https://businessradiox.com/wp-content/mu-plugins/rainmaker/library…/assets/js/protect-underscore.js?ver=3.8.4

1/**
2 * Rainmaker - Underscore.js Protection
3 *
4 * Protects WordPress Underscore.js from being overwritten by third-party
5 * scripts like SumoMe/BDOW (which bundles Lodash 4.x).
6 *
7 * Problem: SumoMe overwrites the global _ with Lodash 4.x, which removed
8 * the third "thisArg" parameter from _.each(), _.every(), _.some(), etc.
9 * This breaks Ninja Forms Conditional Logic which relies on that parameter.
10 */
11( function( window, document ) {
12	'use strict';
13
14	/*
15	 * WP core also assigns its own Lodash 4.x to window._, but hands it back on
16	 * the very next line through the inline `window.lodash = _.noConflict();`
17	 * that follows the file. Blocking that assignment aborts the handshake and
18	 * leaves window._ undefined, so no Ninja Form renders at all (sc-26068).
19	 * Core's Lodash has to be let through; every other one is diverted.
20	 */
21	var CORE_LODASH_SRC = /\/wp-includes\/js\/dist\/vendor\/lodash(\.min)?\.js/;
22
23	function isLodashFour( value ) {
24		return !! value && 'string' === typeof value.VERSION && 0 === value.VERSION.indexOf( '4.' );
25	}
26
27	var underscore = window._;
28
29	// Underscore was already overwritten before this ran and we never saw its
30	// reference, so leave the page alone rather than pin the wrong library.
31	if ( ! underscore || isLodashFour( underscore ) ) {
32		return;
33	}
34
35	var current = underscore;
36
37	window._lodash = window._lodash || null;
38
39	function isCoreLodash() {
40		var script = document.currentScript;
41
42		return !! script && !! script.src && CORE_LODASH_SRC.test( script.src );
43	}
44
45	function handBackUnderscore() {
46		if ( isLodashFour( current ) ) {
47			current = underscore;
48		}
49	}
50
51	/*
52	 * Optimizers can delay the inline handshake past the Lodash file, or drop
53	 * it entirely. Waiting for DOMContentLoaded covers the delayed case —
54	 * deferred scripts all run before it — and the never-runs case falls back
55	 * to the timeout.
56	 */
57	function scheduleHandBack() {
58		if ( 'loading' === document.readyState ) {
59			document.addEventListener( 'DOMContentLoaded', handBackUnderscore );
60		} else {
61			window.setTimeout( handBackUnderscore, 0 );
62		}
63	}
64
65	try {
66		Object.defineProperty( window, '_', {
67			get: function() {
68				return current;
69			},
70			set: function( value ) {
71				if ( isLodashFour( value ) ) {
72					/*
73					 * Stash every Lodash 4, core included: besides keeping it
74					 * reachable, this arms the window.lodash trap below — if a
75					 * delayed handshake stores Underscore there after the
76					 * hand-back, the substitution needs this reference.
77					 */
78					window._lodash = value;
79
80					if ( isCoreLodash() ) {
81						current = value;
82
83						// Hand Underscore back if the handshake never comes.
84						scheduleHandBack();
85					}
86
87					return;
88				}
89
90				// Never let _ be cleared: an undefined _ breaks Ninja Forms just
91				// as badly as a Lodash one.
92				if ( value ) {
93					current = value;
94				}
95			},
96			configurable: true
97		} );
98	} catch ( e ) {
99		// window._ is already locked by another script, leave the page alone.
100	}
101
102	/*
103	 * When a script aggregator repackages the page, the diverted Lodash never
104	 * reaches the handshake and `window.lodash = _.noConflict();` stores
105	 * Underscore instead — crashing Yoast and any other window.lodash consumer
106	 * that runs before we could repair it. Trap window.lodash too: if something
107	 * assigns a non-Lodash there while we hold a diverted Lodash 4, substitute
108	 * the real one, synchronously. Deliberately clearing window.lodash (or a
109	 * future non-4.x Lodash) gets substituted too while the stash is armed —
110	 * accepted: that permissiveness is what makes the aggregate rescue work.
111	 */
112	var lodashGlobal = window.lodash;
113
114	try {
115		Object.defineProperty( window, 'lodash', {
116			get: function() {
117				return lodashGlobal;
118			},
119			set: function( value ) {
120				if ( ! isLodashFour( value ) && isLodashFour( window._lodash ) ) {
121					value = window._lodash;
122				}
123
124				lodashGlobal = value;
125			},
126			configurable: true
127		} );
128	} catch ( e ) {
129		// Same as above: locked by another script, leave it alone.
130	}
131}( window, document ) );