javascript - 标记函数声明的目的是什么

Question

我最近遇到了Labeled function declarations。 MDN上没有太多关于他们的说法网站:

Starting with ECMAScript 2015, labeled function declarations are now standardized for non-strict code in the web compatibility annex of the specification.

L: function F() {}

standard也没有添加太多细节，网络上也没有任何内容。

有人用过吗？他们的目的是什么？任何信息表示赞赏。

Answer 1

据我所知，唯一的目的似乎是支持网络上的错误代码。它们无法被引用，并且完全没有用。

Brendan Eich, 2012 :

People tend to make unnecessary labels, especially in event handlers where javascript: at the front of the HTML attribute value has been seen in the wild. Couple that with a function expression that is not parenthesized, but possibly immediately invoked, and you have real trouble.

它们是无用的语法遗留物这一事实是它们被清除的原因。