Question

Which of the following can be helpful in creating your own feature detect?

(a) Modernizr.addTest

(b) Modenizer.on

(c) Modernizr._domPrefixes

(d) Modernizr.atRule

I had been asked this question during an interview.

This interesting question is from Adding HTML features safely with Modernizr topic in section HTML Images & Web Page Files of HTML

Answer 1

The correct choice is (a) Modernizr.addTest

To explain: If you want to create your own feature detects you can simply use Modernizr.addTest, a string is passed generally in lowercase without any punctuation like Modernizr.addTest(feature, test). It returns the Boolean value. Modernizr._domPrefixes works same as _prefixes. Modernizr.atRule is one of modernizr API(Application Programming Interface) having syntax like – Modernizr.atRule(prop).