Build smooth accordion animations with pretext.js — calculate text height before rendering to animate expand/collapse without triggering browser reflow or layout thrashing. 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.