Dan Neciu's Favorite JS Feature & How to Use It
summary
Shows that JavaScript proxies let you wrap a large object so every property write triggers a trap that reports where and when it changed. Uses built-in proxies to wrap nested structures, installs get/set traps, and surfaces notifications on change with stack or caller info so debugging sneaky state updates across modules becomes concrete. Works in real apps, scales to many properties and multiple mutation sites to track mutations reliably.
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