Example search engine: Match all words, in any order (#26971)

* match all words, in any order

* docs: match all words, in any order

docs/index.html

@@ -359,7 +359,9 @@
 
 		function escapeRegExp( string ) {
 
-			return string.replace( /[.*+?^${}()|[\]\\]/g, '\\$&' ); // https://stackoverflow.com/a/6969486/5250847
+			string = string.replace( /[.*+?^${}()|[\]\\]/g, '\\$&' ); // https://stackoverflow.com/a/6969486/5250847
+
+			return '(?=.*' + string.split( ' ' ).join( ')(?=.*' ) + ')'; // match all words, in any order
 
 		}
 

examples/index.html

@@ -253,7 +253,9 @@
 
 		function escapeRegExp( string ) {
 
-			return string.replace( /[.*+?^${}()|[\]\\]/g, '\\$&' ); // https://stackoverflow.com/a/6969486/5250847
+			string = string.replace( /[.*+?^${}()|[\]\\]/g, '\\$&' ); // https://stackoverflow.com/a/6969486/5250847
+
+			return '(?=.*' + string.split( ' ' ).join( ')(?=.*' ) + ')'; // match all words, in any order
 
 		}