Be Mindful With Modernizr
Read OriginalThis technical article investigates a performance issue where Modernizr, a JavaScript library for detecting HTML5/CSS3 features, was found to block the browser's main thread. It explains how Modernizr's method of testing for CSS 3D transforms triggers a style recalculation and reflow, causing significant delays in rendering, especially on mobile. The post includes code analysis and performance profiling data to illustrate the problem.
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