects, validation in your step form, titles and subtitles with multiple step. , also Timon – Step Form Wizard has predefined set of form sizes from tiny to large. You can easily create and customize any form to fit your needs.

Features:

Step navigation

Fully responsive

Many options for design and function

Can be used for tabs

Step navigation

21 Style

8 transition effect

Select.js

Another one of these jQuery form plugins is Select.js. It is a Javascript and CSS library for creating styleable select elements. It aims to reproduce the behavior of native controls as much as is possible, while allowing for complete styling with CSS.

Tagger Widget

jQuery plugin to turn a HTML select into an auto-suggesting, tagging widget. It was written from the ground up and has support for hierachical data, searching for data that isn’t displayed, displaying arbitrary HTML in the suggestion list, running the original onChange actions, displaying tags for items previously selected but no longer in the list, keyboard accessibility and many other features.

formBuilder

A jQuery plugin for drag and drop form creation. To start building forms with this plugin call formBuilder() on the textarea you would like to make your editor. FormBuilder takes a number of options and is translatable.

OrderNow

PHP Order Form will helps to get project orders from the clients for the people like web developers, corporates and freelancers easily. This form is PayPal integrated and admin functionalities are integrated.

Features:

Responsive design layout

PHP order form with MySql database

Multitab features

Cross-browser platform

Contents are organized in a user-friendly format

Admin can manage all contents and order management

Mail Templates are available in admin side

Easy Forms

Easy Forms is one of the jQuery form plugins in this article that will help you design and develop web forms quickly and easily. Actually, you will not need programming skills to make your forms work in minutes.

Build any type of online forms: Contact forms, Order forms, Registration forms, Online surveys, Trivias and more.

Drag & Drop Fields. No coding skills required.

HTML5 Fields Support

Create Multi-Step Forms

Bootstrap CSS Support

Theme & Template Managers

Advanced CSS Editor with Form Live Preview

Parsley

Parsley.js is a lightweight and feature-rich library that instead of validating forms with Javascript, it uses data attributes embedded in the DOM to achieve the same function. The surprisingly easy to configure plugin also allows you to override almost every default behavior so that it will fit in with your form requirements.

jQuery Validation Engine

When it comes to the jQuery Validation Engine, you don’t need to worry about the structure of your form as the plugin will create an error DIV and position it in the top right corner of the specified input, keeping both the forms code and validations seperate. Phis is probably the easiest validation solution in this article.

Validatr

Validatr uses HTML5 input attributes to perform validation, with support for color, date, email, number and range. The input types text, checkbox, radio…. are supported, but do not require the same level of validation.

Where possible, Validatr will use native validation, using Modernizr to test for support. If an input type is not supported it will use it’s own ruleset to supplement native validation. In both cases case, the validation message is shown.

Smoke

Smoke is a collection of components for Bootstrap – including a form validator. In comparison to the other Bootstrap validator (#4), it doesn’t use native browser validation – therefore error messages aren’t automatically localized and validation rules have to be specified using HTML5 and data attributes, as well as JavaScript.

Validetta

This plugin offers validation using a data attribute, with quite limited options. It comes with just the basic validation rules, everything else can be added with custom regular expressions – but there is no example demonstrating it. Compared to the other plugins, the only unique feature is that error messages are displayed in a bubble (see demo below).

jQuery.validity

A plugin to control validation with JavaScript only – no HTML5 or data attributes. While this may be helpful for dynamic validation rules, the plugin doesn’t offer enough options to make writing efficient. It even doesn’t allow using new HTML5 type attributes like email, nor does it provide a function to check if a form is valid – necessary in order to show a success message.

h5Validate

This plugin has unfortunately been abandoned by its creator (Eric Elliott). Consequently, the demo/documentation website returns a 404 and there are two dozen open issues. The plugin doesn’t automatically validate inputs by type and the following example even doesn’t show error messages. We’ve included it in the list, as Eric is looking for a new maintainer for the project, so there’s a chance that at some point in the future, it might get some life breathed back into it.

SkipOnTab

A jQuery plugin to exempt selected shape fields from the ahead tab order.This library is maximum beneficial while the customers are familiar with the shape, and makes use of it frequently.

Contact Tabs

A jQuery shape generator for creating limitless slide-out or static touch tabs containing AJAX powered customised bureaucracy. Plugin consists of 12 one-of-a-kind form factors and consumer-aspect validation.

Simple Contact Form

With jQuery Simple Contact Form, you could installation an ajax touch form for your website, writing only the form html code and one js code line. Email is generated and ship by using the plugin (php report blanketed) .

Form Recover

By installing this plugin you’ll permit your users to have a draft of their shape saved and restored automatically in cases of unintended refresh or browser crash.

Forms Plus

Forms Plus is a form framework. JS version includes everything CSS has, plus date/time pickers, shade pickers, sliders, captcha fields, spinners, area groups (for code, credit card number, and many others.)

Prosto Forms

Prosto Forms is a responsive Form Framework and set of beautiful shape factors with large quantity of javascript capabilities: validation, protecting, modals, ajax put up, datepickers.

Simple Subscription Popup

Simple Signup jQuery Form Plugins will gather the visitor’s electronic mail deal with in your internet site with an attention-grabber, effective manner. It has a number of elective customization alternatives and you may setup truely in mins.

Foggle

jQuery Foggle is a plugin that helps you to interact with various shape factors primarily based on consumer-enter. It helps you to pick which elements to allow (or disable) whilst the person fills out the shape.

WizardPro

WizardPro lets in you to create website wizards in only a few mins. You can use this plugin for nearly some thing that requires some steps, like a utility installer, a signup or touch form.

Virtual Phone Number Selling Form

Virtual Phone Number Selling Form is a selling form for those voip commercial enterprise who’re promoting virtual telephone numbers designed for All styles of VOIP Business. It’s an jQuery Plugin based totally on present day Bootstrap 3.3.7.

If you liked this article with jQuery form plugins, you should check out these as well:

jQuery Bootstrap Plugins (51 Great Examples)

Charts And Graphs Javascript Libraries

jQuery Lightbox Plugins (19 Examples)

jQuery Gallery Plugins For Showcasing Images Better

The post jQuery Form Plugins To Use In Your Websites (46 Options) appeared first on Design your way.

from Web Development & Designing http://www.designyourway.net/blog/resources/jquery-form-plugins/

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lewiskdavid90 · 8 years ago

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holytheoristtastemaker · 5 years ago

Link

One of the most important things which is also often neglected by developers - the performance. One of the key focus area for the 1.0 release was making it blazingly fast ⚡

TypeGraphQL is basically an abstraction layer built on top of the reference GraphQL implementation for JavaScript - graphql-js. To measure the overhead of the abstraction, a few demo examples were made to compare it against the "bare metal" - using raw graphql-js library.

It turned out that in the most demanding cases like returning an array of 25 000 nested objects, the old version 0.17 was even about 5 times slower!

library execution time TypeGraphQL v0.17 1253.28 ms graphql-js 265.52 ms

After profiling the code and finding all the root causes (like always using async execution path), the overhead was reduced from 500% to just 17% in v1.0.0! By using simpleResolvers it can be reduced even further, up to 13%:

execution time graphql-js 265.52 ms TypeGraphQL v1.0 310.36 ms with "simpleResolvers" 299.61 ms with a global middleware 1267.82 ms

Such small overhead is much easier to accept than the initial 500%! More info about how to enable the performance optimizations in the more complex cases can be found in the docs 📖.

Schema isolation

This is another feature that is not visible from the first sight but gives new possibilities like splitting the schema to public and private ones 👀

In 0.17.x and before, the schema was built from all the metadata collected by evaluating the TypeGraphQL decorators. The drawback of this approach was the schema leaks - every subsequent calls of buildSchema was returning the same schema which was combined from all the types and resolvers that could be find in the metadata storage.

In TypeGraphQL 1.0 it's no longer true! The schemas are now isolated which means that the buildSchema call takes theresolvers array from options and emit only the queries, mutation and types that are related to those resolvers.

const firstSchema = await buildSchema({ resolvers: [FirstResolver], }); const secondSchema = await buildSchema({ resolvers: [SecondResolver], });

So just by modifying the resolvers option we can have different sets of operations exposed in the GraphQL schemas! Proper isolation also makes serverless development easier as it allows to get rid of the "Schema must contain uniquely named types" errors and others.

Directives and extensions

This two new features are two complementary ways to put some metadata about the schema items.

GraphQL directives though the syntax might remind the TS decorators, as "a directive is an identifier preceded by a @ character", but in fact, they are a purely Schema Definition Language feature. Apart from the metadata capabilities, they can also modify the schema and e.g. generate the connection type for pagination purposes. Basically, the looks like this:

type Query { foobar: String! @auth(requires: USER) }

To apply them, we just need to put the @Directive decorator above and supply the string argument, e.g.:

@Resolver() class FooBarResolver { @Directive("@auth(requires: USER)") @Query() foobar(): string { return "foobar"; } }

However, on the other side we have the GraphQL extensions which are the JS way to achieve the same goal. It's the recommended way of putting the metadata about the types when applying some custom logic.

To declare the extensions for type or selected field, we need to use @Extensionsdecorator, e.g.:

@ObjectType() class Foo { @Extensions({ roles: [Role.User] }) @Field() bar: string; }

We can then read that metadata in the resolvers or middlewares, just by exploring the GraphQLResolveInfo object, e.g.:

export const ExtensionsMiddleware: MiddlewareFn = async ({ info }, next) => { const { extensions } = info.parentType.getFields()[info.fieldName]; console.log(extensions?.roles); // log the metadata return next(); };

More info about directives and extensions features can be found in docs 📖

Resolvers and arguments for interface fields

The last thing that was preventing TypeGraphQL from being fully GraphQL compliant thus blocking the 1.0 release - an ability to provide interface fields resolvers implementations and declare its arguments.

Basically, we can define resolvers for the interface fields using the same syntax we would use in case of the @ObjectType, e.g.:

@InterfaceType() abstract class IPerson { @Field() avatar(@Arg("size") size: number): string { return `http://i.pravatar.cc/${size}`; } }

...with only a few exceptions for cases like abstract methods and inheritance, which you can read about in the docs.

More descriptive errors messages

One of the most irritating issues for newcomers were the laconic error messages that haven't provided enough info to easily find the mistakes in the code.

Messages like "Cannot determine GraphQL input type for users" or even the a generic "Generating schema error" were clearly not helpful enough while searching for the place where the flaws were located.

Now, when the error occurs, it is broadly explained, why it happened and what could we do to fix that, e.g.:

Unable to infer GraphQL type from TypeScript reflection system. You need to provide explicit type for argument named 'filter' of 'getUsers' of 'UserResolver' class.

or:

Some errors occurred while generating GraphQL schema: Interface field 'IUser.accountBalance' expects type 'String!' but 'Student.accountBalance' is of type 'Float'

That should allow developers to safe tons of time and really speed up the development 🏎

Transforming nested inputs and arrays

In the previous releases, an instance of the input type class was created only on the first level of inputs nesting. So, in cases like this:

@InputType() class SampleInput { @Field() sampleStringField: string; @Field() nestedField: SomeNestedInput; } @Resolver() class SampleResolver { @Query() sampleQuery(@Arg("input") input: SampleInput): boolean { return input.nestedField instanceof SomeNestedInput; } }

the nestedField property of input was just a plain Object, not an instance of the SomeNestedInput class. That behavior was producing some unwanted issues, including limited support for inputs and args validation.

Since 1.0 release, it's no longer an issue and all the nested args and inputs are properly transformed to the corresponding input type classes instances, even including deeply nested arrays

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