Javascript String doesn't have trim method ?

[ualex]

I was trying:

<script>

function testtrim(value) {
	
	alert(value.trim());
	
}

testtrim("Alex ");
</script>

The javascript don't work, my firebugs says:[value.trim is not a function]
how to simulate an trim function ?

thanks.

[stymiee]

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

[ualex]

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

hum... it cool... the javascript allow you add new method dynamically ?

String.prototype.trim what mean it ?

thanks.

[Skibum1321]

Yes, as with any programming language you can define your own functions. The one below is actually from the prototype javascript library. If you use that library (just a bunch of prewritten functions to make your life easier), then you will get that function and many others.

[stymiee]

hum... it cool... the javascript allow you add new method dynamically ?

String.prototype.trim what mean it ?

thanks.

By assigning the trim function to the String prototype you are making it available to all strings in your code. Do a search for "prototype" in javascript. It's good stuff to know.