Modernizr just for one quick check?

Question

I want to check if the browser who's running my page is capable of handling the 'html 5 placeholder'

I know I can add the following javascript check:

!Modernizr.input.placeholder

but is it worth to import a library just for one check ?

also how does modernizr do that for me (i mean how is it implemented under the cover) ?

Answer 1

If you want to check for placeholder support, then all you need to do is;

var placeholderSupport = "placeholder" in document.createElement("input");

And to answer your other question; no, there is absolutely no point including the whole Modernizr library for 1 line of JS (Modernizr is 1000+ lines.... go figure :))*

^{*Yes, not minified, but the concept remains}

Answer 2

You could just get what you need from modernizr by just selecting "Input Attributes" for example and generate a build

http://www.modernizr.com/download/