regex - Could anyone give an explain on following javascript RE code? -

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could give explain on following example code? it's last example here.

not sure why there's no '\' before '.' , can same result adding '\'.

javascript:

var url = "http://xxx.domain.com"; print(/[^.]+/.exec(url)[0].substr(7)); // prints "xxx"

note paragraph here regarding metacharacters inside character classes

note special characters or metacharacters inside character class closing bracket (]), backslash (\), caret (^) , hyphen (-). usual metacharacters normal characters inside character class, , not need escaped backslash.


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