How do I know which version of Javascript I m using

Question

I m just reading this documentation about Javascript 1 2  but I m wondering which version of Javascript is being used in the most popular browsers   http   www tutorialspoint com javascript javascript nested functions htm

User · Answer

Rather than finding which version you are using you can rephrase your question to "which version of ECMA script does my browser's JavaScript/JSscript engine conform to".

For IE :

alert(@_jscript_version);      //IE

Refer Squeegy's answer for non-IE versions :)

User · Answer

All of todays browsers use at least version 1 5  http   en wikipedia org wiki ECMAScript Dialect  Concerning your tutorial site  the information there seems to be extremely outdated  I beg you to head over to MDC and read their Guide  https   developer mozilla org en JavaScript Guide  You may still want to watch out for features which require version 1 6 or above  as this might give Internet Explorer some troubles

User · Answer

JavaScript 1 2 was introduced with Netscape Navigator 4 in 1997  That version number only ever had significance for Netscape browsers  For example  Microsoft s implementation  as used in Internet Explorer  is called JScript  and has its own version numbering which bears no relation to Netscape s numbering

User · Answer

Wikipedia  or rather  the community on Wikipedia  keeps a pretty good up-to-date list here      Most browsers are on 1 5  though they have features of later versions  Mozilla progresses with every dot release  they maintain the standard so that s not surprising  Firefox 4 is on JavaScript 1 8 5 The other big off-the-beaten-path one is IE9  - it implements ECMAScript 5  but doesn t implement all the features of JavaScript 1 8 5  not sure what they re calling this version of JScript  engine codenamed Chakra  yet

User · Answer

In chrome you can find easily not only your JS version but also a flash version  All you need is to type chrome   version  in a command line and you will get something like this

User · Answer

Click on this link to see which version your BROWSER is using  http   jsfiddle net Ac6CT   You should be able filter by using script tags to each JS version    lt script type  text javascript  gt    var jsver   1 0   lt  script gt   lt script language  Javascript1 1  gt    jsver   1 1   lt  script gt   lt script language  Javascript1 2  gt    jsver   1 2   lt  script gt   lt script language  Javascript1 3  gt    jsver   1 3   lt  script gt   lt script language  Javascript1 4  gt    jsver   1 4   lt  script gt   lt script language  Javascript1 5  gt    jsver   1 5   lt  script gt   lt script language  Javascript1 6  gt    jsver   1 6   lt  script gt   lt script language  Javascript1 7  gt    jsver   1 7   lt  script gt   lt script language  Javascript1 8  gt    jsver   1 8   lt  script gt   lt script language  Javascript1 9  gt    jsver   1 9   lt  script gt    lt script type  text javascript  gt    alert jsver    lt  script gt    My Chrome reports 1 7  Blatantly stolen from  http   javascript about com library bljver htm

[javascript] How do I know which version of Javascript I'm using?

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