Pretext.js API Reference

Complete pretext.js (pretextjs) API reference — prepare(), layout(), layoutNextLine(), and all configuration options for DOM-free JavaScript text measurement. Every function documented with live examples.

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.