Js trim space: remove the leading and trailing spaces of strings respectively.

Remove spaces on the left and right of the string respectively.
Copy codeThe Code is as follows:
String. prototype. trim = function () {return this. replace (/^ \ s + | \ s + $/g ,"")}
String. prototype. ltrim = function () {return this. replace (/^ \ s +/g ,"")}
String. prototype. rtrim = function () {return this. replace (/\ s + $/g ,"")}

Adds a trim method to the String object.
You can use it as follows:
Copy codeThe Code is as follows:
Var s = "abc ";
S = s. trim (); // s is a String. You can use the trim method just defined.
Alert (s );