`for of` JavaScript 语句的支持情况如何？
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How well is the `for of` JavaScript statement supported?
提问by TheBlackBenzKid
var nameArray = [
{ name: 'john', surname: 'smith' },
{ name: 'paul', surname: 'jones' },
{ name: 'timi', surname: 'abel' },
];
for (str of nameArray) {
console.log( str.name );
}
I want to know, how supported is for( item of array )in terms of browser support, mobile JavaScript support - I realize you cannot do greater than >and this is pure iteration?
我想知道，for( item of array )在浏览器支持、移动 JavaScript 支持方面的支持程度如何——我意识到你做不到greater than >，这是纯迭代？
I have just discovered this, is this as good as I hope it is?
我刚刚发现了这一点，这是否如我希望的那样好？
采纳答案by Gianthra
The classic way of doing this is as follows:
这样做的经典方法如下：
for(var i = 0; i < nameArray.length; i++){
var str = nameArray[i];
}
This will give you the exact functionality of a "foreach" loop, which I suspect is what you're really after here. This also gives you the added benefit of working in Internet Explorer.
这将为您提供“foreach”循环的确切功能，我怀疑这正是您在这里真正想要的。这也为您提供了在 Internet Explorer 中工作的额外好处。
There is also extensive knowledge of the exact loop described in the MDN. At this time Android web and it seems not everything supports your method so check the compatibility list on that page; seems to be a future release of the new JavaScript that will probably have OOP inside it.
MDN 中描述的精确循环也有广泛的知识。此时 Android 网页似乎并非所有内容都支持您的方法，因此请检查该页面上的兼容性列表；似乎是新 JavaScript 的未来版本，其中可能包含 OOP。
回答by Amit Joki
While for...in iterates over property names, for...of iterates over property values.
for...in 迭代属性名称，for...of 迭代属性值。
The above is what for...ofloop does. The below is its current status.
以上是for...of循环的作用。下面是它的当前状态。
This is an experimental technology, part of the Harmony (ECMAScript 6) proposal. Because this technology's specification has not stabilized, check the compatibilitytable for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future version of browsers as the spec changes.
这是一项实验性技术，是 Harmony (ECMAScript 6) 提案的一部分。由于此技术的规范尚未稳定，请查看兼容性表以了解在各种浏览器中的使用情况。另请注意，随着规范的变化，实验技术的语法和行为可能会在未来版本的浏览器中发生变化。
回答by Scimonster
回答by vincent gravitas
In the meantime, you could use something like this:
与此同时，你可以使用这样的东西：
for(element_idx in elements) {
element = elements[element_idx];
...
}
回答by Niet the Dark Absol
It's not.
不是。
Even if it were, it would be inappropriate to use it on an array.
即使是这样，在数组上使用它也是不合适的。
For arrays, you should always use a traditional forloop.
对于数组，您应该始终使用传统for循环。
You can, however, spice it up a bit:
但是，您可以稍微调味一下：
for( var i=0, l=nameArray.length, str=nameArray[0];
i<l;
i++,str=nameArray[i]) {
console.log(str.name);
}
