https://spbtk.ru/wp-includes/js/wp-embed.js?ver=4.9.3

1/**
2 * WordPress inline HTML embed
3 *
4 * @since 4.4.0
5 *
6 * This file cannot have ampersands in it. This is to ensure
7 * it can be embedded in older versions of WordPress.
8 * See https://core.trac.wordpress.org/changeset/35708.
9 */
10(function ( window, document ) {
11	'use strict';
12
13	var supportedBrowser = false,
14		loaded = false;
15
16		if ( document.querySelector ) {
17			if ( window.addEventListener ) {
18				supportedBrowser = true;
19			}
20		}
21
22	/** @namespace wp */
23	window.wp = window.wp || {};
24
25	if ( !! window.wp.receiveEmbedMessage ) {
26		return;
27	}
28
29	window.wp.receiveEmbedMessage = function( e ) {
30		var data = e.data;
31		if ( ! ( data.secret || data.message || data.value ) ) {
32			return;
33		}
34
35		if ( /[^a-zA-Z0-9]/.test( data.secret ) ) {
36			return;
37		}
38
39		var iframes = document.querySelectorAll( 'iframe[data-secret="' + data.secret + '"]' ),
40			blockquotes = document.querySelectorAll( 'blockquote[data-secret="' + data.secret + '"]' ),
41			i, source, height, sourceURL, targetURL;
42
43		for ( i = 0; i < blockquotes.length; i++ ) {
44			blockquotes[ i ].style.display = 'none';
45		}
46
47		for ( i = 0; i < iframes.length; i++ ) {
48			source = iframes[ i ];
49
50			if ( e.source !== source.contentWindow ) {
51				continue;
52			}
53
54			source.removeAttribute( 'style' );
55
56			/* Resize the iframe on request. */
57			if ( 'height' === data.message ) {
58				height = parseInt( data.value, 10 );
59				if ( height > 1000 ) {
60					height = 1000;
61				} else if ( ~~height < 200 ) {
62					height = 200;
63				}
64
65				source.height = height;
66			}
67
68			/* Link to a specific URL on request. */
69			if ( 'link' === data.message ) {
70				sourceURL = document.createElement( 'a' );
71				targetURL = document.createElement( 'a' );
72
73				sourceURL.href = source.getAttribute( 'src' );
74				targetURL.href = data.value;
75
76				/* Only continue if link hostname matches iframe's hostname. */
77				if ( targetURL.host === sourceURL.host ) {
78					if ( document.activeElement === source ) {
79						window.top.location.href = data.value;
80					}
81				}
82			}
83		}
84	};
85
86	function onLoad() {
87		if ( loaded ) {
88			return;
89		}
90
91		loaded = true;
92
93		var isIE10 = -1 !== navigator.appVersion.indexOf( 'MSIE 10' ),
94			isIE11 = !!navigator.userAgent.match( /Trident.*rv:11\./ ),
95			iframes = document.querySelectorAll( 'iframe.wp-embedded-content' ),
96			iframeClone, i, source, secret;
97
98		for ( i = 0; i < iframes.length; i++ ) {
99			source = iframes[ i ];
100
101			if ( ! source.getAttribute( 'data-secret' ) ) {
102				/* Add secret to iframe */
103				secret = Math.random().toString( 36 ).substr( 2, 10 );
104				source.src += '#?secret=' + secret;

105				source.setAttribute( 'data-secret', secret );
106			}
107
108			/* Remove security attribute from iframes in IE10 and IE11. */
109			if ( ( isIE10 || isIE11 ) ) {
110				iframeClone = source.cloneNode( true );
111				iframeClone.removeAttribute( 'security' );
112				source.parentNode.replaceChild( iframeClone, source );
113			}
114		}
115	}
116
117	if ( supportedBrowser ) {
118		window.addEventListener( 'message', window.wp.receiveEmbedMessage, false );
119		document.addEventListener( 'DOMContentLoaded', onLoad, false );
120		window.addEventListener( 'load', onLoad, false );
121	}
122})( window, document );