julianshapiro/velocity

Analysis updated 2026-06-24

★ 17,223JavaScriptAudience · developerComplexity · 2/5LicenseSetup · easy

Mindmap

mindmap
  root((velocity))
    Inputs
      DOM elements
      CSS property targets
      Animation options
    Outputs
      Browser animations
      Chained sequences
      UI effects
    Use Cases
      Animate page transitions
      Slide and fade UI elements
      Replace jQuery animate
    Tech Stack
      JavaScript
      TypeScript
      npm

mindmap root((velocity)) Inputs DOM elements CSS property targets Animation options Outputs Browser animations Chained sequences UI effects Use Cases Animate page transitions Slide and fade UI elements Replace jQuery animate Tech Stack JavaScript TypeScript npm

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What do people build with it?

USE CASE 1

Animate slide, fade, and zoom transitions on a webpage

USE CASE 2

Chain multiple animations in one line without callback nesting

USE CASE 3

Drop into a jQuery project as a faster replacement for $.animate

USE CASE 4

Add prebuilt UI effects with the optional UI pack

What is it built with?

JavaScriptTypeScriptnpmCDN

How does it compare?

	julianshapiro/velocity	jonasschmedtmann/complete-javascript-course	vitejs/awesome-vite
Stars	17,223	17,121	17,080
Language	JavaScript	JavaScript	JavaScript
Setup difficulty	easy	easy	easy
Complexity	2/5	1/5	1/5
Audience	developer	vibe coder	developer

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min

Use freely for any purpose, including commercial use, as long as you keep the copyright notice.

In plain English

Velocity is a JavaScript library for creating animations on web pages. It solves the problem of making animations smooth and fast without relying on the slow, limited animation tool that jQuery (a popular JavaScript helper library) provides. If you have ever seen a button that slides in, a panel that fades, or text that zooms into place on a website, that kind of effect is what Velocity handles. The library is written in JavaScript (with a TypeScript rewrite in version 2.0), runs in the browser, and works as a standalone tool, you do not need jQuery to use it, though it can hook into jQuery or Zepto if those are already in your project. You install it via npm (a package manager for JavaScript developers) or load it directly from a content delivery network (CDN, a service that hosts files for fast global delivery). One of its key features is chaining: you can queue multiple animations so they play one after another with a single line of code. An optional UI pack adds a set of pre-built animation effects. A plugin for use with the React user-interface framework also exists as a separate project. The README notes that companies including WhatsApp, Tumblr, and Uber have used Velocity in their products. The project is MIT-licensed, meaning it is free to use in commercial and personal projects.

Copy-paste prompts

Prompt 1

Show me how to install Velocity via npm and animate a div fading in over 500ms

Prompt 2

Convert this jQuery animate call to Velocity syntax and chain a second animation after it

Prompt 3

Write a Velocity sequence that slides a panel in from the left then bounces a button inside it

Prompt 4

Compare Velocity v2 TypeScript API to v1 and tell me what breaks when upgrading

Frequently asked questions

What is velocity?

A JavaScript animation library for web pages. Faster than jQuery animations, works standalone or alongside jQuery/Zepto, ships with optional UI effects pack.

What language is velocity written in?

Mainly JavaScript. The stack also includes JavaScript, TypeScript, npm.

What license does velocity use?

Use freely for any purpose, including commercial use, as long as you keep the copyright notice.

How hard is velocity to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is velocity for?

Mainly developer.

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