正则表达式

RegExp 类型

test()

var a = /cat/g.test('catalog');

console.log(a) // true

var a = new RegExp('cat', 'g');

var b = a.test('catalog');

console.log(b); // true

exec()

var text = 'mom and dad and bady';

var pattern = /.om/g;

var matches = pattern.exec(text);

console.log(matches[0]); // mom