The trim() method removes whitespace from both sides of a string:
Example
var str = " Hello World! ";
alert(str.trim());
alert(str.trim());
The trim() method is not supported in Internet Explorer 8 or lower.
If you need to support IE 8, you can use replace() with a regular expression instead:
Example
var str = " Hello World! ";
alert(str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, ''));
alert(str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, ''));
You can also use the replace solution above to add a trim function to the JavaScript String.prototype:
Example
if (!String.prototype.trim) {
String.prototype.trim = function () {
return this.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
};
}
var str = " Hello World! ";
alert(str.trim());
String.prototype.trim = function () {
return this.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
};
}
var str = " Hello World! ";
alert(str.trim());
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