Saturday, February 23, 2013

how to trim a string using javascript

Many modern browsers (such as Firefox 3, Opera 11, Safari 5.x, Chrome 10, Internet Explorer 9 in standards mode) support the string.trim() method, which allows you to rewrite the above much shorter:

str = str.trim()

For browsers that do not support string.trim(), e.g. Internet Explorer 8 or earlier, you can add your own trim() method to string object's prototype by including the following script in the <HEAD> section of your page, prior to any script that uses string.trim():

if (!String.prototype.trim) {
 String.prototype.trim = function() {
  return this.replace(/^\s+|\s+$/g,'');


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