https://www.laruse.org/wp-content/plugins/bypass-iframe-height-limit/js/bypass.js?ver=5.8.17

1/**
2 * Bypass Iframe Height Limit
3 *
4 * Adapted from /wp-includes/js/wp-embed.js
5 */
6(function ( window, document ) {
7	'use strict';
8
9	var supportedBrowser = false;
10	
11	if ( document.querySelector ) {
12		if ( window.addEventListener ) {
13			supportedBrowser = true;
14		}
15	}
16
17	/** @namespace bihl */
18	window.bihl = window.bihl || {};
19
20	if ( !! window.bihl.BypassIframeHeightLimit ) {
21		return;
22	}
23
24	window.bihl.BypassIframeHeightLimit = function( e ) {
25		var data = e.data;
26		if ( ! ( data.secret || data.message || data.value ) ) {
27			return;
28		}
29
30		if ( /[^a-zA-Z0-9]/.test( data.secret ) ) {
31			return;
32		}
33
34		var iframes = document.querySelectorAll( 'iframe[data-secret="' + data.secret + '"]' ),
35			i, source, height, sourceURL, targetURL;
36
37		for ( i = 0; i < iframes.length; i++ ) {
38			source = iframes[ i ];
39
40			if ( e.source !== source.contentWindow ) {
41				continue;
42			}
43
44			if ( 'height' === data.message ) {
45				// we need to create a style element rather than using inline styles, 
46				// because wp-embed.js wipes out any inline styles
47				var styleElem = document.getElementById( 'bihl-style-' + source.getAttribute('data-secret') );
48				var css = 'iframe.wp-embedded-content[data-secret="' + source.getAttribute('data-secret') 
49					+ '"] { height: ' + parseInt( data.value, 10 ) + 'px; }';
50
51				if ( styleElem ) {
52					styleElem.innerHTML = css;
53				} else {
54					var head = document.head || document.getElementsByTagName('head')[0],
55					    style = document.createElement('style');
56
57					style.type = 'text/css';
58					style.id = 'bihl-style-' + source.getAttribute('data-secret');
59					style.appendChild( document.createTextNode(css) );
60
61					head.appendChild( style );
62				}
63			}
64
65		}
66	};
67
68	if ( supportedBrowser ) {
69		window.addEventListener( 'message', window.bihl.BypassIframeHeightLimit, false );
70	}
71})( window, document );