Underscore.js

Underscore.js: JavaScript Library for Utility Functions

Underscore.js is a JavaScript library that provides utility functions for common programming tasks like mapping, filtering, and functional programming paradigms. It allows developers to leverage functional techniques which can help manage state and complexity in web applications.

What is Underscore.js?

Underscore.js is an open-source JavaScript library that provides several utility functions to facilitate common programming tasks. Created by Jeremy Ashkenas, it serves as a utility belt for JavaScript projects - providing simple implementations for otherwise time-consuming coding challenges.

The library provides helper methods for iteration, function binding, arrays, objects, and DOM manipulation among other things. Key features include:

• Functional programming helpers like map, filter, invoke, for chaining
• Utility functions like delay, throttle, debounce
• Simplified DOM manipulation and events
• Object functions like keys, values, extend
• Template engine using JavaScript templates

By abstracting away common functionality into its API, Underscore enables developers to focus more on their product logic rather than re-writing basic helpers and utility functions. This can help reduce bugs and accelerate development.

Underscore leverages functional programming patterns for stateless and declarative coding techniques. This paradigm lends itself well to complex web applications where state management can easily become convoluted. Underscore makes it simpler to avoid shared state in favor of more predictable and testable code.

The library is often used in conjunction with other JavaScript frameworks like jQuery, Angular, React, and more. It has no dependencies itself making extremely portable. Underscore is deployed in production on many high-traffic websites due to its low footprint and performance.

Underscore.js Features

Official Links