JavaScript Program to Check if Two Strings are Same or Not

In this article, we are going to implement a JavaScript program to check whether two strings are the same or not. If they are the same then we will return true else we will return false.

Examples:

Input: str1 = Geeks, str2 = Geeks
Output: True. Strings are the Same
Input: str1 = Geeks, str2 = Geek
Output: False. Strings are not Same

Using localCompare() Method

In this approach, we are using the localCompare() method in JavaScript. This method is mainly used to compare the two strings according to their locale-specific collation order. If the strings are the same, then 0 is returned; otherwise, -1 or 1 is returned.

Syntax:

str1.localeCompare(str2)

Example: This example shows the use of the above-explained approach.

Javascript

const sameStrings = (
    inputString1,
    inputString2) => {
    return (
        inputString1.localeCompare(
            inputString2 ) === 0
  );};
console.log(
    sameStrings("Geeks", "Geeks")
);

Output

true

Using startsWith() and endsWith() Methods

In this approach, we are using the startsWith() and endsWith() methods in JavaScript. Here, we are checking if str1 starts and ends with str2. If both considerations are satisfied, then the strings are the same when they are not the same.

Syntax:

 str1.startsWith(str2) && str1.endsWith(str2)

Example: This example shows the use of the above-explained approach.

Javascript

const stringsSame = (
    inputString1,
    inputString2) => {
    return (
        inputString1.startsWith(
            inputString2
        ) &&
        inputString2.endsWith(
            inputString1
        )
    );};
console.log(
    stringsSame("Geeks", "Geeks")
);

Output

true

Using the String.prototype.match() Method

In this approach, we are using the match() method along with the regular expression. Here we are checking if str1 is the same as str2 using the regular expression pattern. If they are the same, then the true message is printed; otherwise, the false method is printed.

Syntax:

str1.match(new RegExp(`^${str2}$`)) !== null 

Example: This example shows the use of the above-explained approach.

Javascript

const sameString = (
      inputString1,
      inputString2) => {
    return (
        inputString1.match(
            new RegExp(
                `^${inputString2}$`
            )
        ) !== null
);};
console.log(
    sameString("geeks", "geeks")
);

Output

true

Using Array.from() and Array.prototype.join() Methods

In this approach, we are using the from() and join() methods in JavaScript. Here, we are converting the input strings into an array of characters, then comparing these characters using the (===) operator, and then joining them back to strings. If the strings are the same, then the output is true; otherwise, it is false.

Syntax:

Array.from(str1).join('') === Array.from(str2).join('') 

Example: This example shows the use of the above-explained approach.

Javascript

const sameString = (
    inputString1,
    inputString2 ) => {
    return (
        Array.from(inputString1).join(
            "") ===
        Array.from(inputString2).join(
            "")
);};
console.log(
    sameString("geeks", "geeks")
);

Output

true