check if contact of string present in another string javascript code example

Example 1: js string contais

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

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

Example 2: js check if string contains character

"FooBar".includes("oo"); // true

"FooBar".includes("foo"); // false

"FooBar".includes("oo", 2); // false