To check that a JS variable is of a type string, you can use 2 operators: instanceof and typeof. Here’s a quick solution. if (typeof text === 'string' || text instanceof String) { // it's a string!...
To get a random number is JS you almost always rely on the function Math.random. The only issue is that it returns a number between 0 and 1. You can generate a number in a specific range by writing a straightforward function....
The object window.screen holds all the information you about the current screen. You can access the resolution of the screen by accessing its width and height properties. ...
There are 2 jQuery selectors that can help you determine whether an HTML element is visible or not. First, you can use the selector :visible to check if an element is visible on the web page....
Learn how to print the whole array with JS and how to print individual elements of the JS array in both HTML (browser) and Node.js (server-side) environments. ...
To toggle (show/hide) an HTML element with a button click you need to do one simple trick in the onclick handler of that button. Let me show you how it’s done. ...
You can add a vertical line to your HTML page by using the <div> tag with custom CSS styling. Let’s dive into the details. ...
You can disable any HTML button with JavaScript, by setting its disabled property to true. Let’s see how you can locate a specific button and prevent clicks by disabling it. ...
A JavaScript confirm function is a convenient way to display the confirmation box with the “OK” and “Cancel” options and capture user’s response. Let’s see how it’s done. ...
You can add a line break in HTML using the <br> tag. It works in all browsers. The <br> tag is a so-called “empty tag”, which means it doesn’t need a closing tag....