regex - javascript replace() function strange behaviour with regexp -


am doing sth wrong or there problem js replace ?

<input type="text" id="a" value="(55) 55-55-55" />​  document.write($("#a").val().replace(/()-/g,''));​  prints (55) 555555

http://jsfiddle.net/yb2yv/

how can replace () , spaces too?

in javascript regular expression, ( , ) characters have special meaning. if want list them literally, put backslash (\) in front of them.

if goal rid of (, ), -, , space characters, character class combined alternation (e.g., either-or) on \s, stands "whitespace":

document.write($("#a").val().replace(/[()\-]|\s/g,''));​

(i didn't put backslashes in front of () because don't need within character class. did put 1 in front of - because within character class, - has special meaning.)

alternately, if want rid of anything isn't digit, can use \d:

document.write($("#a").val().replace(/\d/g,''));​

\d means "not digit" (note it's capital, \d in lower case opposite [any digit]).

more info on mdn page on regular expressions.


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