javascript - Regex replace unterminated parenthetical -

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i want replace unnecessary breaks in string. have written regex replace throws error: syntaxerror: unterminated parenthetical

var str = "<h1>sdflk</h1><br><br><br><br><p>test</p><br><br><br><br>"; str.replace(/((</[a-za-z0-9]+>)(<br>)+)/,"\$2");

but don't see missing parenthese.

you must add \ before / in re:

/((<\/[a-za-z0-9]+>)(<br>)+)/

another option use regexp:

re = new regexp("((</[a-za-z0-9]+>)(<br>)+)"); "<h1>sdflk</h1><br><br><br><br><p>test</p><br><br><br><br>".replace(re,"\$1");

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