javaScript:在数组中的最后一组值之后可以出现逗号吗? [英] javaScript: Can a comma occur after the last set of values in an array?

问题描述

我想知道在 javascript 中尾随数组的逗号是否有效?

I am wondering if a comma trailing an array in javascript is valid?

var settings = {
    'foo'  : oof,
    'bar' : rab,
};

对比

var settings = {
    'foo'  : oof,
    'bar' : rab
};

请注意，第二个示例的最后一个键/值后没有逗号.

Note the second example does not have a comma after the last key/value.

推荐答案

大多数浏览器和实现都允许尾随逗号，大的 BUT 是Internet Explorer".

Most browsers and implementations do allow a trailing comma, the big BUT is the "Internet Explorer".

大多数 InternetExplorer 版本中的尾随逗号会导致大麻烦.它会抛出怪异、疯狂、奇怪和不合理的错误 ..你不知道自己在哪里！这可怕，你会陷入深度和严重的抑郁.这种疾病还有一个名字，厄运的邪恶逗号"，它曾被称为一次.

A trailing comma in most InternetExplorer versions causes BIG trouble. It'll throw wierd, crazy, strange and unreasonable errors .. you have no idea where you're at! This is terrible, you'll fall into deep and serious depressions. The disease also has a name, "evil comma of doom" it was called once.

结论:永远……永远！在 Javascript 中使用尾随逗号.

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