pretext — Fast Multiline Text Measurement & Layout

No DOM reflow. Pure arithmetic on cached font metrics.

pretext is a pure JavaScript/TypeScript library for fast, accurate, and comprehensive multiline text measurement and layout — without triggering getBoundingClientRect, offsetHeight, or any other DOM reflow operations.

Installation

Plugin (Claude Code)

claude plugin marketplace add chenglou/pretext

npm

npm install @chenglou/pretext