Capitalize the first letter of every word

Question

I want to use a javascript function to capitalize the first letter of every word

eg:

THIS IS A TEST ---> This Is A Test
this is a TEST ---> This Is A Test
this is a test ---> This Is A Test

What would be a simple javascript function

Answer 1

Here's a little one liner that I'm using to get the job done

var str = 'this is an example';
str.replace(/\b./g, function(m){ return m.toUpperCase(); });

but John Resig did a pretty awesome script that handles a lot of cases http://ejohn.org/blog/title-capitalization-in-javascript/

Update

ES6+ answer:

str.split(' ').map(s => s.charAt(0).toUpperCase() + s.slice(1)).join(' ');

There's probably an even better way than this. It will work on accented characters.