我需要在 JavaScript 中的 `throw` 之后 `return` 吗？
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Do I need to `return` after `throw` in JavaScript?
提问by Matthew
I'm throwing an Errorfrom a method of mine that I want an early exit from, as below:
我正在Error从我想要提前退出的方法中抛出一个，如下所示：
// No route found
if(null === nextRoute) {
throw new Error('BAD_ROUTE');
}
Do I need to put a return;statement after my throw? It works for me, for now. If it's superfluous I'd rather not put it in, but I can't be sure what different browsers might do.
我需要return;在我的后面加一个声明throw吗？它现在对我有用。如果它是多余的，我宁愿不把它放进去，但我不能确定不同的浏览器会做什么。
回答by Rob M.
You do not need to put a returnstatement after throw, the returnline will never be reached as throwing an exception immediately hands control back to the caller.
您不需要在 之后放置return语句throw，return因为抛出异常会立即将控制权交还给调用者，因此永远不会到达该行。
