javascript 检查String是否包含一个Substring

Posted 2021-05-03

ES6
var string = "foo",
    substring = "oo";
string.includes(substring);

ES5
var string = "foo",
    substring = "oo";
string.indexOf(substring) !== -1;
String.prototype.indexOf returns the position of the string in the other string. 
If not found, it will return -1.