https://www.zah-hildesheim.de/wp-content/plugins/beaver-builder-li…/custom-elements/fl-element.js?ver=2.11.0.5

1class FLElement extends HTMLElement {
2
3	/**
4	 * Property to store a template element
5	 */
6	template = null
7
8	/**
9 	* Function to unbind event listeners. Meant to be replaced by returning a function from bindEvents().
10 	*/
11	unbindEventsCallback = () => {}
12
13	/**
14	 * A collection of defaults for localized strings to be merged with the strings attribute.
15	 */
16	defaultStrings = {}
17
18	/**
19	 * Array of attributes to watch for changes
20	 *
21	 * @return Array
22	 */
23	static get observedAttributes() {
24		return [ 'strings' ]
25	}
26
27	/*
28	 * Sets up a template element for use later.
29	 *
30	 * @return void
31	 */
32	constructor() {
33		super()
34		this.template = document.createElement( 'template' )
35	}
36
37	/**
38	 * This is a stub to be overridden in subclasses
39	 *
40	 * @return Function
41	 */
42	bindEvents() {
43		return this.unbindEventsCallback
44	}
45
46	/**
47	 * Override to assign unbind callback
48	 */
49	connectedCallback() {
50
51		/**
52		 * To enable a cleanup callback in bindEvents()
53		 * you need to assign it when the element is connected to the DOM.
54		 * This allows you to return a function from bindEvents() that will
55		 * be called on disconnect. Use it to remove any event listeners you added.
56		 */
57		this.unbindEventsCallback = this.bindEvents()
58	}
59
60	/**
61	 * Fires when element is disconnected from DOM
62	 *
63	 * @return void
64	 */
65	disconnectedCallback() {
66		if ( 'function' === typeof this.unbindEventsCallback ) {
67			this.unbindEventsCallback()
68		}
69	}
70
71	/**
72	 * Getter for strings property. Merges defaults with strings attribute
73	 *
74	 * @return Object
75	 */
76	get strings() {
77		return {
78			...this.defaultStrings,
79			...JSON.parse( this.getAttribute( 'strings' ) )
80		}
81	}
82}