Regular Expression

• developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
• developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions
• developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp
• tc39.es/ecma262/multipage/text-processing.html#sec-regexp-regular-expression-objects