Added support for JS BigInt literals (#1542)

Add support for BigInt literals to JS and languages extending or including JS.

components/prism-javascript.js

@@ -10,7 +10,7 @@ Prism.languages.javascript = Prism.languages.extend('clike', {
 		},
 		/\b(?:as|async|await|break|case|class|const|continue|debugger|default|delete|do|else|enum|export|extends|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]+|NaN|Infinity)\b|(?:\b\d+\.?\d*|\B\.\d+)(?:[Ee][+-]?\d+)?/,
+	'number': /\b(?:(?:0[xX][\dA-Fa-f]+|0[bB][01]+|0[oO][0-7]+)n?|\d+n|NaN|Infinity)\b|(?:\b\d+\.?\d*|\B\.\d+)(?:[Ee][+-]?\d+)?/,
 	// Allow for all non-ASCII characters (See http://stackoverflow.com/a/2008444)
 	'function': /[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*\(|\.(?:apply|bind|call)\()/,
 	'operator': /-[-=]?|\+[+=]?|!=?=?|<<?=?|>>?>?=?|=(?:==?|>)?|&[&=]?|\|[|=]?|\*\*?=?|\/=?|~|\^=?|%=?|\?|\.{3}/

prism.js

@@ -736,7 +736,7 @@ Prism.languages.javascript = Prism.languages.extend('clike', {
 		},
 		/\b(?:as|async|await|break|case|class|const|continue|debugger|default|delete|do|else|enum|export|extends|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]+|NaN|Infinity)\b|(?:\b\d+\.?\d*|\B\.\d+)(?:[Ee][+-]?\d+)?/,
+	'number': /\b(?:(?:0[xX][\dA-Fa-f]+|0[bB][01]+|0[oO][0-7]+)n?|\d+n|NaN|Infinity)\b|(?:\b\d+\.?\d*|\B\.\d+)(?:[Ee][+-]?\d+)?/,
 	// Allow for all non-ASCII characters (See http://stackoverflow.com/a/2008444)
 	'function': /[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*\(|\.(?:apply|bind|call)\()/,
 	'operator': /-[-=]?|\+[+=]?|!=?=?|<<?=?|>>?>?=?|=(?:==?|>)?|&[&=]?|\|[|=]?|\*\*?=?|\/=?|~|\^=?|%=?|\?|\.{3}/

tests/languages/javascript/number_feature.test

@@ -9,6 +9,8 @@
 0xBABE
 NaN
 Infinity
+123n
+0x123n
 
 ----------------------------------------------------
 
@@ -23,10 +25,12 @@ Infinity
 	["number", "0xbabe"],
 	["number", "0xBABE"],
 	["number", "NaN"],
-	["number", "Infinity"]
+	["number", "Infinity"],
+	["number", "123n"],
+	["number", "0x123n"]
 ]
 
 ----------------------------------------------------
 
 Checks for decimal numbers, binary numbers, octal numbers, hexadecimal numbers.
-Also checks for keywords representing numbers.
+Also checks for keywords representing numbers.