contains() in javascript code example

Example 1: check for substring javascript

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

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

Example 2: javascript string contains

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

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

Example 3: string contains in javascript

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

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

Example 4: js string contains

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

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

Example 5: javascript includes method

arr.includes(searchElement[, fromIndex = 0])