[JS]子字串包含

const string = "foo";
const substring = "oo";

console.log(string.includes(substring));

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ie support

var string = "foo";
var substring = "oo";

console.log(string.indexOf(substring) !== -1);

https://stackoverflow.com/questions/1789945/how-to-check-whether-a-string-contains-a-substring-in-javascript