Javascript String includes()

 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

Output

 true false false false true

Also Read:

• JavaScript String indexOf()
• JavaScript Array includes()
• JavaScript Program to Check Whether a String Contains a Substring