如何在JavaScript中检查字符串是否包含子字符串?

这里有一个可用方法列表:

1. (ES6) includes

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

2. ES5 and older indexOf

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.

3. search

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

4. lodash includes

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

5. RegExp

var string = "foo",
    expr = /oo/;  // no quotes here
expr.test(string);

6. Match

var string = "foo",
    expr = /oo/;
string.match(expr);

性能测试表明，如果速度很重要，indexOf可能是最好的选择。