The first thing that you notice in the People picker control is its autocomplete feature. Yeah!! You are spot on?!. SharePoint 2013 has revamped its people picker with the autocomplete feature. There won't be any check name or resolve names. It's a good news, isn't it?
In Order to achieve this feat, Microsoft has come up with the following files, located in the 15 hive.
- clientform.js
- clientpeoplepicker.js
- autofill.js
Take a look at the sample below: