Chat Bubbles with Pretext.js

Create chat bubble layouts with pretext.js — dynamically calculate message bubble size based on text content without DOM measurement. Perfect for AI streaming chat UI. Live pretextjs demo.

This page is part of Learn Pretext — interactive tutorials and live demos for pretext.js, the zero-dependency JavaScript text measurement library by Cheng Lou. New to the library? Start with the pretext.js tutorial, read why pretext exists, or browse the API reference. Enable JavaScript to run the live interactive demo and view its annotated source code.