在函数定义中，星号意味着什么，如“function *（）”？ [英] What does the star mean in function definition like "function* ()"?

问题描述

 function*() { .... }

我刚刚发现这种形式的定义在其他一些js代码中，星星是什么意思呢？谢谢

I just found that form of definition in some other js code, what does the star mean indeed? Thanks

推荐答案

从这里

具有*令牌的函数被称为生成函数。两个一元运算符之后的
只允许在生成函数的直接体
中（即在体内但不嵌套在
另一个函数中）：

A function with a * token is known as a generator function. The following two unary operators are only allowed in the immediate body of a generator function (i.e., in the body but not nested inside another function):

AssignmentExpression:
    ...
    YieldExpression

YieldExpression:
    "yield" ("*"? AssignmentExpression)?

如果产生yield或yield *一个
非生成函数。

An early error is raised if a yield or yield* expression occurs in a non-generator function.

同时查看 MDN 和 这是什么东西叫做发电机？

Also check the MDN and What Is This Thing Called Generators?

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