javascript functions not supported by any browser

Can anyone help me to list the JavaScript functions, which are not supported by any browser. Ex: Like map() function,this will supported in IE8 (you would have faced this type of problems in your development phases). i tried googling in documentation of browsers but i can't get it clearly.

Any help will be appreciated. Thanks in advance.

As RGraham commented

• caniuse.com
• kangax.github.io

Also

• pointedears.de
• robertnyman.com
• quirksmode.org
• compatibility.shwups-cms.ch - this is interesting

There is also a lib called Modernizr ^wiki intended to detect all available features of a browser. There is more useful information on the github page of the lib.