Node.prototype.getRootNode polyfill

Polyfill for the new DOM method Node.prototype.getRootNode as defined
by the DOM specification

Install

npm install --save get-root-node-polyfill

Usage

``javascript
// Implement the method if it does not already exist:
require('get-root-node-polyfill/implement');
aDiv.getRootNode({ composed: false }); // options are optional, defaults to composed = false.

// Get the method without touching Node.prototype
const getRootNode = require('get-root-node-polyfill');
getRootNode.call(aDiv, { composed: false });

// Check if the method is available on Node.prototype.
const isImplemented = require('get-root-node-polyfill/is-implemented');
isImplemented(); // true if the method is available
``