Author name: Artturi Jalli

In JavaScript, semicolons are optional. Yes, you heard it right. However, there are some situations in which omitting a semicolon can lead to unwanted consequences. So there is no definitive answer as to whether you should use a semicolon or not. Using semicolons always causes a debate in the JavaScript community. There are good arguments […]

To ask for user input in JavaScript, use the built-in window.prompt() method. For example: This shows the following modal at the top of your page: Prompt Box in JavaScript To ask for user input in JavaScript, you can use the built-in prompt box. To show a prompt, use the prompt() method. This method takes two

One way to pass a variable from one HTML page to another using JavaScript is to use the browser’s localStorage object. localStorage provides a way to store key-value pairs in the user’s web browser, so that they persist across different pages and sessions. Here’s an example of how you could use localStorage to pass a

To calculate the age from birthdate in JavaScript, you can use this function: Here’s an example use of this function (called on 10th Feb 2023): Output: I hope this quick answer helps. If you have trouble understanding how this code works and what exceptions there are in calculating age (leap years), please read along. Problems

Getting the X, Y position of an HTML element in JavaScript can be accomplished using the following code: Where element is the HTML element whose position you want to retrieve. The offsetLeft and offsetTop properties give us its X and Y positions. To get the position relative to the viewport (changes on the scroll and

You can use both single and double quotes in JavaScript. There’s no specific rule that dictates which one you should use. This means you can choose the style that suits you the best. But in the name of consistency, I recommend sticking with one style, though. Also, since ES6, you can also use template literals

You can use jsbeautifier library to format your JavaScript code from the command line. Quick Guide To use this library, install it first by running the following command in the command-line window. This assumes you have pip installed. Then use it on a JavaScript file by calling (assuming the file is in the same folder

JavaScript is one of the most popular programming languages out there. It is used widely in the field of web development and it is an in-demand skill in the job market. Here is a comprehensive list of 100 programming interview questions and answers. In addition to interviews, these can be handy if you’re studying for

To get selected text from a textbox using JavaScript, you can use the following JavaScript code: You can try the above code solution by highlighting some text from the textbox below and clicking the button. Then whatever you highlight will appear in the alert box that pops up when you click the button. Highlight this

To select all div text with a single mouse click in JavaScript, you can use the following code: HTML: JavaScript: Here’s what the JavaScript function does step-by-step: Update: Because Internet Explorer is no longer in use, you might just want to remove the if-else function and use the code inside the else block. Test the