explaingit

svgdotjs/svg.js

★ 11,764JavaScriptAudience · developerComplexity · 2/5LicenseSetup · easy

TLDR

A lightweight JavaScript library for creating, manipulating, and animating SVG graphics on web pages, with no external dependencies and available via npm or a CDN script tag.

Mindmap

mindmap
  root((svg.js))
    What it does
      SVG creation
      Shape manipulation
      Animation
    Installation
      npm package
      CDN script tag
    Use cases
      Animated icons
      Interactive charts
    Audience
      Frontend developers
      Web designers
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Code map

Detail Auto

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filefunction / class

Things people build with this

USE CASE 1

Add animated SVG icons or illustrations to a web page without writing raw SVG markup by hand

USE CASE 2

Build interactive charts or diagrams that change shape or color in response to user clicks

USE CASE 3

Manipulate shapes in an existing SVG file embedded in a web page using JavaScript

USE CASE 4

Create a smooth animated progress indicator using SVG shapes and the svg.js animation API

Tech stack

JavaScriptSVG

Getting it running

Difficulty · easy Time to first run · 5min
Use freely for any purpose including commercial projects, as long as you keep the copyright notice.

In plain English

SVG.js is a JavaScript library for working with SVG files on the web. SVG (Scalable Vector Graphics) is a format for drawing shapes, icons, charts, and illustrations that can be embedded directly in a web page. Unlike image files, SVG graphics are defined as code, which makes them adjustable through JavaScript. SVG.js provides the tools to do that adjusting and animating. The library's description is brief: it manipulates and animates SVG, has no external dependencies, and is designed to stay lightweight. The README itself does not describe specific features or show code examples, instead pointing readers to the project's documentation website at svgjs.dev for the full reference and guides. Installation follows the standard JavaScript package workflow. You can add it to a project via npm or yarn using the package name @svgdotjs/svg.js. It is also available through CDN links from cdnjs, jsDelivr, and unpkg for projects that load libraries directly in a script tag rather than through a bundler. The library is licensed under the MIT License, which means it can be used freely in personal and commercial projects. The README is sparse beyond the installation instructions, so a reader who wants to understand what the animation and manipulation features actually cover should visit the documentation site. The project has a community chat on Gitter and a Twitter account linked from the README.

Copy-paste prompts

Prompt 1
Using svg.js (@svgdotjs/svg.js), draw a red circle on a web page that animates to blue and doubles in size over one second when clicked.
Prompt 2
Using svg.js, create an animated progress bar as an SVG element that fills from 0% to 100% over two seconds when the page loads.
Prompt 3
Show me how to embed an SVG file in a page with svg.js and then change the fill color of a specific shape by targeting its element ID.
Prompt 4
Using svg.js, build a simple bar chart from a JavaScript array of numbers where each bar is an SVG rect that animates up from zero height on load.
Prompt 5
Using svg.js, create a line that draws itself from left to right over one second using stroke-dashoffset animation.
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