JavaScript: Guides and Practical Know-how | Page 21 | mironsoft Blog
JavaScript
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Jan 7, 2025
A recording in the Performance Panel looks at first glance like a colorful bar chart. Combining Flame Chart, Call Tree, Bottom Up and Event Log reveals the actual cause of jank, a blocked main thread and poor Web Vitals, instead of just treating symptoms.
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Jan 2, 2025
ESM and CommonJS are two fundamentally different module systems that must coexist in the same Node runtime, and that is exactly where ESM/CJS interop problems come from. Anyone who does not understand the difference between require() and import will eventually hit ERR_REQUIRE_ESM, lost named exports, or a broken instanceof check caused by a dependency loaded twice.