#reactjs webinars

[react-development-krishna]

8 Top Websites that Offer ReactJS Workshops

In the world of web development, staying up-to-date with the latest technologies is crucial to remain competitive and relevant. One such technology that has taken the web development community by storm is ReactJS. ReactJS developed and maintained by Facebook, has become the de-facto library for building user interfaces. Its component-based architecture and efficient rendering make it a popular choice among developers. To help developers learn and master ReactJS, various websites offer workshops tailored to different skill levels. In this article, we will explore eight top websites that offer ReactJS workshops.

1. Reactiflux

Reactiflux is an online community for React enthusiasts. It provides a platform for developers to connect, learn, and share their knowledge about ReactJS. While Reactiflux is not solely dedicated to workshops, it offers a wealth of resources including live discussions, Q&A sessions, and learning channels that cover various aspects of React development. Developers can benefit from the real-time interactions and gain insights into best practices, problem-solving approaches, and the latest trends in ReactJS.

2. React Training

React Training is a well-known organization that specializes in providing high-quality React workshops and training. Founded by renowned React experts, the workshops offered by React Training cater to developers of all skill levels – from beginners to advanced practitioners. The workshops are designed to cover a wide range of topics, including React fundamentals, state management, and advanced patterns. With a focus on hands-on learning, developers can gain practical experience and a deeper understanding of ReactJS.

3. Frontend Masters

Frontend Masters is a comprehensive platform that offers in-depth workshops on various frontend technologies, including ReactJS. Their workshops are taught by industry experts and cover a wide range of topics, from the basics of React to advanced techniques such as server-side rendering and performance optimization. Frontend Masters' workshops are highly regarded for their depth and quality, making them an excellent choice for developers who want to elevate their ReactJS skills.

4. Udemy

Udemy is a popular online learning platform that hosts a vast array of courses, including numerous ReactJS workshops. While the quality of courses on Udemy can vary, it offers an accessible entry point for developers looking to learn ReactJS at their own pace. The platform features workshops created by independent instructors, allowing developers to choose courses that align with their learning preferences and skill levels.

5. Egghead

Egghead is a platform known for its concise and focused video tutorials on web development topics, including ReactJS. Egghead's workshops are designed to be bite-sized, allowing developers to learn specific concepts or techniques quickly. The platform is particularly valuable for developers who prefer short, targeted lessons that can be integrated into their workflow. With a library of ReactJS workshops covering diverse topics, Egghead is a go-to resource for on-the-go learning.

6. Meetup

Meetup is a unique platform that connects people with shared interests, and it's not limited to online learning. Developers interested in attending in-person ReactJS workshops and meetups can use Meetup to find local events hosted by React enthusiasts and experts. These events provide opportunities to network, learn from peers, and engage in hands-on coding sessions. Meetup is a fantastic option for developers who thrive in interactive, face-to-face learning environments.

7. React Summit

React Summit is a conference that focuses on all things React, including workshops led by prominent members of the React community. While React Summit is primarily a conference, it often offers pre-conference and post-conference workshops that delve deep into ReactJS topics. These workshops are ideal for developers who want to combine the intensity of a conference with the depth of focused workshops.

8. Hashnode

Hashnode is a developer-focused social network and blogging platform. While it's not exclusively a workshop platform, it hosts articles, tutorials, and interactive coding challenges related to ReactJS. Developers can learn from others' experiences, ask questions, and even contribute their own tutorials. Hashnode's community-driven approach provides a unique learning experience that complements traditional workshop formats.

Conclusion

ReactJS workshops are essential for developers who want to master this powerful library and stay at the forefront of web development. The eight websites mentioned – Reactiflux, React Training, Frontend Masters, Udemy, Egghead, Meetup, React Summit, and Hashnode – offer diverse options for developers to learn ReactJS, ranging from interactive workshops to bite-sized tutorials and community-driven learning. As the field of web development continues to evolve, these resources play a crucial role in empowering developers to build stunning and responsive user interfaces using ReactJS.

[primathontech]

The Future of React.js: How We Stay at the Forefront of Innovation

Introduction:

React.js, a popular JavaScript library for building user interfaces, has revolutionized web development with its component-based architecture and efficient performance. As the technology continues to evolve, it’s essential to stay at the forefront of innovation to deliver high-quality, innovative web applications that meet the ever-changing needs of users. In this blog, we’ll explore how we stay ahead of the curve in React.js development and ensure that our skills and expertise remain relevant in the future.

1. Continuous Learning and Skill Development:

To stay at the forefront of React.js innovation, we prioritize continuous learning and skill development. This includes attending workshops, webinars, and conferences, as well as participating in online courses and tutorials. By investing in our team’s growth, we ensure that they are well-equipped to handle new challenges and opportunities in React.js development.

2. Adopting the Latest Trends and Best Practices:

We keep a close eye on the latest trends and best practices in React.js development, adopting new techniques and tools as they become available. This includes staying up-to-date with the latest releases of React.js, as well as exploring new libraries, frameworks, and tools that can enhance our development process.

3. Collaborating with the React.js Community:

We actively engage with the React.js community, participating in online forums, discussion boards, and social media groups. By collaborating with other React.js developers, we can share knowledge, insights, and best practices, as well as learn from their experiences and expertise.

4. Building a Strong Portfolio of React.js Projects:

To demonstrate our proficiency in React.js development, we build a strong portfolio of projects that showcase our skills and expertise. This includes developing innovative web applications, contributing to open-source projects, and participating in hackathons and coding challenges. By showcasing our work, we can attract new clients and opportunities, as well as build our reputation as a leading React.js development company.

5. Providing Cutting-Edge Solutions to Clients:

Finally, we strive to provide cutting-edge solutions to our clients, leveraging the latest trends and best practices in React.js development. By delivering high-quality, innovative web applications, we can help our clients stay ahead of the curve and achieve their business goals.

Conclusion:

Staying at the forefront of React.js innovation requires a commitment to continuous learning, collaboration, and excellence. By investing in our team’s growth, adopting the latest trends and best practices, engaging with the React.js community, building a strong portfolio of projects, and providing cutting-edge solutions to clients, we can ensure that our skills and expertise remain relevant and valuable in the future.

Invest into hire reactjs developer in your team’s growth, and unlock the full potential of React.js for your web development projects. With a forward-thinking approach to React.js development, you can create web applications that captivate users, enhance your brand, and drive your business growth and success.

[vinhjacker1]

How do I find skill next js developer?

Finding a skilled Next.js developer involves several steps:

Job Boards and Platforms: Utilize job boards like LinkedIn, Indeed, and specialized tech platforms such as Stack Overflow Jobs or GitHub Jobs. Post detailed job descriptions and skill requirements.

Freelance Platforms: Websites like Upwork, Toptal, and Freelancer allow you to search for freelance Next.js developers. Review profiles, portfolios, and ratings to find a suitable match.

Tech Communities: Explore developer communities and forums like GitHub, Reddit (e.g., r/reactjs), or Hashnode. Engage in discussions and network with developers who specialize in Next.js.

Social Media and Networking: Platforms like Twitter, LinkedIn, and tech-focused groups on Facebook often have professionals showcasing their expertise. Connect with them or seek referrals.

Developer Events and Conferences: Attend tech conferences, webinars, or local meetups focusing on JavaScript or React. These events can be excellent networking opportunities.

Referrals and Recommendations: Ask for recommendations from colleagues, friends, or within professional networks. Personal referrals often lead to finding reliable developers.

Evaluate Portfolios and Experience: Review portfolios and GitHub repositories of potential candidates to assess their skills, experience, and the quality of their work.

During the hiring process, consider conducting technical assessments or interviews to gauge their understanding of Next.js, React, and JavaScript fundamentals. Assess their problem-solving abilities and familiarity with building applications using Next.js. This approach helps ensure you find a developer whose skills align with your project requirements.

[zzmoksha123456]

Enroll Now: https://bit.ly/33SF4SB Attend Free Online Workshop on Full Stack Application Development using Microservies & ReactJS by Mr.Narsi Live on: 26th September @ 10.00 AM (IST) For More Details: Visit: https://nareshit.com/new-batches-hyderabad/ Call: +91-9000994007, 9000994008, 9121104164 support@nareshit.com Chat With Our TEAM : https://bit.ly/chatwithGuide Stay at Home, Stay Safe & Update Your Skills from Home #fullstack #applicationdevelopment #microservices #reactjs #workshop #webinar #onlinetraining #education #software #technology #edtech #it #course #class #career #job #engineering #student #programming #learnfromhome #nareshitechnologies https://www.instagram.com/p/CFguA79HuIT/?igshid=13cntj6nmzkyc

[techandtechie]

Reposted from @reactgraphqlacademy 🚨Join our next #Webinar 🚨⠀ PART 2. JavaScript Architecture For Business Optimization⠀ Date: August 20th⠀ Time: 10:00 - 11:00 CEST⠀ Speaker: Alex Lobera⠀ ⠀ .⠀ RSVP: LINK IN @reactgraphqlacademy BIO⠀ .⠀ .⠀ .⠀ #coding #techlife #coders #reactjs #graphQL #reactdev #reactnative #devlife #techdevelopment #devteam #devtech #reactdeveloper #lovecode #lovecoding #teachcode #learncode #learncoding #techtraining #techandtechie #techcommunity #edtech #edtechteachers #edtechchat #techbootcamp #bootcamp #codingbootcamp #reactjsacademy #reactjsbootcamp #londontech https://www.instagram.com/p/CD_1f3sJSHL/?igshid=ad0js7waey43

[depple]

*React Js + Node.Js Development Webinar*. HURRY UP DON'T THINK, LET'S DO IT. *Registration Will Start Soon Within 2 Days* FOR GET FREE *E-CERTIFICATE* *MUST DO 2 THINGS* 1 REGISTRATION 2. ATTEND WEBINAR. This Webinar will conduct on *17-05-2020 at 10:00 am*. Register on Below Link 👇👇👇 *http://depple.in/admission.aspx* And Select Course *YouTube Free Webinar* Then Fill Form. #depple #depplesoft #reactjs #react #reactjsdeveloper #reactjsdevelopment #reactjsacademy #reactjsconf #webinars #webinar #tutorial #training #tranding #trandding #projecttraining #programmer #development #developer #reactjstraining #reactnative #himatnagar #prantij #salal (at Depple) https://www.instagram.com/p/CABDPQLBl48/?igshid=v8ym66ju0rh1

[annabelledarcie]

How Do I Develop A Cloud Meeting App Like Zoom?

While businesses suffered during the Covid-19 pandemic, Zoom’s video conferencing platform witnessed a massive spike in usage and it became a household name throughout the world.

It offers different solutions like video chatting, audio chatting, cloud storage, cloud calling, and hassle-free organizing of webinars and meetings. Zoom also offers customized solutions for industries like education, healthcare, fitness, and government agencies. The growth of Zoom has been spectacular having earned $622.7 million in revenue in 2020 and a whopping market capitalization of $91.98 billion.

Entrepreneurs aiming to develop a state-of-the-art video conferencing app like zoom have to possess good knowledge of the current industry trends, formulate a solid business strategy, and be ready to incur a huge investment and time.

The multi-pronged procedure to implement for creating an app like Zoom is

Understanding the business goals - to achieve over a period and the operational scope.

Conducting in-depth market research - to know the tactics followed by competitors who are also in the video conferencing industry.

Finalizing the USP of the app like Zoom - to distinguish it from the other rivals in the market.

Preparing a comprehensive list of features and functionalities - to include in the Videoconferencing app like Zoom.

Assembling the required tech stack - like JavaScript, Kotlin, Flutter, WebRTC, CSS, ReactJS, AngularJS, Node.js, and Vue.js.

Hiring proficient and qualified team members - like project managers, mobile app developers, marketing experts, finance managers, QA testers, technical support executives, UI/UX designers, front-end and back-end developers, and software developers.

Setting up the friendly UI/UX design - which contains comfortable tools and widgets.

Developing a robust backend - that takes care of database management and ensures a high level of efficiency in the operational server.

Adding the basic features - like screen-sharing of content, video call, Zoom meetings, Zoom webinars, Zoom Phone, transcribing, recording, whiteboard, filters, a mute option, and private messaging.

Including advanced features - such as end-to-end data encryption, blurring of the background, generation of analytical reports, closed captioning, conducting of public polls, and organizing Q&A sessions.

Rigorously testing the app - in terms of performance and speed to remove technical bugs, operational glitches, and other vulnerabilities.

Launching an app like Zoom officially in the market - to grab the attention of a global audience.

Offering additional services - like technical support, maintenance, and the provision of software updates.

Final Thoughts

A Video conferencing app like zoom will help the entrepreneur to capture a strong position in the market attracting millions of individuals and businesses who will use it daily. It ensures a consistent inflow of revenue leading to a greater return on investment.

[t-baba]

🚀 Masonry layout with CSS grids

Frontend 

 Focus

#465 — November 4, 2020 | Read on the web

Native CSS Masonry Layout In CSS Grid — There is now a specification for native CSS masonry-style layouts (think similar to how Pinterest lays things out), as part of the 'Grid Layout' spec. In this article, Rachel Andrew explains how it works with the help of a couple of demos you can try out in Firefox Nightly.

Smashing Magazine

Chasing the Pixel-Perfect Dream — This term isn’t anywhere near as ubiquitous as it once was, but for times where design duplication is demanded, Josh asks how we can now go about it, how realistic such a request is, and shares some tricks to help us “scooch a bit closer to pixel-perfection”.

Joshua Comeau

Webinar: Transforming Your Application's Analytics in 30 Minutes — Watch this webinar to learn how using a well-architected analytics development environment, with modern capabilities such as data and visual authoring, can fully transform an application in just 30 minutes.

Logi Analytics sponsor

Comparing Various Ways to Hide Things in CSS — There are many ways to ‘hide’ things in CSS, and each come their own pros and cons. Marko Ilic reviews each technique and caps things off with a summary to help you decide which to use and when.

CSS-Tricks

In Defense of Tables and Floats in Modern Day Development — If you find yourself considering tables or floats the author makes the case for using them “with confidence”, so long as “the situation aligns with their intended use”.

John Macpherson

MDN Web Docs: Editorial Strategy and Community Participation — An update on MDN including some details on their move from a Wiki approach with a MySQL database for content, to a Jamstack approach that allows contributions via Git. It does not say which SSG, for those curious, but other recently released Mozilla sites have already been written in 11ty.

Chris Mills

⚡️ Quick bits:

Support for <input type="date"> is finally in the latest Safari beta.

The Brave browser now has over 20 million users (up from 8.7m this time last year).

Handy little contextual icons showing the effect of a stated flexbox alignment rule are coming to Chrome - tap through to see the examples.

This repo is worth a star - it's filled with references and resources to aid your frontend dev.. including us(!) 😄

💻 Jobs

Senior Web Developer (Node/ReactJS) - Remote — Millions get inspired and plan adventures with our apps. To help us make komoot.com the place to go to plan outdoor adventures, we’re looking for a one of a kind Web Developer to join our team.

Komoot

Find a Job Through Vettery — Create a profile on Vettery to connect with hiring managers at startups and Fortune 500 companies. It's free for job-seekers.

Vettery

🧑‍💻 Looking to share your job listing in Frontend Focus? There's more info here.

📙 Tutorials, Articles & Opinion

Comparing Static Site Generator Build Times — This is an interesting post, especially given that build speed can become a major concern for large sites and because various SSGs make claims of build speed part of their “pitch.” I love how the author lays out his hypotheses first and compares them with the result. I would say the results more or less aligned with expectations.

Sean C Davis

Micro Frontends Pattern Comparison — Comparing build-time integration, server-side integration, run-time integration via iframes, and run-time integration via script.

Florian Rappl

What Is This Gemini Thing Anyway, & Why Am I Excited About It? — Gemini is a network protocol for exchanging particularly lightweight hypertext documents, but no HTML is involved. Imagine if the Web were forced to be lightweight. That's what Gemini is and it's quite fun to play with.

Drew DeVault

Browsers Don’t Have Feelings—Measure What Matters to Users — Page load time isn't enough, users care about perceived performance. Track interactivity metrics and build for impact.

New Relic sponsor

Getting Audio Visualizations Working with Web Audio API — A developer works through the trickiness of cross-browser issues around the Web Audio API and comes up with a neat visualization for his audio chat system.

Dwayne Harris

If Not Single Page Apps (SPAs) Then What? — If you’re not a fan of the SPA approach, what else can you do? Turns out there are numerous modern alternatives from Stimulus to RedwoodJS.

Tom MacWright

What Can Web Designers Do With Their Unused Designs? — Four ways to repurpose your unused designs and give them new life.

Suzanne Scacca

Grab Your User's Attention with The :focus-within CSS Selector — A neat trick, using this selector to style the parent of a focused element.

Vitor Paladini

▶  Distorted Infinite WebGL Slider with Pixi.js — Learn how to recreate the the infinite scrollable image slider as seen on the Lamadone Studio site using Pixi.js.

Yuriy Artyukh

Running Front-End Experiments

LaunchDarkly sponsor

Designing User-Friendly Data Tables

Meredith Meller

Tailwind Versus BEM: The Benefits and Drawbacks of Both

Eric Bailey

🔧 Code, Tools and Resources

Photo-Realistic Glass in the Browser — Ok, so this WebGL/Three.js demo may well bring your browser to a crawl, but I'd say the effect is well worth seeing. Related repo here.

Domenico Bruzzese

CSS Spider: The Fastest and Easiest Way to Spy (Check, Copy and Edit) CSS of Any Site — Chrome only for now, but a neat way to really quickly view the CSS of any element you hover over.

FresaLabs

Graphery SVG: A Library for SVG Creation and Management — This well-documented library is good for creating and manipulating SVG in JavaScript. Offers a simple API — that’s said to be very close to the native structure of SVG.

Graphery

Adobe XD for Visual Studio Code — The Adobe XD design system now extends into the Visual Studio world for enhanced developer collaboration.

Adobe

Meraki UI: Beautiful Tailwind CSS Components That Support RTL Languages — You don’t often see a CSS framework advertised as supporting RTL, so that’s somewhat new. Includes 43 components in all, based on Flexbox and Grid.

khatab Wedaa & Mosab Ibrahim

A HTML and CSS Coin Flip Donate Button — This neat little animation, complete with randomized flipping, has no 3D elements, just 2D elements and some clever math to give the illusion of a 3D coin.

Cooper Goeke codepen

ngx-bootstrap: Fast and Reliable Bootstrap Widgets in Angular

Valor Software

by via Frontend Focus https://ift.tt/38aI8Nz

[dorothydelgadillo]

How To Build A Real-Time App With GraphQL Subscriptions On Postgres

How To Build A Real-Time App With GraphQL Subscriptions On Postgres

Sandip Devarkonda

2018-12-10T14:00:23+01:002018-12-10T13:04:58+00:00

In this article, we’ll take a look at the challenges involved in building real-time applications and how emerging tooling is addressing them with elegant solutions that are easy to reason about. To do this, we’ll build a real-time polling app (like a Twitter poll with real-time overall stats) just by using Postgres, GraphQL, React and no backend code!

The primary focus will be on setting up the backend (deploying the ready-to-use tools, schema modeling), and aspects of frontend integration with GraphQL and less on UI/UX of the frontend (some knowledge of ReactJS will help). The tutorial section will take a paint-by-numbers approach, so we’ll just clone a GitHub repo for the schema modeling, and the UI and tweak it, instead of building the entire app from scratch.

All Things GraphQL

Do you know everything you need to know about GraphQL? If you have your doubts, Eric Baer has you covered with a detailed guide on its origins, its drawbacks and the basics of how to work with it. Read article →

Before you continue reading this article, I’d like to mention that a working knowledge of the following technologies (or substitutes) are beneficial:

ReactJS This can be replaced with any frontend framework, Android or IOS by following the client library documentation.

Postgres You can work with other databases but with different tools, the principles outlined in this post will still apply.

You can also adapt this tutorial context for other real-time apps very easily.

A demonstration of the features in the polling app that we’ll be building. (Large preview)

As illustrated by the accompanying GraphQL payload at the bottom, there are three major features that we need to implement:

Fetch the poll question and a list of options (top left).

Allow a user to vote for a given poll question (the “Vote” button).

Fetch results of the poll in real-time and display them in a bar graph (top right; we can gloss over the feature to fetch a list of currently online users as it’s an exact replica of this use case).

Front-end is messy and complicated these days. That's why we publish articles, printed books and webinars with useful techniques to improve your work. Even better: Smashing Membership with a growing selection of front-end & UX goodies. So you get your work done, better and faster.

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Challenges With Building Real-Time Apps

Building real-time apps (especially as a frontend developer or someone who’s recently made a transition to becoming a fullstack developer), is a hard engineering problem to solve. This is generally how contemporary real-time apps work (in the context of our example app):

The frontend updates a database with some information; A user’s vote is sent to the backend, i.e. poll/option and user information (user_id, option_id).

The first update triggers another service that aggregates the poll data to render an output that is relayed back to the app in real-time (every time a new vote is cast by anyone; if this done efficiently, only the updated poll’s data is processed and only those clients that have subscribed to this poll are updated):

Vote data is first processed by an register_vote service (assume that some validation happens here) that triggers a poll_results service.

Real-time aggregated poll data is relayed by the poll_results service to the frontend for displaying overall statistics.

A poll app designed traditionally

This model is derived from a traditional API-building approach, and consequently has similar problems:

Any of the sequential steps could go wrong, leaving the UX hanging and affecting other independent operations.

Requires a lot of effort on the API layer as it’s a single point of contact for the frontend app, that interacts with multiple services. It also needs to implement a websockets-based real-time API — there is no universal standard for this and therefore sees limited support for automation in tools.

The frontend app is required to add the necessary plumbing to consume the real-time API and may also have to solve the data consistency problem typically seen in real-time apps (less important in our chosen example, but critical in ordering messages in a real-time chat app).

Many implementations resort to using additional non-relational databases on the server-side (Firebase, etc.) for easy real-time API support.

Let’s take a look at how GraphQL and associated tooling address these challenges.

What Is GraphQL?

GraphQL is a specification for a query language for APIs, and a server-side runtime for executing queries. This specification was developed by Facebook to accelerate app development and provide a standardized, database-agnostic data access format. Any specification-compliant GraphQL server must support the following:

Queries for reads A request type for requesting nested data from a data source (which can be either one or a combination of a database, a REST API or another GraphQL schema/server).

Mutations for writes A request type for writing/relaying data into the aforementioned data sources.

Subscriptions for live-queries A request type for clients to subscribe to real-time updates.

GraphQL also uses a typed schema. The ecosystem has plenty of tools that help you identify errors at dev/compile time which results in fewer runtime bugs.

Here’s why GraphQL is great for real-time apps:

Live-queries (subscriptions) are an implicit part of the GraphQL specification. Any GraphQL system has to have native real-time API capabilities.

A standard spec for real-time queries has consolidated community efforts around client-side tooling, resulting in a very intuitive way of integrating with GraphQL APIs.

GraphQL and a combination of open-source tooling for database events and serverless/cloud functions offer a great substrate for building cloud-native applications with asynchronous business logic and real-time features that are easy to build and manage. This new paradigm also results in great user and developer experience.

In the rest of this article, I will use open-source tools to build an app based on this architecture diagram:

A poll app designed with GraphQL

Building A Real-Time Poll/Voting App

With that introduction to GraphQL, let’s get back to building the polling app as described in the first section.

The three features (or stories highlighted) have been chosen to demonstrate the different GraphQL requests types that our app will make:

Query Fetch the poll question and its options.

Mutation Let a user cast a vote.

Subscription Display a real-time dashboard for poll results.

GraphQL request types in the poll app (Large preview)

Prerequisites

A Heroku account (use the free tier, no credit card required) To deploy a GraphQL backend (see next point below) and a Postgres instance.

Hasura GraphQL Engine (free, open-source)/>A ready-to-use GraphQL server on Postgres.

Apollo Client (free, open-source SDK) For easily integrating clients apps with a GraphQL server.

npm (free, open-source package manager) To run our React app.

Deploying The Database And A GraphQL Backend

We will deploy an instance each of Postgres and GraphQL Engine on Heroku’s free tier. We can use a nifty Heroku button to do this with a single click.

Heroku button

Note: You can also follow this link or search for documentation Hasura GraphQL deployment for Heroku (or other platforms).

Deploying Postgres and GraphQL Engine to Heroku’s free tier (Large preview)

You will not need any additional configuration, and you can just click on the “Deploy app” button. Once the deployment is complete, make a note of the app URL:

<app-name>.herokuapp.com

For example, in the screenshot above, it would be:

hge-realtime-app-tutorial.herokuapp.com

What we’ve done so far is deploy an instance of Postgres (as an add-on in Heroku parlance) and an instance of GraphQL Engine that is configured to use this Postgres instance. As a result of doing so, we now have a ready-to-use GraphQL API but, since we don’t have any tables or data in our database, this is not useful yet. So, let’s address this immediately.

Modeling the database schema

The following schema diagram captures a simple relational database schema for our poll app:

Schema design for the poll app. (Large preview)

As you can see, the schema is a simple, normalized one that leverages foreign-key constraints. It is these constraints that are interpreted by the GraphQL Engine as 1:1 or 1:many relationships (e.g. poll:options is a 1: many relationship since each poll will have more than 1 option that are linked by the foreign key constraint between the id column of the poll table and the poll_id column in the option table). Related data can be modelled as a graph and can thus power a GraphQL API. This is precisely what the GraphQL Engine does.

Based on the above, we’ll have to create the following tables and constraints to model our schema:

Poll A table to capture the poll question.

Option Options for each poll.

Vote To record a user’s vote.

Foreign-key constraint between the following fields (table : column):

option : poll_id → poll : id

vote : poll_id → poll : id

vote : created_by_user_id → user : id

Now that we have our schema design, let’s implement it in our Postgres database. To instantly bring this schema up, here’s what we’ll do:

Download the GraphQL Engine CLI.

Clone this repo:

$ git clone clone https://github.com/hasura/graphql-engine $ cd graphql-engine/community/examples/realtime-poll

Go to hasura/ and edit config.yaml:

endpoint: https://<app-name>.herokuapp.com

Apply the migrations using the CLI, from inside the project directory (that you just downloaded by cloning):

$ hasura migrate apply

That’s it for the backend. You can now open the GraphQL Engine console and check that all the tables are present (the console is available at https://<app-name>.herokuapp.com/console).

Note: You could also have used the console to implement the schema by creating individual tables and then adding constraints using a UI. Using the built-in support for migrations in GraphQL Engine is just a convenient option that was available because our sample repo has migrations for bringing up the required tables and configuring relationships/constraints (this is also highly recommended regardless of whether you are building a hobby project or a production-ready app).

Integrating The Frontend React App With The GraphQL Backend

The frontend in this tutorial is a simple app that shows poll question, the option to vote and the aggregated poll results in one place. As I mentioned earlier, we’ll first focus on running this app so you get the instant gratification of using our recently deployed GraphQL API , see how the GraphQL concepts we looked at earlier in this article power the different use-cases of such an app, and then explore how the GraphQL integration works under the hood.

NOTE: If you are new to ReactJS, you may want to check out some of these articles. We won’t be getting into the details of the React part of the app, and instead, will focus more on the GraphQL aspects of the app. You can refer to the source code in the repo for any details of how the React app has been built.

Configuring The Frontend App

In the repo cloned in the previous section, edit HASURA_GRAPHQL_ENGINE_HOSTNAME in the src/apollo.js file (inside the /community/examples/realtime-poll folder) and set it to the Heroku app URL from above:

export const HASURA_GRAPHQL_ENGINE_HOSTNAME = 'random-string-123.herokuapp.com';

Go to the root of the repository/app-folder (/realtime-poll/) and use npm to install the prequisite modules and then run the app:

$ npm install $ npm start

Screenshot of the live poll app (Large preview)

You should be able to play around with the app now. Go ahead and vote as many times as you want, you’ll notice the results changing in real time. In fact, if you set up another instance of this UI and point it to the same backend, you’ll be able to see results aggregated across all the instances.

So, how does this app use GraphQL? Read on.

Behind The Scenes: GraphQL

In this section, we’ll explore the GraphQL features powering the app, followed by a demonstration of the ease of integration in the next one.

The Poll Component And The Aggregated Results Graph

The poll component on the top left that fetches a poll with all of its options and captures a user’s vote in the database. Both of these operations are done using the GraphQL API. For fetching a poll’s details, we make a query (remember this from the GraphQL introduction?):

query { poll { id question options { id text } } }

Using the Mutation component from react-apollo, we can wire up the mutation to a HTML form such that the mutation is executed using variables optionId and userId when the form is submitted:

mutation vote($optionId: uuid!, $userId: uuid!) { insert_vote(objects: [{option_id: $optionId, created_by_user_id: $userId}]) { returning { id } } }

To show the poll results, we need to derive the count of votes per option from the data in vote table. We can create a Postgres View and track it using GraphQL Engine to make this derived data available over GraphQL.

CREATE VIEW poll_results AS SELECT poll.id AS poll_id, o.option_id, count(*) AS votes FROM (( SELECT vote.option_id, option.poll_id, option.text FROM ( vote LEFT JOIN public.option ON ((option.id = vote.option_id)))) o LEFT JOIN poll ON ((poll.id = o.poll_id))) GROUP BY poll.question, o.option_id, poll.id;

The poll_results view joins data from vote and poll tables to provide an aggregate count of number of votes per each option.

Using GraphQL Subscriptions over this view, react-google-charts and the subscription component from react-apollo, we can wire up a reactive chart which updates in realtime when a new vote happens from any client.

subscription getResult($pollId: uuid!) { poll_results(where: {poll_id: {_eq: $pollId}}) { option { id text } votes } }

GraphQL API Integration

As I mentioned earlier, I used Apollo Client, an open-source SDK to integrate a ReactJS app with the GraphQL backend. Apollo Client is analogous to any HTTP client library like requests for python, the standard http module for JavaScript, and so on. It encapsulates the details of making an HTTP request (in this case POST requests). It uses the configuration (specified in src/apollo.js) to make query/mutation/subscription requests (specified in src/GraphQL.jsx with the option to use variables that can be dynamically substituted in the JavaScript code of your REACT app) to a GraphQL endpoint. It also leverages the typed schema behind the GraphQL endpoint to provide compile/dev time validation for the aforementioned requests. Let’s see just how easy it is for a client app to make a live-query (subscription) request to the GraphQL API.

Configuring The SDK

The Apollo Client SDK needs to be pointed at a GraphQL server, so it can automatically handle the boilerplate code typically needed for such an integration. So, this is exactly what we did when we modified src/apollo.js when setting up the frontend app.

Making A GraphQL Subscription Request (Live-Query)

Define the subscription we looked at in the previous section in the src/GraphQL.jsx file:

const SUBSCRIPTION_RESULT = ` subscription getResult($pollId: uuid!) { poll_results ( order_by: option_id_desc, where: { poll_id: {_eq: $pollId} } ) { option_id option { id text } votes } }`;

We’ll use this definition to wire up our React component:

export const Result = (pollId) => ( <Subscription subscription={gql`${SUBSCRIPTION_RESULT}`} variables={pollId}> {({ loading, error, data }) => { if (loading) return

Loading...</p>; if (error) return

Error :</p>; return ( <div> <div> {renderChart(data)} </div> </div> ); }} </Subscription> )

One thing to note here is that the above subscription could also have been a query. Merely replacing one keyword for another gives us a “live-query”, and that’s all it takes for the Apollo Client SDK to hook this real-time API with your app. Every time there’s a new dataset from our live-query, the SDK triggers a re-render of our chart with this updated data (using the renderChart(data) call). That’s it. It really is that simple!

Final Thoughts

In three simple steps (creating a GraphQL backend, modeling the app schema, and integrating the frontend with the GraphQL API), you can quickly wire-up a fully-functional real-time app, without getting mired in unnecessary details such as setting up a websocket connection. That right there is the power of community tooling backing an abstraction like GraphQL.

If you’ve found this interesting and want to explore GraphQL further for your next side project or production app, here are some factors you may want to use for building your GraphQL toolchain:

Performance & Scalability GraphQL is meant to be consumed directly by frontend apps (it’s no better than an ORM in the backend; real productivity benefits come from doing this). So your tooling needs to be smart about efficiently using database connections and should be able scale effortlessly.

Security It follows from above that a mature role-based access-control system is needed to authorize access to data.

Automation If you are new to the GraphQL ecosystem, handwriting a GraphQL schema and implementing a GraphQL server may seem like daunting tasks. Maximize the automation from your tooling so you can focus on the important stuff like building user-centric frontend features.

Architecture/>As trivial as the above efforts seem like, a production-grade app’s backend architecture may involve advanced GraphQL concepts like schema-stitching, etc. Moreover, the ability to easily generate/consume real-time APIs opens up the possibility of building asynchronous, reactive apps that are resilient and inherently scalable. Therefore, it’s critical to evaluate how GraphQL tooling can streamline your architecture.

Related Resources

You can check out a live version of the app over here.

The complete source code is available on GitHub.

If you’d like to explore the database schema and run test GraphQL queries, you can do so over here.

(rb, ra, yk, il)

[alanlcole]

Online Webinar SharePoint Framework with ReactJS -Part2

This webinar in continuation with Part-1. Here, we are going to learn react life cycle in SPFX and usage of Office UI Fabric in SPFX source https://www.c-sharpcorner.com/article/online-webinar-sharepoint-framework-with-reactjs-part2/ from C Sharp Corner https://ift.tt/2rFrVdd

[carlajsmith]

Online Webinar SharePoint Framework with ReactJS -Part2

This webinar in continuation with Part-1. Here, we are going to learn react life cycle in SPFX and usage of Office UI Fabric in SPFX from C-Sharpcorner Latest Content https://ift.tt/2wCNq3o

from C Sharp Corner https://csharpcorner.tumblr.com/post/173885805456

[csharpcorner]

Online Webinar SharePoint Framework with ReactJS -Part2

This webinar in continuation with Part-1. Here, we are going to learn react life cycle in SPFX and usage of Office UI Fabric in SPFX from C-Sharpcorner Latest Content https://ift.tt/2wCNq3o

[depple]

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Date 03-05-2020 Morning 10:00 AM to 11:00AM Live Webinar with LIVE CHAT FOR QUESTIONS AND ANSWER (Angular Webinar Part 1) Angular + Node JS Webinar For Beginners Step By Step in Hindi https://youtu.be/__0-BLRtHQ8 Please Provide Feedback After Webinar End This Link Open After Webinar http://depple.in/Feedback.aspx PLEASE LIKE VIDEO , Please SUBSCRIBE CHANNEL and Click On Bell Icon For New Update of Video , COMMENTS AND SHARE MY VIDEO...!!! :)-: Please Like, Share and Subscribe My Channel. DEPPLE, PRIYANK PATEL (9409544924) (http://depple.in/) Facebook : https://facebook.in/depplesoft #depple #depplesoft #angular #angularjs #node #nodejsdeveloper #typescript #reactjs #tutorial #webinars #webinar #tutorial #himatnagar #salal #himatnagar #prantij #stayhome #stayathome #staysafe (at Depple) https://www.instagram.com/p/B_tMxckhB9E/?igshid=9j1qou67lvxd

[depple]

Date 03-05-2020 Morning 10:00 AM to 11:00AM Live Webinar with LIVE CHAT FOR QUESTIONS AND ANSWER (Angular Webinar Part 1) Angular + Node JS Webinar For Beginners Step By Step in Hindi https://youtu.be/__0-BLRtHQ8 Please Provide Feedback After Webinar End This Link Open After Webinar http://depple.in/Feedback.aspx PLEASE LIKE VIDEO , Please SUBSCRIBE CHANNEL and Click On Bell Icon For New Update of Video , COMMENTS AND SHARE MY VIDEO...!!! :)-: Please Like, Share and Subscribe My Channel. DEPPLE, PRIYANK PATEL (9409544924) (http://depple.in/) Facebook : https://facebook.in/depplesoft #depple #depplesoft #angular #angularjs #node #nodejsdeveloper #typescript #reactjs #tutorial #webinars #webinar #tutorial #himatnagar #salal #himatnagar #prantij #stayhome #stayathome #staysafe (at Depple) https://www.instagram.com/p/B_tMhh5B9ve/?igshid=1symmg8uy25vw