JavaScript

Common JavaScript Coding Mistakes

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JavaScript coding mistakes and their solutions: 1. Forgetting to close curly braces Curly braces are used to group statements in JavaScript. If you forget to close a curly brace, the JavaScript interpreter will not know where the statement ends, and this can lead to errors. Solution: Always make sure to close your curly braces. If … Read more

JavaScript Daily Quiz

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JavaScript Quiz Questions JavaScript var x = 1; var y = 2; console.log(x + y); Code snippet Output: 3 JavaScript var x = “Hello”; var y = “World”; console.log(x + y); Code snippet Output: HelloWorld JavaScript var x = 1; var y = 2; if (x > y) {   console.log(“x is greater than y”); } … Read more

10 JavaScript Code Interview questions with code example and detailed explanations

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What is the difference between == and === in JavaScript? What is the difference between var, let, and const in JavaScript? What is the difference between an object and an array in JavaScript? What is the difference between a function declaration and a function expression in JavaScript? What is the difference between a closure and … Read more

JavaScript Quiz Questions and Answers 2

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JavaScript Quiz Questions and Answers 2 What is a closure in JavaScript and how do you create one?What is the difference between == and === in JavaScript?How do you declare a variable in JavaScript?What is the difference between null and undefined in JavaScript?How do you check if a variable is an array in JavaScript?What is … Read more

JavaScript Quiz Questions and Answers V1

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JavaScript Quiz Questions and Answers What is a closure in JavaScript and how do you create one?What is the difference between == and === in JavaScript?How do you declare a variable in JavaScript?What is the difference between null and undefined in JavaScript?How do you check if a variable is an array in JavaScript?What is the … Read more

Randomize the order of an array in JavaScript

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Randomize the order of an array in JavaScript To randomize the order of an array in JavaScript, you can use the following code: function shuffleArray(array) { for (let i = array.length – 1; i > 0; i–) { const j = Math.floor(Math.random() * (i + 1)); [array[i], array[j]] = [array[j], array[i]]; } return array; } … Read more

What is meant by strict mode in JavaScript and characteristics of JavaScript strict-mode?

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In JavaScript, strict mode is a feature that allows developers to place their code into a stricter operating context, which helps prevent certain coding mistakes and makes the code more secure. When strict mode is enabled, the JavaScript interpreter will enforce a stricter set of rules and throw more errors when potential issues arise. Some … Read more

Fun with JavaScript Quick Coding Exercises to practice and test your skills with JavaScript Code

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Learn to Code JavaScript Find the largest number in an array:Check if a string is a palindrome:Calculate the sum of an array:Check if a number is even or odd:Reverse a string:Find the factorial of a number:Write a function to check if a given number is even or odd.Write a function to reverse a string.Write a … Read more

Autocomplete with JavaScript

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Autocomplete with JavaScript Provide suggestions from input field – Autocomplete on form field input <!DOCTYPE html> <html> <head> </head> <body>     <input id=”inputField”>     <div id=”listContainer”></div>     <script>         // Define the pre-populated array of values         const prePopulatedArray = [“Apple”, “Banana”, “Cherry”, “Date”, “Elderberry”, “Fig”, “Grape”];         // Get the input field and list container         const inputField = document.getElementById(“inputField”);         const … Read more

JavaScript Interview Questions and Examples 3

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JavaScript Interview Questions and Examples 3 What is the difference between null and undefined in JavaScript? 1 What are closures in JavaScript? 2 How can you check if a variable is an array in JavaScript? 2 Null and undefined are both primitive data types in JavaScript. However, null is an intentional absence of any object … Read more