JavaScript DOM lessons

JavaScript interview questions with code examples

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JavaScript interview questions with code examples: What is hoisting in JavaScript and how does it work? console.log(hoistedVariable); // undefined var hoistedVariable = ‘This is a hoisted variable’; console.log(notHoisted); // ReferenceError: notHoisted is not defined let notHoisted = ‘This is not a hoisted variable’; What is closure in JavaScript and how is it useful? function outerFunction(x) … Read more

JavaScript interview questions with Examples of Code and Code Snippets 2023

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JavaScript interview questions with answers: What is closure in JavaScript and how does it work? Answer: Closure is a feature in JavaScript where a function has access to its outer scope even after the outer function has returned. It is created when a function is defined inside another function, and the inner function retains access … Read more

JSON parse and JSON stringify with JavaScript Code

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JSON.stringify JSON.stringify is a method in JavaScript used to convert a JavaScript object into a JSON string. JSON stands for JavaScript Object Notation and is a lightweight data interchange format used for exchanging data between systems. Here are some examples of using JSON.stringify: Converting a JavaScript object to a JSON string: const person = { … Read more

JavaScript Template Literal

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A template literal in JavaScript is a type of string literal that allows for embedded expressions, represented by expressions inside ${}. They are indicated by using backticks (“) instead of quotes (” or ‘). Example: const name = “John”; const sentence = `Hello, my name is ${name}.`; console.log(sentence); // Output: “Hello, my name is John.” … Read more

The JavaScript DOM 15 Simple Code Examples

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The JavaScript Document Object Model (DOM) is a programming interface for HTML and XML documents. It represents the structure of a document as a tree of objects, with each object (or “node”) representing a part of the document, such as an element, an attribute, or text content. The DOM allows developers to access and manipulate … Read more

How to Create Page Elements with JavaScript

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Create Page Elements with JavaScript How to Create Page Elements and make them Interactive with Event LIsteners There are several ways to create page elements with JavaScript, including: Using the document.createElement() method, which creates a new element with the specified tag name. For example, the following code creates a new div element: let newDiv = … Read more

Create an interactive table list of item object values from a JavaScript array.

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Create a list of items within a table using JavaScript.  Data is contained within an array with object values. <!DOCTYPE html> <html> <head>    <title>Learn JavaScript</title>    <style>        table{            width:100%;        }        td:first-child{            width:10%;        }        td:last-child{            width:10%;        }        td{            border: 1px solid #ddd;        }    </style> </head> <body>    <h1>Learn JavaScript Course </h1>    <div>        <input type=”text” id=”addFriend” >        <input type=”button” … Read more

JavaScript Create Element List

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The document.createElement() method in JavaScript is used to create a new HTML element with a specified tag name. The method takes a single argument, which is the tag name of the element to be created. For example, document.createElement(“div”) creates a new div element. The newly created element can be accessed and modified through the DOM … Read more

Learn To Code JavaScript Free PDF 2023 Volume 2

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JavaScript Closure Explained https://youtu.be/7vyHA0aODeU A closure in JavaScript is a function that has access to variables in its parent scope, even after the parent function has returned. Closures are created when a function is defined inside another function, and the inner function retains access to the variables in the outer function’s scope. Here is an … Read more

How to create a simple JavaScript game from scratch Lock Combo Guessing Game with source code

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Lock Combo Guessing Game Dynamic number of lock slots, guess the correct combination to open the lock. When the guess is incorrect the background of the lock slot will be blue for too low and red for too high. Use the hints to select and guess the correct values for each slot. Once all the … Read more