Lea Verou 4/28/2023

JS private class fields considered harmful

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A library author explains why they are removing private class fields from their JavaScript code. The core issue is that objects with private fields cannot be proxied, which breaks reactivity systems in frameworks like Vue 3 and Mavo. The article details the technical conflict and the author's difficult decision to revert to private-by-convention patterns for better library compatibility.

JS private class fields considered harmful

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