uWrap.js – A faster and more accurate text wrapping util in < 2KB

In plain words

uWrap.js is a text wrapping utility designed for developers who need efficient word-wrapping functionality in their applications. It offers faster performance and greater accuracy than comparable solutions while maintaining a compact footprint of less than 2KB. The tool is available on GitHub, making it accessible for integration into web and JavaScript projects where precise text formatting is required.

written from the facts on this page · September 2026

From the sources

uWrap exists to efficiently predict varying row heights for list and grid virtualization , a technique for UI performance optimization when rendering large, scrollable datasets. Doing this both quickly and accurately turns out to be a non-trivial task since Canvas2D provides no API for text wrapping, and measureText() is quite expensive; measuring via DOM is also a non-starter due to poor performance. Additionally, font size, variable-width kerning , letter-spacing , explicit line breaks, and different white-space choices affect the wrapping locations. uWrap outperforms canvas-hypertxt by a wide margin in both CPU and memory usage while being significantly more accurate. The benchmark below…from github.com

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