Left Trim in Javascript
javascript, regex, trim
Solution
Use:
String.prototype.leftTrim = function() {
return this.replace(/^\s+/,"");
}
In the regex the:
- ^ means "from the beginning of the string"
- \s means whitespace character class
- + means one-or more (greedy)
so....
- ^\s+ means "one or more consecutive whitespace characters from the beginning of the class"
Note: The `g` flag at the end of your regex is unnecessary as the anchors (^ and $) explicitly define what will match. There cannot be multiple matches.
See https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/RegExp for details on regex syntax in javascript
Problem
There are a lot of scripts out there to trim a string in JavaScript, but none that allow you to just left trim a string. This is what I use to trim: ``` String.prototype.trim = function() { return this.replace(/^\s+|\s+$/g,""); } ``` I would like to change this a little and create a new function called leftTrim that only removes the leading space.