Closed ExE-Boss closed 4 years ago
https://github.com/ljharb/es-abstract/commit/7a963e3939da431e994d2181875f95b1e8ab239e made it so that Set invokes the [[Get]] internal method when Throw is set, regardless of whether the environment is IE 9.
Set
[[Get]]
Throw
This makes it so that the observable [[Get]] call isn’t performed in environments that correctly throw when attempting to set read‑only properties.
This also fixes the bug where Set would return undefined for successful sets when Throw === false.
undefined
Throw === false
https://github.com/ljharb/es-abstract/commit/7a963e3939da431e994d2181875f95b1e8ab239e made it so that
Setinvokes the[[Get]]internal method whenThrowis set, regardless of whether the environment is IE 9.This makes it so that the observable
[[Get]]call isn’t performed in environments that correctly throw when attempting to set read‑only properties.This also fixes the bug where
Setwould returnundefinedfor successful sets whenThrow === false.