ES6 RegExp.prototype.sticky ES6 RegExp source ES6 RegExp exec() ES6 RegExp.prototype.sticky var str = "Javascript is an interesting scripting language"; var re = new RegExp( "script", "g" ); re.test(str); console.log("Test 1 - Current Index: " + re.lastIndex); re.test(str); console.log("Test 2 - Current Index: " + re.lastIndex) ES6 RegExp source ES6 RegExp exec()