Javascript regex ending word not found

Question

In this regex , I need to match an ending word that starts with '(', ')' or ','.

Regex :

/[\(\),].*$/

For example, given the text (aaa,bbb)ccc I need to obtain )ccc. Still, it returns the entire text. What's wrong with this regex?

Answer 1

You can use:

'(aaa,bbb)ccc'.match(/[(),][^(),]+$/)
//=> [")ccc"]

[^(),]+ is negation pattern that matches any character but any listed in [^(),].

Problem with [(),].*$ is that it matches very first ( in input and matches till end.

Answer 2

You can also consider using capturing group while consuming all the characters up to the first (, ) or ,:

.*([(),].*)$

.* will consume as many characters as it can, then any character in this character class [(),], and then the rest of the characters up to the end.

The )ccc value will be stored in Group 1:

var re = /.*([(),].*)$/; 
var str = '(aaa,bbb)ccc';
 
if ((m = re.exec(str)) !== null) {
    document.getElementById("res").innerHTML = m[1];
}

<div id="res"/>