JavaScript DOM lessons

JavaScript Common Interview Questions and Solutions Coding Examples

by

JavaScript Common Interview Questions and Solutions Coding Examples Closure 2forEach Array 3JavaScript Map function 3JavaScript Filter 4Check if number is an integer 5Is the string a palindrome 6Reverse a String 6Find the largest number in an array 8Check Object Property 8Common Elements in two Arrays 9 ClosureWhat is closure in JavaScript and give an example … Read more

JavaScript Async Code Examples

by

JavaScript Async Code Examples JavaScript is a single-threaded language, which means that it can only execute one piece of code at a time. This can make it challenging to perform long-running tasks, such as network requests, without freezing up the UI. To solve this issue, JavaScript provides the concept of asynchronous programming, which allows you … Read more

JavaScript Best Practices 2023 with Example Code

by

10 best practices for writing efficient and maintainable JavaScript code: Use const instead of var or let whenever possible. This helps prevent accidental modification of variables. Example: const name = “John”; name = “Jane”; // Error: “name” is read-only Declare variables as close as possible to their first use. This reduces their scope and makes … Read more

JavaScript interview questions with code examples

by

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

by

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

by

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

by

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

by

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

by

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.

by

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