#reactJS

[praxis-app]

join the praxis discord - sign up - github

[codingquill]

JavaScript Fundamentals

I have recently completed a course that extensively covered the foundational principles of JavaScript, and I'm here to provide you with a concise overview. This post will enable you to grasp the fundamental concepts without the need to enroll in the course.

Prerequisites: Fundamental HTML Comprehension

Before delving into JavaScript, it is imperative to possess a basic understanding of HTML. Knowledge of CSS, while beneficial, is not mandatory, as it primarily pertains to the visual aspects of web pages.

Manipulating HTML Text with JavaScript

When it comes to modifying text using JavaScript, the innerHTML function is the go-to tool. Let's break down the process step by step:

Initiate the process by selecting the HTML element whose text you intend to modify. This selection can be accomplished by employing various DOM (Document Object Model) element selection methods offered by JavaScript ( I'll talk about them in a second )

Optionally, you can store the selected element in a variable (we'll get into variables shortly).

Employ the innerHTML function to substitute the existing text with your desired content.

Element Selection: IDs or Classes

You have the opportunity to enhance your element selection by assigning either an ID or a class:

Assigning an ID:

To uniquely identify an element, the .getElementById() function is your go-to choice. Here's an example in HTML and JavaScript:

HTML:

<button id="btnSearch">Search</button>

JavaScript:

document.getElementById("btnSearch").innerHTML = "Not working";

This code snippet will alter the text within the button from "Search" to "Not working."

Assigning a Class:

For broader selections of elements, you can assign a class and use the .querySelector() function. Keep in mind that this method can select multiple elements, in contrast to .getElementById(), which typically focuses on a single element and is more commonly used.

Variables

Let's keep it simple: What's a variable? Well, think of it as a container where you can put different things—these things could be numbers, words, characters, or even true/false values. These various types of stuff that you can store in a variable are called DATA TYPES.

Now, some programming languages are pretty strict about mentioning these data types. Take C and C++, for instance; they're what we call "Typed" languages, and they really care about knowing the data type.

But here's where JavaScript stands out: When you create a variable in JavaScript, you don't have to specify its data type or anything like that. JavaScript is pretty laid-back when it comes to data types.

So, how do you make a variable in JavaScript?

There are three main keywords you need to know: var, let, and const.

But if you're just starting out, here's what you need to know :

const: Use this when you want your variable to stay the same, not change. It's like a constant, as the name suggests.

var and let: These are the ones you use when you're planning to change the value stored in the variable as your program runs.

Note that var is rarely used nowadays

Check this out:

let Variable1 = 3; var Variable2 = "This is a string"; const Variable3 = true;

Notice how we can store all sorts of stuff without worrying about declaring their types in JavaScript. It's one of the reasons JavaScript is a popular choice for beginners.

Arrays

Arrays are a basically just a group of variables stored in one container ( A container is what ? a variable , So an array is also just a variable ) , now again since JavaScript is easy with datatypes it is not considered an error to store variables of different datatypeslet

for example :

myArray = [1 , 2, 4 , "Name"];

Objects in JavaScript

Objects play a significant role, especially in the world of OOP : object-oriented programming (which we'll talk about in another post). For now, let's focus on understanding what objects are and how they mirror real-world objects.

In our everyday world, objects possess characteristics or properties. Take a car, for instance; it boasts attributes like its color, speed rate, and make.

So, how do we represent a car in JavaScript? A regular variable won't quite cut it, and neither will an array. The answer lies in using an object.

const Car = { color: "red", speedRate: "200km", make: "Range Rover" };

In this example, we've encapsulated the car's properties within an object called Car. This structure is not only intuitive but also aligns with how real-world objects are conceptualized and represented in JavaScript.

Variable Scope

There are three variable scopes : global scope, local scope, and function scope. Let's break it down in plain terms.

Global Scope: Think of global scope as the wild west of variables. When you declare a variable here, it's like planting a flag that says, "I'm available everywhere in the code!" No need for any special enclosures or curly braces.

Local Scope: Picture local scope as a cozy room with its own rules. When you create a variable inside a pair of curly braces, like this:

//Not here { const Variable1 = true; //Variable1 can only be used here } //Neither here

Variable1 becomes a room-bound secret. You can't use it anywhere else in the code

Function Scope: When you declare a variable inside a function (don't worry, we'll cover functions soon), it's a member of an exclusive group. This means you can only name-drop it within that function. .

So, variable scope is all about where you place your variables and where they're allowed to be used.

Adding in user input

To capture user input in JavaScript, you can use various methods and techniques depending on the context, such as web forms, text fields, or command-line interfaces.We’ll only talk for now about HTML forms

HTML Forms:

You can create HTML forms using the &lt;;form> element and capture user input using various input elements like text fields, radio buttons, checkboxes, and more.

JavaScript can then be used to access and process the user's input.

Functions in JavaScript

Think of a function as a helpful individual with a specific task. Whenever you need that task performed in your code, you simply call upon this capable "person" to get the job done.

Declaring a Function: Declaring a function is straightforward. You define it like this:

function functionName() { // The code that defines what the function does goes here }

Then, when you need the function to carry out its task, you call it by name:

functionName();

Using Functions in HTML: Functions are often used in HTML to handle events. But what exactly is an event? It's when a user interacts with something on a web page, like clicking a button, following a link, or interacting with an image.

Event Handling: JavaScript helps us determine what should happen when a user interacts with elements on a webpage. Here's how you might use it:

HTML:

<button onclick="FunctionName()" id="btnEvent">Click me</button>

JavaScript:

function FunctionName() { var toHandle = document.getElementById("btnEvent"); // Once I've identified my button, I can specify how to handle the click event here }

In this example, when the user clicks the "Click me" button, the JavaScript function FunctionName() is called, and you can specify how to handle that event within the function.

Arrow functions : is a type of functions that was introduced in ES6, you can read more about it in the link below

If Statements

These simple constructs come into play in your code, no matter how advanced your projects become.

If Statements Demystified: Let's break it down. "If" is precisely what it sounds like: if something holds true, then do something. You define a condition within parentheses, and if that condition evaluates to true, the code enclosed in curly braces executes.

If statements are your go-to tool for handling various scenarios, including error management, addressing specific cases, and more.

Writing an If Statement:

if (Variable === "help") { console.log("Send help"); // The console.log() function outputs information to the console }

In this example, if the condition inside the parentheses (in this case, checking if the Variable is equal to "help") is true, the code within the curly braces gets executed.

Else and Else If Statements

Else: When the "if" condition is not met, the "else" part kicks in. It serves as a safety net, ensuring your program doesn't break and allowing you to specify what should happen in such cases.

Else If: Now, what if you need to check for a particular condition within a series of possibilities? That's where "else if" steps in. It allows you to examine and handle specific cases that require unique treatment.

Styling Elements with JavaScript

This is the beginner-friendly approach to changing the style of elements in JavaScript. It involves selecting an element using its ID or class, then making use of the .style.property method to set the desired styling property.

Example:

Let's say you have an HTML button with the ID "myButton," and you want to change its background color to red using JavaScript. Here's how you can do it:

HTML: <button id="myButton">Click me</button>

JavaScript:

// Select the button element by its ID const buttonElement = document.getElementById("myButton"); // Change the background color property buttonElement.style.backgroundColor = "red";

In this example, we first select the button element by its ID using document.getElementById("myButton"). Then, we use .style.backgroundColor to set the background color property of the button to "red." This straightforward approach allows you to dynamically change the style of HTML elements using JavaScript.

[why-ai]

[izicodes]

Mini React.js Tips #1 | Resources ✨

I thought why not share my React.js (JavaScript library) notes I made when I was studying! I will start from the very beginning with the basics and random notes I made along the way~!

Up first is what you'll need to know to start any basic simple React (+ Vite) project~! 💻

What you'll need:

node.js installed >> click

coding editor - I love Visual Studio Code >> click

basic knowledge of how to use the Terminal

What does the default React project look like?

Step-by-Step Guide

[ 1 ] Create a New Folder: The new folder on your computer e.g. in Desktop, Documents, wherever that will serve as the home for your entire React project.

[ 2 ] Open in your coding editor (will be using VSCode here): Launch Visual Studio Code and navigate to the newly created folder. I normally 'right-click > show more options > Open with Code' on the folder in the File Explorer (Windows).

[ 3 ] Access the Terminal: Open the integrated terminal in your coding editor. On VSCode, it's at the very top, and click 'New Terminal' and it should pop up at the bottom of the editor.

[ 4 ] Create the actual React project: Type the following command to initialize a new React project using Vite, a powerful build tool:

npm create vite@latest

[ 5 ] Name Your Project: Provide a name for your project when prompted.

[ 6 ] Select 'React' as the Framework: Navigate through the options using the arrow keys on your keyboard and choose 'React'.

[ 7 ] Choose JavaScript Variant: Opt for the 'JavaScript' variant when prompted. This is the programming language you'll be using for your React application.

[ 8 ] Navigate to Project Folder: Move into the newly created project folder using the following command:

cd [your project name]

[ 9 ] Install Dependencies: Execute the command below to install the necessary dependencies for your React project (it might take a while):

npm install

[ 10 ] Run the Development Server: Start your development server with the command (the 'Local' link):

npm run dev

[ 11 ] Preview Your Project: Open the link provided in your terminal in your web browser. You're now ready to witness your React project in action!

Congratulations! You've successfully created your first React default project! You can look around the project structure like the folders and files already created for you!

BroCode's 'React Full Course for Free' 2024 >> click

React Official Website >> click

Stay tuned for the other posts I will make on this series #mini react tips~!

[anndcodes]

another day, another cat

today i finished the homework for week 1 of the react course and i had to "recode" the weather app into react components and it was pretty cool.

have a good weekend!

[alycesutherland]

Finally got OAuth working!!!!

The war is over. Figured out the hard way that OAuth makes the routes for you <3

Now I can start coming up with models to store the data from users. If anyone has any ideas on how I should make those relationships with other data tables for songs and artists let me know. I’m going to reblog this post with some of my own ideas.

I also have a login page and dashboard with hard coded data to get a sense of what I want the backend to supply. Good progress! Will also reblog with pictures of that.

[kitkatcodes]

100 Days of Code - Day 6 ・゜゜・．

✧*6/28/2023*✧

finally added a much wanted feature to my todo app! ( ◡̀_◡́)ᕤ

!!!saving tasks in local storage!!!

⁽ᴵ ᵃˡˢᵒ ᵃᵈᵈᵉᵈ ᵃⁿ ᵃᵈᵈ ᵗᵃˢᵏ ᵇᵘᵗᵗᵒⁿ ᵇᵘᵗ ᵗʰᵃᵗˢ ⁿᵒᵗ ᵃˢ ⁱᵐᵖᵒʳᵗᵃⁿᵗ⁾

so when you refresh or close the page and come back to it your tasks still stay there wooooo ৻( •̀ ᗜ •́ ৻)

it still looks absolutely terrible but its one step forward!!

next steps/future features:

✧ delete task button ✧ rearrange tasks

. • ☆ . ° .• °:. *₊ ° . ☆ . • ☆ . ° .• °:. *₊ ° . ☆ . • ☆ . ° .• °:. *₊ ° . ☆

. • ☆ . ° .• °:. *₊ ° . ☆ . • ☆ . ° .• °:. *₊ ° . ☆ . • ☆ . ° .• °:. *₊ ° . ☆

[cosmogyros]

Someone on Quora asked the question "Why do developers use React.js instead of HTML, CSS, and Bootstrap?" and

um

one of the highest-voted answers was this:

I genuinely can't tell if it's a joke or not. I have so many questions:

Is this person... trying to channel Trump?

Why has no one else commented on this answer with some sort of observation about how weird it is? (the only comment is one suggesting Angular instead of React)

Just what?

What?

...what?

[praxis-app]

join praxis now - discord - github

[tiikiboo]

I'm a Web developer

Hello, my name is Bettina and i'm 27 years old. I live in Sweden 🇸🇪 but i'm born in Hungary 🇭🇺.

I'm currently studying web development focusing e-commerce. I've done it for a year now and i have one year left in school. I have not had my internship yet.

The languages i'm learning:

HTML

CSS

JavaScript, React.js, Node.js, expess.js,

MySQL, PHP.

I've even experience UX-design, web design, digital marketing, SEO and entrepreneurship. And i love talking about problem solving and accessibility 🪄🪲

Currently i'm developing wordpress with PHP, HTML and hierarchical CSS.

So, if you are into this stuff, especially wordpress and php, talk nerdy stuff with me! I would be so happy if i had more connections with people who are into this stuff, especially women. 🌸

My github:

My portfolio:

It is not done yet, i will update it soon 🫣🐢

🌦️ A weather app made in our Javascript course:

[blackjackkent]

Livecoding on Twitch!

Time to spend another Sunday afternoon coding! I'm doing some more work on a NextJS migration of the RPThreadTracker app; today we're figuring out more of the auth flow. Come hang out and say hi, bring some questions, or just chill and chat!

I offer free software development tutoring for new devs and pro-bono web development services for organizations working for progressive change. Visit http://www.blackjack-software.com/about for more information or ask me about it in my Twitch chat!

[fangirlinc]

Any MCR fans in software engineering/web dev?

I'm looking for mutuals who love to code and also love MCR. I wanna do a little project >:D also just want some buds to relate to.

[izicodes]

React.js Resources | Resources ✨

I made a React.js resources list for a friend and thought why not share it here!

Learning React.js Resources Notion Page = click/щелкнуть

React.js is basically like a one-up for the JavaScript programming language, so typically when you finish learning JavaScript you want to go on to learn React.js (or Angular, Vue.js etc) but React is one of the popular ones for modern companies~!

Heads up, some words are in Russian because ① the friend is Russian and ② I am learning Russian :p

[anndcodes]

first week of learning react, there's a lot of new and exciting things to learn; this time having yogurt instead of coffee because it is extremely hot where i live so i have zero energy to do anything, but still trying to keep up with my studies. (there's a cat behind the pic, it's this cute baby yoda).

i'm taking notes of the lessons im taking because everything is really new to me. what i've learned so far this week:

components

properties (props)

multiple components

how to use html/css with react

[nehadigitech]

Neha Digitech stands out as a leading platform, offering comprehensive education in digital marketing, Java, Javascript, Python, PHP, and reactjs. We provide step-by-step videos that are easy to understand and help you grow your skills in the digital world. With NehaTech, you can enhance your skills and learn with the latest technologies in this competitive world. For more visit: https://www.nehadigitech.com