Check if the array includes a certain value: `includes()`

Check if the array includes a certain value: includes()

If you want to check if the array includes a specific value, you can use include() method. The first mandatory input argument of include() method is the value of the element you want to check.

const elements = ['kiwi', 'strawberry', 'lemon']

console.log(elements.includes('strawberry'))
// Does the array include the 'strawberry'?
// expected output: true

If you want to check if the value is included starting from a specific index you can use the second input parameter for setting the index (remember to start from 0 for counting the position).

const elements = ['kiwi', 'strawberry', 'lemon']

console.log(elements.includes('strawberry'), 2)
// Does the array starting from index 2, include the 'strawberry'?
// expected output: false