Setup
There are 2 ways to initialise the component.
Automatic
Add data-ecl-auto-init="Popover" attribute to component's markup:
<div class="ecl-popover" data-ecl-popover data-ecl-auto-init="Popover">...</div>
Use the ECL library's autoInit() (ECL.autoInit()) when your page is ready or other custom event you want to hook onto.
Manual
Get target element, create an instance and invoke init().
Given you have 1 element with an attribute data-ecl-popover on the page:
var elt = document.querySelector('[data-ecl-popover]');
var popover = new ECL.Popover(elt);
popover.init();
Retrieve an existing instance
If an existing instance needs to be updated, it can be retrieved this way:
var elt = document.querySelector('[data-ecl-popover]');
var instance = ECL.components.get(elt);