Trimming Whitespace from the Ends of a String

1.10.trimming_whitespace_from_the_ends_of_a_string.js

// Using the trim method (trimLeft and trimRight methods also exist)

var txtBox = document.getElementById("test");
var line = txtBox.value.split("\n");
var resultString = "";

for (var i=0; i < lines.length; i++) {
  var strng = lines[i].trim();
  resultString += strng + "-";
}
alert(resultString);

// Workaround in case trim method not supported in browser (pre ECMAScript 5)
// adding customised trim method to the String object
// Subsequently call the trim method on any String
if (typeof String.trim == "undefined") {
  String.prototype.trim = function () {
    return this.replace(/(^\s*)|(\s*$)/g, "");
  }
}