js check if in string code example

Example 1: if string javascript

if (typeof myVar === 'string') { /* code */ };

Example 2: check for substring javascript

const string = "javascript";
const substring = "script";

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

Example 3: string contains in javascript

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

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