dotCooCoo b172e3672d JavaScript: for each evaluates its target before reading the value ...

A for each loop read the property's value before evaluating its target,
so a target such as (o.p = 2, t).v, t[(o.p = 3, 'w')] or a bare
@[(o.p = 2, 'k')] stored the value from before the target ran. The
target's object and name are now evaluated first and the value is read
after them (ECMA-357 section 12.3).

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..

src

JavaScript: for each evaluates its target before reading the value

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tests

Tests: test262 skips a test only when its code uses a missing built-in

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Cargo.toml

JavaScript: characters assigned in Unicode 17 are identifier characters

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