JavaScript DOM lessons

JavaScript DOM examples

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Creating an elementAppending an elementRemoving an elementChanging an element’s text contentChanging an element’s HTML contentModifying an element’s attributesAccessing an element’s attributesAdding an event listener to an elementRemoving an event listener from an elementTraversing the DOM JavaScript DOM Examples Creating an element const newElement = document.createElement(‘div’); This code creates a new div element in the DOM. … Read more

100+ JavaScript Questions and Solutions PDF Guide Quiz test your knowledge of JavaScript

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100+ JavaScript Questions ANSWERS What is the difference between null and undefined in JavaScript? null represents a deliberate non-value or empty object reference, while undefined represents an uninitialized or missing value. What is the purpose of the “use strict” directive in JavaScript? The “use strict” directive is used to enable strict mode, which enforces stricter … Read more

10 Common JavaScript Questions with Code Solutions Free Lesson Learn JavaScript

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Write a function that converts a string to title case (i.e., capitalizes the first letter of each word) in JavaScript.Write a function that calculates the sum of all digits in a given integer in JavaScript.Write a function that removes all whitespace from a given string in JavaScript.Write a function that checks whether a given year … Read more

JavaScript Coding Exercise Random quote generator

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Random quote generator Example of a random quote generator using HTML, CSS, and JavaScript. HTML: <!DOCTYPE html> <html> <head> <meta charset=”utf-8″> <title>Random Quote Generator</title> <link rel=”stylesheet” href=”style.css”> </head> <body> <div class=”container”> <h1>Random Quote Generator</h1> <p id=”quote”></p> <button id=”btn”>Generate Quote</button> </div> <script src=”script.js”></script> </body> </html> In this HTML code, we have created a simple structure for … Read more

HTML5 JavaScript Animation Bouncing Ball Example and Paddle Game

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Bouncing Ball Game JavaScript HTML5 Canvas Bouncing Ball Animation and Game with JavaScript Bouncing Ball using HTML5 Canvas <!DOCTYPE html> <html> <head> <meta charset=”utf-8″> <title>Ball Bounce</title> <style> canvas { border: 1px solid black; } </style> </head> <body> <canvas id=”canvas” width=”500″ height=”500″></canvas> <script> // Get canvas element and context var canvas = document.getElementById(“canvas”); var ctx = … Read more

JavaScript Coding Exercises

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JavaScript Coding Exercises JavaScript coding exercise that involves working with arrays and string manipulation: Exercise: Write a function that takes in an array of words and returns a new array containing only the words that have all their letters in alphabetical order. Example: const words = [‘hello’, ‘world’, ‘abcedf’, ‘goodbye’]; console.log(wordsInOrder(words)); // [‘abcedf’] Explanation: To … Read more

JavaScript DOM Code Examples PDF Download Laurence Svekis

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JavaScript DOM Code Examples What is the DOM in JavaScript and how can we access it? The Document Object Model (DOM) is a programming interface for web documents. It represents the page so that programs can change the document structure, style, and content. We can access the DOM using JavaScript’s document object. Here’s an example: … Read more

JavaScript DOM Code examples Questions with Solutions

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JavaScript DOM Examples What is the DOM? Explain the concept of the DOM hierarchy. Solution: The Document Object Model (DOM) is a cross-platform and language-independent application programming interface that treats an HTML, XHTML, or XML document as a tree structure where each node represents a part of the document. In simple terms, it is an … Read more

10 JavaScript interview questions with solutions and code

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10 JavaScript interview questions with solutions and code How do you check if a variable is an array? Solution: function isArray(variable) {   return Array.isArray(variable); } What is the difference between null and undefined in JavaScript? Solution: null is an intentional absence of any object value and is often used to indicate a deliberate non-value. undefined … Read more

Free 174page PDF Guide to JavaScript Code Examples

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Guide to JavaScriptJavaScript is a high-level, dynamic, and interpreted programming language. It is used to add interactivity and other dynamic elements to websites. The console in JavaScriptVariables:JavaScript CommentsData Types:JavaScript Data TypesArithmetic Operations:Conditional Statements:Functions:JavaScript Loops:JavaScript ArraysJavaScript ObjectsHow to output a table into the consoleJavaScript String MethodsJavaScript Number MethodsJavaScript MathVariables:Arrays:Example : ArrayExample: ObjectObjects:Conditional Statements:Functions:Example: Simple FunctionExample: Conditional … Read more