JavaScript

How-tos How to Replace All Instances of a String in JavaScript In this tutorial we present multiple ways to find and replace strings in JavaScript, using standard library functions and regular expressions. ↗ How-tos How to Display a JavaScript Variable in HTML Body JavaScript variables are easily handled and displayed in HTML body. In this case, we we discuss the innerHTML, document.write(), and window.alert() property to display a HTML … ↗ How-tos How to Check Whether a Button Is Clicked by JavaScript The check of whether a button is clicked using JavaScript can be held by three methods. Adding onclick attribute in HTML, initializing onclick in script tag as a method, and using … ↗ How-tos How to Scroll Automatically to the Bottom of the Page in JavaScript This article teaches you about how to scroll automatically to the bottom of the page in JavaScript. It also educates you how to do scrolling with and without animation in … ↗ How-tos How to Generate Permutations in JavaScript Permutation is a mathematical concept of setting up maximum possible combinations of a given string or array. In JavaScript to result in such output, the drive is to use … ↗ How-tos How to Display Text When Checkbox Is Checked in JavaScript This tutorial guides you about how to display text when checkbox is checked in JavaScript. It also instructs about the use of jQuery function and events. ↗ How-tos How to Create A Count Up Timer in JavaScript This article demonstrates various ways to display a JavaScript count up timer using functions, objects and jQuery library. ↗ How-tos How to Create Simple Pagination in JavaScript This article will demonstrate how you can create pagination to surf on webpages using custom pagination functions and the jquery plugin, pagination.js. ↗ How-tos How to Convert an Image Into Base64 String Using JavaScript This article will discuss how to convert an image to its base64 string representation by creating a canvas and load the image into it, and using file reader method to get the … ↗ How-tos How to Check Whether an Element Contains a Class in JavaScript Learn how to perform a check on an element in order to find out if it contains a specific class. ↗ How-tos How to Check if a Value Is NaN in JavaScript The goal of this tutorial is to provide you with multiple ways to check if a value is of type NaN in JavaScript. ↗ How-tos How to Return Multiple Values in JavaScript JavaScript do not support functions that can return multiple values. But multiple values can be passed via array or object and later can be accessible. ↗ How-tos How to Parse Query String in JavaScript This tutorial describes how to use parse query string using function in JavaScript ↗ How-tos How to Detect Arrow Key Presses in JavaScript This tutorial describes how to use keyboard event listener in JavaScript. ↗ How-tos How to Open Local Text File Using JavaScript This tutorial demonstrates different methods to open local text file using JavaScript. It also exemplifies using FileReader, Promise, and jQuery. ↗ How-tos How to Iterate Through a Map in JavaScript JavaScript allows iteration through an object by the help of key-value pair data structure aka the map. The iteration process operates in multiple ways like the pre ES6 format … ↗ How-tos How to Filter Object Arrays Based on Attributes in JavaScript JavaScript objects can be used in a variety of forms. Using an object to form an array and retrieving filtered value from it based on attributes can be operated with the filter … ↗ How-tos How to Disable JavaScript in Google Chrome Developer Tools Learn how to disable JavaScript on web pages from the Chrome developer tools Settings panel. ↗ How-tos How to Create a Map Function for Objects in JavaScript This tutorial shows the methods you can use to map objects using a custom function to perform operations on the object's attributes in JavaScript. ↗ How-tos How to Check if a String Is a Valid JSON String in JavaScript This tutorial describes how to check if JSON string is valid or invalid in Javascript. ↗ How-tos How to Add Options to Select With JavaScript The manual possibility of adding option to select element can be altered with JavaScript. The Dom manipulation to create and append new options, initializing Option constructor to … ↗ How-tos How to Create Associative Arrays in JavaScript This tutorial shows you how you can build associative arrays in JavaScript using objects and Map(). ↗ How-tos How to Change Button Text in JavaScript This tutorial shows how you can change button text using JavaScript and demonstrates the use of jQuery to change the button text. ↗ How-tos How to Return False in JavaScript This article explains the return false and preventDefault statements in JavaScript; when and where to use these statements and what is the difference between them. ↗