Indent a JavaScript string
Indent each line in a string by a specified number of spaces or a custom indentation character.
JavaScript Snippets
The JavaScript snippet collection contains a wide variety of ES6 helper functions. It includes helpers for dealing with primitives, arrays and objects, as well as algorithms, DOM manipulation functions and Node.js utilities.
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JavaScript · What is the difference between JavaScript's equality operators?
Learn all you need to know about the differences between JavaScript's double equals and triple equals operators.
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JavaScript · What does the double negation operator do in JavaScript?
You've probably come across the double negation operator (
!!) before, but do you know what it does? -
JavaScript · Calculate the byte size of a JavaScript string
Figure out the exact number of bytes in a JavaScript string, including Unicode characters.
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JavaScript · Abort a fetch request in JavaScript
Aborting a fetch request in JavaScript is a common problem. Here's how to handle it correctly.
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JavaScript · Generate a random boolean value in JavaScript
A quick, one-liner to generate a random boolean value in JavaScript.
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JavaScript · Pad a string with a character
Pad a string on both sides with the specified character, if it's shorter than the specified length.
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JavaScript · What is an IIFE in JavaScript?
An Immediately Invoked Function Expression (IIFE) is a JavaScript trick that trips up many developers. Here's what you need to know.
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JavaScript · Calculate the quotient and remainder of a division in JavaScript
Implement Python's
divmod()built-in function in one line of JavaScript. -
JavaScript · What is the only value not equal to itself in JavaScript?
Did you know there's a JavaScript value that's not equal to itself?
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JavaScript · Detect user color scheme preference in JavaScript
Use a media query to check if the user prefers a light or dark color scheme.
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JavaScript · Get the width of the scrollbar using JavaScript
Easily and reliably calculate the width of the browser's vertical scrollbar with JavaScript.
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JavaScript · Create a JavaScript generator function based on a condition
Learn how to create a generator function that keeps producing new values as long as the given condition is met.
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JavaScript · Are JavaScript strings immutable?
When it comes to immutability, JavaScript strings are often a source of confusion. Yet they're not as complicated as you might expect.
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JavaScript · What is the difference between prefix and postfix operators?
While both the prefix and postfix operators increment a value, the resulting value of the expression is very different.
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JavaScript · JavaScript's numeric separators explained
Numeric separators are a somewhat lesser-known JavaScript syntactic sugar that can make working with large constants a lot easier.
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JavaScript · How can I check if a number is even or odd using JavaScript?
Check if a number is even or odd using JavaScript using the modulo operator or bitwise AND operator.
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JavaScript · What is the difference between an expression and a statement in JavaScript?
JavaScript distinguishes expressions and statements. Learn their differences in this short article.
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JavaScript · Copy sign from one number to another in JavaScript
Copy the sign of one number to another without changing its absolute value.
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JavaScript · What's the difference between Object.is() and the triple equals operator in JavaScript?
Object.is()and the triple equals operator (===) can both be used for equality checking in JavaScript, but when should you use each one? -
JavaScript · Can I reload a module in Node.js?
Ever wanted to reload a module in Node.js? Here's how you can do it.
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JavaScript · Debugging Node.js using Chrome Developer Tools
Did you know you can use Chrome Developer Tools to debug your Node.js code? Find out how in this short guide.
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JavaScript · Check if two URLs are on the same origin
Can you tell if two URLs are on the same origin? Here's a very simple way to do so.
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JavaScript · How can I specify the base for a logarithm in JavaScript?
Calculate the logarithm of a number or check if a number is a power of a specific base.