Question

var string = 'abcd+1';
var pattern = 'd+1'
var reg = new RegExp(pattern,'');
alert(string.search(reg));

I found out last night that if you try and find a plus sign in a string of text with a Javascript regular expression, it fails. It will not find that pattern, even though it exists in that string. This has to be because of a special character. What’s the best way to find a plus sign in a piece of text? Also, what other characters will this fail on?

Answer 1

Plus is a special character in regular expressions, so to express the character as data you must escape it by prefixing it with \.

var reg = /d\+1/;