How to detect javascript version conformance using javascript

Question

Is there a way to detect which version of javascript this engine has? on console and browsers

for example i want to know conformance of

/usr/bin/js
/usr/bin/node
/usr/bin/ringo
/usr/bin/rhino
/usr/bin/seed
/usr/bin/gjs 
and browsers i currently using, etc 

are they Javascript 1.8.5 compatible or not, or which version of javascript they had

Answer 1

Check the following similar scenario.Hope this helps

jQuery version compatibility detection

Thanks AB

• RobG: That answer is for jQuery, not javascript. The linked answer uses the jQuery version property (intuitively called "jquery"), there is no equivalent in javascript.

Answer 2

Try the following script to know the Javascript version

<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>

Check this jsFiddle http://jsfiddle.net/Ac6CT/

Thanks

AB