JavaScript: Regexp optimisation + don't use captures if not needed

components/prism-javascript.js

@@ -1,6 +1,6 @@
 Prism.languages.javascript = Prism.languages.extend('clike', {
-	'keyword': /\b(as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|var|void|while|with|yield)\b/,
-	'number': /\b-?(0[xX][\dA-Fa-f]+|0[bB][01]+|0[oO][0-7]+|\d*\.?\d+([Ee][+-]?\d+)?|NaN|Infinity)\b/,
+	'keyword': /\b(?:as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|var|void|while|with|yield)\b/,
+	'number': /\b-?(?:0[xX][\dA-Fa-f]+|0[bB][01]+|0[oO][0-7]+|\d*\.?\d+(?:[Ee][+-]?\d+)?|NaN|Infinity)\b/,
 	// Allow for all non-ASCII characters (See http://stackoverflow.com/a/2008444)
 	'function': /[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*(?=\s*\()/i,
 	'operator': /-[-=]?|\+[+=]?|!=?=?|<<?=?|>>?>?=?|=(?:==?|>)?|&[&=]?|\|[|=]?|\*\*?=?|\/=?|~|\^=?|%=?|\?|\.{3}/
@@ -21,7 +21,7 @@ Prism.languages.insertBefore('javascript', 'keyword', {
 
 Prism.languages.insertBefore('javascript', 'string', {
 	'template-string': {
-		pattern: /`(?:\\\\|\\?[^\\])*?`/,
+		pattern: /`(?:\\[\s\S]|[^\\`])*`/,
 		greedy: true,
 		inside: {
 			'interpolation': {

prism.js

@@ -685,8 +685,8 @@ Prism.languages.clike = {
 ********************************************** */
 
 Prism.languages.javascript = Prism.languages.extend('clike', {
-	'keyword': /\b(as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|var|void|while|with|yield)\b/,
-	'number': /\b-?(0[xX][\dA-Fa-f]+|0[bB][01]+|0[oO][0-7]+|\d*\.?\d+([Ee][+-]?\d+)?|NaN|Infinity)\b/,
+	'keyword': /\b(?:as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|var|void|while|with|yield)\b/,
+	'number': /\b-?(?:0[xX][\dA-Fa-f]+|0[bB][01]+|0[oO][0-7]+|\d*\.?\d+(?:[Ee][+-]?\d+)?|NaN|Infinity)\b/,
 	// Allow for all non-ASCII characters (See http://stackoverflow.com/a/2008444)
 	'function': /[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*(?=\s*\()/i,
 	'operator': /-[-=]?|\+[+=]?|!=?=?|<<?=?|>>?>?=?|=(?:==?|>)?|&[&=]?|\|[|=]?|\*\*?=?|\/=?|~|\^=?|%=?|\?|\.{3}/
@@ -707,7 +707,7 @@ Prism.languages.insertBefore('javascript', 'keyword', {
 
 Prism.languages.insertBefore('javascript', 'string', {
 	'template-string': {
-		pattern: /`(?:\\\\|\\?[^\\])*?`/,
+		pattern: /`(?:\\[\s\S]|[^\\`])*`/,
 		greedy: true,
 		inside: {
 			'interpolation': {