Learn LOTTIEFILES with Real Code Examples

Updated Nov 26, 2025

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Installation Setup

Install via npm: npm install lottie-web

Or include via CDN: <script src='https://cdnjs.cloudflare.com/ajax/libs/bodymovin/5.10.2/lottie.min.js'></script>

Import Lottie in JS: import lottie from 'lottie-web';

Prepare a container element in HTML

Load and initialize animation via lottie.loadAnimation()

Environment Setup

Modern browser or mobile runtime

After Effects with Bodymovin plugin for authoring

Node.js for web integration

Optional bundler (Webpack, Vite, Rollup)

Container element ready in HTML/React/Flutter view

Config Files

index.html or App.vue / App.js - container

main.js - Lottie initialization

assets/ - JSON animation files

styles/ - optional layout styling

utils/ - helper functions for triggers or interactivity

Cli Commands

npm install lottie-web

yarn add lottie-web

npm run dev / build for web projects

flutter pub add lottie for Flutter

Use LottieFiles web platform for preview and sharing

Internationalization

Text layers in animations can be replaced per language

Animation timings unaffected by language

Content translation handled externally

Animations remain universal across locales

Integration with i18n frameworks possible

Accessibility

Canvas/SVG animation is not screen reader-friendly by default

Provide alternative HTML/CSS content

Ensure interactive elements are focusable

Respect reduced motion preferences

Label animations or triggers appropriately

Ui Styling

Animations render in container via SVG or Canvas

Overlay HTML elements for interactive UI

Responsive sizing via CSS or JS

Integrate with app design system for consistency

Dynamic properties allow in-animation styling changes

State Management

Animation instance tracks playback state

Looping, speed, and direction controlled via API

Interactive triggers can modify frame or segment

Integration with external state managers possible

Multiple Lottie instances can run independently

Data Management

Animation JSON is lightweight and cacheable

Layers, shapes, and keyframes stored in structured JSON

External data can modify animation dynamically

Reuse JSON assets across multiple views

Optimize file size for network delivery