javascript - In which browsers are regular expression literals created only once -


i'm reading through javascript patterns book, , 1 of examples regarding creation of regular expression literals not appear consistent chrome version 36.0.1985.125 on mac osx.

here's example

function getre() {     var re = /[a-z]/;     re.foo = "bar";     return re; }  var reg = getre(),     re2 = getre();  console.log(reg === re2); //true according book reg.foo = "baz"; console.log(re2.foo); //baz according book

in version of chrome, line 1 in console false, , line 2 still "bar"

they go on in es5 literal create new objects each time. version of chrome implement es5? , if so, thought browsers still on 3 minus few augmentations.


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