es6怎么判断字符串中是否有某个字符串

str.includes(searchString[, position])

'Blue Whale'.includes('Blue'); // returns true
'Blue Whale'.includes('blue'); // returns false

require('es6-shim')

var string = "foo",
    substring = "oo";
if(string.indexOf(substring) == -1) {
  console.log("不包含子字符串")
} else {
  console.log("包含子字符串")
}

var string = "foo",
    exp = /oo/;
var result = exp.test(string);

var string = "foo",
    exp = /oo/;
var result = string.match(exp);
console.log(result);

["oo", index: 1, input: "foo"]

var string = "foo",
    exp = /oo/;
var result = string.search(exp);