includes() Method in Javascript

Javascript  |     |  

In Javascript, There is includes() powerful method which is separately used in array and string expressions.

includes() Method at string expressions:

Usage: str.includes(searchvalue, start)

includes() method returns true if string expression has specified value. includes() method is case sensitive.

let text = "My name is etem, this website awesome.";
let result = text.includes("etem");
console.log(result); // Output: true
result = text.includes("Etem");
console.log(result); // Output: false

includes() Method at array expressions:

includes() method returns true if array has specified value. 

const array1 = [1, 2, 3];
let result = array1.includes(2);
console.log(result); // Output: true
result = array1.includes(5);
console.log(result); // Output: false
array1.includes(3, -1)
console.log(result); // Output: true

When using at array expressions, includes() method can take negative value as second parameter.

Good luck…