SyntaxError:missing =在const声明Firefox 50中 [英] SyntaxError: missing = in const declaration Firefox 50
问题描述
我有一个如下循环:
const bar = {a: 1, b: 2}
for (const k in bar) { //Throws in Firefox but not Chrome 54
console.log(k)
}
这是一个bug吗?或者可能是规范中的灰色区域?
Is this a bug? Or maybe a gray area in the spec?
推荐答案
是的,这似乎是Firefox中的一个错误。 规范允许使用 const
:
Yes, this appears to be a bug in Firefox. The spec allows the use of const
:
IterationStatement:
for(ForDeclaration in Expression) Statement
ForDeclaration:
LetOrConst ForBinding
ForBinding:
BindingIdentifier
BindingPattern
(截断和简化)
似乎Firefox不正确地将解释为 LexicalBinding 。
It seems Firefox is incorrectly interpreting ForDeclaration as a LexicalBinding.
相关: ECMAScript 2015: const in for循环
这似乎是针对此问题的错误报告: https:// bu gzilla.mozilla.org/show_bug.cgi?id=1101653 。
This seems like the bug report for this issue: https://bugzilla.mozilla.org/show_bug.cgi?id=1101653 .
正确让
和 const
来到Firefox: https://twitter.com/evilpies/status/768881995912994816
Proper let
and const
is coming to Firefox: https://twitter.com/evilpies/status/768881995912994816
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