Category: JavaScript

JavaScript bookmarklets are an under-rated feature that lets you manipulate webpage content on-the-fly. By activating a simple piece of JavaScript, you can turn any webpage into a dynamic text editor. This is super helpful for experimentation and content revision. What is a JavaScript bookmarklet? A JavaScript bookmarklet is essentially a bookmark stored in your browser… Continue reading How to turn webpages into editable canvases with a JavaScript bookmarklet

Using a variable as a key in JavaScript allows for dynamic assignment and access to properties within objects. It’s a flexible way to handle property identifiers that are determined at runtime. Understanding objects and keys in JavaScript Objects in JavaScript are collections of properties, and properties are key-value pairs. A key (or property name) can… Continue reading How to use a variable as a key in JavaScript

You can remove decimals in JavaScript by converting a number to an integer or formatting it as a string without fractional parts. We’ll cover this below. Understanding the need for removing decimals JavaScript often requires working with integer values, for example, when dealing with pixel values in web development or when performing calculations that require… Continue reading How to remove decimals in JS

In order to determine if a number if a float in JavaScript, you need to understandthe nature of number representation in the language. Since JavaScript uses IEEE 754 standard for floating-point arithmetic, integers and floats are not distinct types. But there are techniques to differentiate them. We’ll cover them below. Understanding number representation in JavaScript… Continue reading How to Check if a Number is a Float in JavaScript

When you work with JSON data or state management apps, you’ll probably have to merge objects with the same key in JavaScript. Doing so requires you to combine properties from two or more objects into a single object. Overview of Object Merging When merging two objects, if they share the same key, the value from… Continue reading How to Merge Two Objects with the Same Key in JavaScript

In JavaScript, raw string literals let you handle strings that contain backslashes without interpreting them as escape characters. You access this via the String.raw() method, which is often used in regular expressions and file paths. Understanding String.raw() The String.raw() method returns a string where escape characters (like n for a new line) are ignored and treated as literal text. This is particularly… Continue reading JavaScript Raw String Method

Nested for loops in JavaScript are a method for iterating over data structures that require multiple levels of looping. They are particularly useful when dealing with multi-dimensional arrays or performing repeated actions within another loop. What are nested for loops in JavaScript? A nested for loop is when you have one for loop inside another… Continue reading Understanding Nested For Loops in JavaScript

You can read a CSV file in JavaScript with the FileReader API for client-side operations or Node.js modules like fs for server-side processing. This guide walks you through the implementation details for both environments. Understanding the FileReader API The FileReader API is designed for reading file contents from the user’s computer. It is asynchronous and works with callback functions to handle… Continue reading How to read a CSV file in JavaScript