[JS] RegExp match & test

var str = "The rain in SPAIN stays mainly in the plain";
var res = str.match(/ain/g);

https://www.w3schools.com/jsref/jsref_match.asp

JavaScript String match() Method

const str = 'table football';
const regex = RegExp('foo*');

console.log(regex.test(str));
// expected output: true

https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/RegExp/test

RegExp.prototype.test()

https://developer.mozilla.org/ko/docs/Web/JavaScript/Guide/%EC%A0%95%EA%B7%9C%EC%8B%9D

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