在Firefox中使用let和yield [英] Using let and yield in Firefox
问题描述
我正在尝试在Firefox中使用 let 和 yield 。我正在测试18和21版本（每晚）并获得相同的结果。
I'm trying to use let and yield in Firefox. I am testing in both versions 18 and 21 (Nightly) and getting the same results.
这是我非常简单的测试脚本：
Here's my really simple test script:
<html>
<head>
<title>test</title>
<script type="text/javascript">
'use strict';
function a() {
yield 5;
}
</script>
</head>
<body></body>
</html>
我收到此错误：
< img src =https://i.stack.imgur.com/WGjDD.pngalt =yield是一个保留标识符>
同样当我做一个使用进行简单测试我得到让它是一个保留标识符，这实在令人沮丧，因为让 自版本2以来一直存在于Firefox中！
Similarly when I do a simple test with let I get "let is a reserved identifier", which is really frustrating because let has supposedly existed in Firefox since version 2!
奇怪的是，如果我在Firebug中执行相同的代码就行了！
Strangely, if I execute the same code in Firebug it works!
我在中尝试过各种其他字符串键入和语言 脚本标签的属性，但是没有找到有效的魔术标签。
I have tried various other strings in the type and language attributes of the script tag but have not found a magic one that works.
发生了什么事？如何使用脚本标记来处理这些内容？
What's going on? How do I get this stuff working with a script tag?
嗯，我明白了，所以你必须指定版本号。我试过这个，但对于我原来使用网络工作者的更复杂的脚本。显然在脚本上使用 version = 1.7 ，该脚本包含一个web worker，其中包含一个使用 let 和<$ c的脚本$ c> yield 不够好 - 网络工作者脚本仍然破坏...然后我尝试减少到最简单的情况但显然没有尝试 version = 1.7 最简单的情况。
Hmm, I see, so you must specify the version number. I had tried this, but for my original more complicated script which used web workers. Apparently using version=1.7 on a script which includes a web worker which includes a script that uses let and yield isn't good enough -- the web worker script still breaks... Then I tried reducing to simplest case but apparently didn't try version=1.7 in simplest case.
谢谢......可能会稍微发布另一个问题（搜索后）如何让网络工作者工作。
Thanks... Might post another question in a little bit (after searching) on how to get this working for web workers.
推荐答案
as mdn note ，
yield关键字仅适用于代码块HTML包含在
< script type =application / javascript; version = 1.7>块（或更高版本）
所以将< script type =text / javascript> 更改为<脚本类型=应用/ JavaScript的;版本= 1.7> 将使其正常工作。
So changing <script type="text/javascript"> to <script type="application/javascript;version=1.7"> will make it work.
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