告诉你的浏览器的JavaScript版本 [英] To tell Javascript version of your browser
问题描述
我从 http://javascript.about.com/library/bljver下面的脚本。 HTM
<script type="text/javascript">
var jsver = 1.0;
</script>
<script language="Javascript1.1">
jsver = 1.1;
</script>
<script language="Javascript1.2">
jsver = 1.2;
</script>
<script language="Javascript1.3">
jsver = 1.3;
</script>
<script language="Javascript1.4">
jsver = 1.4;
</script>
<script language="Javascript1.5">
jsver = 1.5;
</script>
<script language="Javascript1.6">
jsver = 1.6;
</script>
<script type="text/javascript">
document.write('<p><b>Javascript version ' + jsver + ' supported<\/b><\/p>');
</script>
但不知道是否有一个较短的方式？
but wonder if there is a shorter way?
推荐答案
综观评论你<一做href=\"http://stackoverflow.com/questions/3242109/to-tell-javascript-version-of-your-browser/3242127#3242127\">@meder,我会强烈建议你去的特征检测的，例如，以检测是否在的indexOf 法可在Array对象：
Looking at the comment you made to @meder, I would highly recommend you to go for feature detection, for example, to detect if the indexOf method is available on Array objects:
if (typeof Array.prototype.indexOf == 'function') {
//...
}
的的JavaScript（TM）的版本号指的 Mozilla的实施ECMAScript标准的
在早些年，当语言属性被广泛使用，例如，你可以指定JavaScript1.2放置这对ECMAScript的2书面code，但我不会今天推荐你这种方法。
In the early years, when the language attribute was widely used, you could for example specify "JavaScript1.2" to place code that was written for ECMAScript 2, but I wouldn't recommend you this approach nowadays.
您可能要指定的的JavaScript（TM）的版本的唯一原因，是因为你真的需要使用的 Mozilla的特定扩展，<一个href=\"http://stackoverflow.com/questions/2356830/what-browsers-currently-support-javascripts-let-keyword/2356926#2356926\">for例如，从而让关键字，发电机，迭代器，前pression封闭等...
The only reason you might want to specify a JavaScript(TM) version, is because you really need to use a Mozilla-specific extension, for example the let keyword, generators, iterators, expression closures, etc...
另请参阅：
- Which Javascript version(s) does IE8 supports?
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