JavaScript

How-tos How to Get the First Element of an Array in JavaScript Get the first JavaScript array element with array[0], or choose destructuring, find(), or shift() when their behavior fits. ↗ How-tos How to Pass JavaScript Function as Parameter Learn how to pass a JavaScript function as an argument, combine it with other values, use callbacks, and return a function from another function. ↗ 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 Print Array Elements in JavaScript This tutorial shows different ways to print all or a certain number of JavaScript array elements. ↗ How-tos How to Get Height of the Div Element in JavaScript This tutorial introduces how to get the height of a div element inside JavaScript. ↗ How-tos How to Stop a setInterval() Timer in JavaScript Stop a repeating JavaScript timer by saving the identifier returned by setInterval() and passing it to clearInterval(). ↗ How-tos How to Convert a String Into a Date in JavaScript Learn how to convert standard and custom date strings into JavaScript Date objects, and how to handle time zones and invalid input. ↗ How-tos Case Insensitive String Comparison in JavaScript This article explains how to perform comparisons between case insensitive strings in JavaScript. Discover various methods including toLowerCase, toUpperCase, localeCompare, and … ↗ How-tos How to Insert Variable Into String in JavaScript Learn how to insert variables into JavaScript strings with template literals, console formatting, and sprintf-js. ↗ How-tos How to Check if a Value Is Object in JavaScript In this tutorial we will check if a value is an object in JavaScript ↗ How-tos JavaScript Equivalent to Printf or String.Format This tutorial describes how to replicate the functionality of printf() in JavaScript. Explore various methods like template literals, Intl.NumberFormat, and the sprintf-js library … ↗ How-tos How to Convert a Float Number to Int in JavaScript Learn how to truncate or round a JavaScript Number, parse decimal text, and avoid unsafe bitwise conversion shortcuts. ↗ How-tos Integer Division in JavaScript Choose truncation or floor semantics to calculate an integer quotient and remainder correctly in JavaScript. ↗ How-tos How to Close a Modal in JavaScript Learn how to close a Bootstrap modal or a native HTML dialog with JavaScript, including version-specific APIs and common boundaries. ↗ How-tos Handle a Select Change Event in JavaScript Use the change event to read a select element's value, handle multiple selects, and distinguish user changes from programmatic updates. ↗ How-tos JavaScript Tuple Alternatives: Arrays, Objects, and TypeScript JavaScript has no native tuple type. Use arrays, objects, Object.freeze(), destructuring, or TypeScript tuples for the appropriate contract. ↗ How-tos How to Get Current Year in JavaScript This tutorial explains how to get the current year in JavaScript using various methods. Learn to utilize the Date object, Date.UTC, and popular libraries like Moment.js and Luxon … ↗ How-tos How to Change Image Source JavaScript Learn how to change image sources using JavaScript in this comprehensive guide. Discover simple methods, including direct property manipulation and event listeners, along with … ↗ How-tos How to Collapse or Expand a DIV in JavaScript This tutorial demonstrates how to collapse or expand a div in JavaScript using jQuery. Learn to implement smooth animations with slideToggle() and fadeToggle(), or create a custom … ↗ How-tos How to Convert UTC to Local Time in JavaScript This tutorial demonstrates how to convert UTC to local time in JavaScript. Learn various methods, including using the built-in Date object, toLocaleString(), Moment.js, and Luxon … ↗ How-tos How to Open URL in a New Window With JavaScript This tutorial demonstrates how to open a URL in a new window using JavaScript. Learn various methods including window.open(), anchor tags, and event listeners with clear examples. … ↗ How-tos Constants in JavaScript Discover the importance of constants in JavaScript with this comprehensive guide. Learn when to use constants, best practices, and common mistakes to avoid. Enhance your coding … ↗ How-tos How to Alert New Line in JavaScript Learn how to add new lines to alerts in JavaScript with simple methods like using newline characters and template literals. Enhance user experience by formatting alert messages … ↗ How-tos How to Convert a String to Boolean in JavaScript Learn how to convert a string to boolean in JavaScript with various methods including JSON.parse, conditional statements, and utility functions. This guide provides clear code … ↗