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javascript_practice

JavaScript Learning Process

A structured approach to learning JavaScript, including essential topics, demos, and resources.

Learning Steps

  1. Basics of JavaScript

    • Syntax, variables, data types, and basic control structures.

  2. Functions

    • Declaration, expression, and arrow functions.

  3. Objects and Arrays

    • Creating and manipulating objects and arrays.

  4. DOM Manipulation

    • Selecting elements, modifying content, and handling events.

  5. Asynchronous JavaScript

    • Understanding callbacks, Promises, and async/await.

  6. Advanced Topics

    • ES6+ features, modules, error handling, and debugging.

Demos

1. Basics of JavaScript

let name = "Alice";
let age = 30;
if (age >= 18) {
    console.log(`${name} is an adult.`);
} else {
    console.log(`${name} is a minor.`);
}

2. Functions

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function greet(user) {
    return `Hello, ${user}!`;
}
const greetArrow = (user) => `Hello, ${user}!`;
console.log(greet("Alice"));
console.log(greetArrow("Bob"));

3. Objects and Arrays

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const person = {
    name: "Alice",
    age: 30,
    hobbies: ["reading", "traveling"]
};
console.log(person.name);
console.log(person.hobbies[0]);

const numbers = [1, 2, 3, 4, 5];
numbers.push(6);
console.log(numbers);

4. DOM Manipulation

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>DOM Manipulation</title>
</head>
<body>
    <h1 id="title">Hello World</h1>
    <button id="changeTitle">Change Title</button>
    <script>
        const button = document.getElementById("changeTitle");
        button.addEventListener("click", () => {
            document.getElementById("title").textContent = "Title Changed!";
        });
    </script>
</body>
</html>

5. Asynchronous JavaScript

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function fetchData() {
    return new Promise((resolve) => {
        setTimeout(() => {
            resolve("Data fetched!");
        }, 2000);
    });
}
async function getData() {
    const data = await fetchData();
    console.log(data);
}
getData();