Javascript String includes()

The includes() method checks if one string can be found inside another string.


const message = "JavaScript is fun";

// check if message includes the string "Java" let result = message.includes("Java");
console.log(result); // Output: true

includes() Syntax

The syntax of the includes() method is:

str.includes(searchString, position)

Here, str is a string.

includes() Parameters

The includes() method takes in:

  • searchString - A string to be searched for within str.
  • position (optional) - The position within str to begin searching for searchString. By default, it is 0.

includes() Return Value

  • Returns true if searchString is found anywhere within str.
  • Returns false if searchString is not found anywhere within str.

Note: The includes() method is case sensitive.

Example: Using includes() method

let sentence = "Java is to JavaScript what Car is to Carpet.";

let check = sentence.includes("Java");
console.log(check); // true // case sensitive let check1 = sentence.includes("java"); console.log(check1); // false // second argument specifies position to start at
let check2 = sentence.includes("Java", 20);
console.log(check2); // false
let check3 = sentence.includes("whose");
console.log(check3); // false let check4 = sentence.includes(""); console.log(check4); // true



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