How to focus a paper-input with Polymer 1.0?

Question

This question is a follow-up to this one: polymer focus() on <paper-input> or <core-input> element

How can I focus in a paper-input element using the Javascript API ?

(using Polymer 1.0)

Answer 1

If you have an element:

<paper-input id="my-input" label="What's on your mind?"></paper-input>

paper-input is a wrapper for business logic and stylish of a more deep-down input element which you can reach through:

document.getElementById('my-input').$.input

To focus, just write:

document.getElementById('my-input').$.input.focus();