Do not create multi-accounts, you will be blocked! For more information about rules, limits, and more, visit the, Help page.
Found a dead link? report button!

Reply to thread

Message: <blockquote data-quote="Brilliant" data-source="post: 230" data-attributes="member: 4">Handling repeated code blocks efficiently in JavaScript is important for maintainability and performance. If you are encountering repetitive blocks of code, consider these approaches to streamline your code:---1. Use FunctionsEncapsulate repeated logic in a reusable function. This eliminates duplication and makes it easier to update or modify the behavior in one place.Example:Before:[CODE=javascript]document.getElementById('btn1').addEventListener('click', () => {    console.log('Button 1 clicked');    alert('Action for Button 1');});document.getElementById('btn2').addEventListener('click', () => {    console.log('Button 2 clicked');    alert('Action for Button 2');});[/CODE]After:[CODE=javascript]function handleButtonClick(buttonId, message) {    console.log(`${buttonId} clicked`);    alert(message);}document.getElementById('btn1').addEventListener('click', () => handleButtonClick('btn1', 'Action for Button 1'));document.getElementById('btn2').addEventListener('click', () => handleButtonClick('btn2', 'Action for Button 2'));---[/CODE]2. Use LoopsIf your repeated code involves similar operations on multiple elements, use a loop (e.g., for, forEach, or map) to dynamically bind logic.Example:Before:[CODE=javascript]document.getElementById('input1').addEventListener('change', () => console.log('Input 1 changed'));document.getElementById('input2').addEventListener('change', () => console.log('Input 2 changed'));document.getElementById('input3').addEventListener('change', () => console.log('Input 3 changed'));[/CODE]After:[CODE=javascript]const inputs = document.querySelectorAll('input');inputs.forEach((input, index) => {    input.addEventListener('change', () => console.log(`Input ${index + 1} changed`));});---[/CODE]3. Event DelegationInstead of attaching event listeners to multiple elements, use event delegation to attach a single listener to a parent element and handle events based on the target.Example:Before:[CODE=javascript]document.getElementById('item1').addEventListener('click', () => console.log('Item 1 clicked'));document.getElementById('item2').addEventListener('click', () => console.log('Item 2 clicked'));[/CODE]After:[CODE=javascript]document.getElementById('container').addEventListener('click', (event) => {    if (event.target.matches('.item')) {        console.log(`${event.target.id} clicked`);    }});---[/CODE]4. Use Higher-Order FunctionsFor more complex scenarios, use higher-order functions that accept callbacks to encapsulate varying behavior.Example:[CODE=javascript]function executeOnElements(selector, callback) {    document.querySelectorAll(selector).forEach(callback);}executeOnElements('.buttons', (button) => {    button.addEventListener('click', () => {        console.log(`${button.id} clicked`);    });});---[/CODE]5. Abstract Repeated Code into Classes or ModulesIf your logic involves reusable components or repeated behavior across an application, use classes or modules for better scalability.Example:[CODE=javascript]class ButtonHandler {    constructor(buttonSelector) {        this.buttons = document.querySelectorAll(buttonSelector);        this.init();    }    init() {        this.buttons.forEach((button) => {            button.addEventListener('click', () => this.handleClick(button));        });    }    handleClick(button) {        console.log(`${button.id} clicked`);    }}new ButtonHandler('.buttons');---[/CODE]6. Template Literals for Repeating HTMLIf you’re dynamically generating similar HTML blocks, use template literals for better readability and fewer repetitions.Example:Before:[CODE=javascript]document.body.innerHTML += '<div class="item">Item 1</div>';document.body.innerHTML += '<div class="item">Item 2</div>';document.body.innerHTML += '<div class="item">Item 3</div>';[/CODE]After:[CODE=javascript]const items = [1, 2, 3];document.body.innerHTML += items.map((i) => `<div class="item">Item ${i}</div>`).join('');---[/CODE]7. Leverage LibrariesIf your project allows, use JavaScript libraries like Lodash to simplify repetitive tasks like iterations, filtering, or mapping.---By combining these techniques, you can eliminate redundancy, reduce errors, and make your JavaScript code more maintainable.</blockquote>