如何检测浏览器支持的JavaScript版本(如果有)?我想检查ECMAScript 3与ECMAScript 5对比ECMAScript 6。
注意:我想避免使用已弃用的language
代码。
答案 0 :(得分:20)
以下是一个很好的参考资料:http://www.docsteve.com/DocSteve/Samples/JS/js_version.html
基本上,使用脚本标记的弃用语言属性
<script language="javascript">var js_version="1.0"</script>
<script language="javascript1.1">var js_version="1.1"</script>
<script language="javascript1.2">var js_version="1.2"</script>
<script language="javascript1.3">var js_version="1.3"</script>
<script language="javascript1.4">var js_version="1.4"</script>
<script language="javascript1.5">var js_version="1.5"</script>
<script language="javascript1.6">var js_version="1.6"</script>
答案 1 :(得分:15)
解决方案提议http://www.docsteve.com/DocSteve/Samples/JS/js_version.html作为简单的JavaScript函数(使用&#34; createElement&#34;构造):
<script type="text/javascript">
function get_js_version ()
{
this.jsv = {
versions: [
"1.1", "1.2", "1.3", "1.4", "1.5", "1.6", "1.7", "1.8", "1.9", "2.0"
],
version: ""
};
var d = document;
for (i = 0; i < jsv.versions.length; i++) {
var g = d.createElement('script'),
s = d.getElementsByTagName('script')[0];
g.setAttribute("language", "JavaScript" + jsv.versions[i]);
g.text = "this.jsv.version='" + jsv.versions[i] + "';";
s.parentNode.insertBefore(g, s);
}
return jsv.version;
}
document.write('JavaScript Version: ' + get_js_version());
</script>
答案 2 :(得分:12)
我认为这取决于你想要对信息做什么,但很多人更喜欢进行特征检测,而不是弄清楚某人使用的浏览器或JS的版本。
查看Modernizr,这是一个很棒的库,可以为您进行功能检测。
答案 3 :(得分:8)
这会弹出一个警告框,其中包含浏览器使用的javascript版本:
<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 language="Javascript1.7">
jsver = 1.7;
</script>
<script language="Javascript1.8">
jsver = 1.8;
</script>
<script language="Javascript1.9">
jsver = 1.9;
</script>
<script type="text/javascript">
alert(jsver);
</script>