How to check if a string ends with another string or character in JavaScript

JavaScript endsWith method, check if string ends with another string or character:

In this post, we will learn how to use endsWith method of JavaScript string. This method can be used to check if a string ends with a character or another substring or not.

It returns one boolean value based on the check.

Let’s learn the definition of this method first.

Definition of endsWith:

The endsWith method is defined as like below:

endsWith(str, l)

Here,

The first parameter is the string that we are searching in the string. We can pass a single character or characters/string. These characters will be searched at the end of the string.
The second parameter is the length of the string. It is an optional value. If we don’t provide this value, the string length is used here.

Return value of endsWith:

It returns a boolean value. It returns true if the characters are found in the end of the string. Else, it returns false.

Example of endsWith with characters:

Let’s take an example of endsWith with characters:

const givenStr = "Hello World";

console.log(givenStr.endsWith("d"));
console.log(givenStr.endsWith("a"));
console.log(givenStr.endsWith(""));

It is trying endsWith with the string givenStr with three different characters: ‘d’, ‘a’, ”. If you run this program, it will print true for ‘d’ and for the empty string.

true
false
true

Example of endsWith method with string:

Let’s try it with strings:

const givenStr = "Hello World";

console.log(givenStr.endsWith("rld"));
console.log(givenStr.endsWith("World"));
console.log(givenStr.endsWith(" World"));

It will print true for all of these three because all of these three words are at the end of givenStr.

Example of endsWith method with both parameters:

Let’s try endsWith method with both parameter values:

const givenStr = "Hello World";

console.log(givenStr.endsWith("World", 20));
console.log(givenStr.endsWith("World", 6));
console.log(givenStr.endsWith("llo ", 6));
console.log(givenStr.endsWith("World", 11));

For the first one, it will find the word from the end of the string because 20 is greater than the string length.
For the second one, it will find the word from end starting from the index 5 of the string.
For the third one, it will find the word from the end starting from the index 5 of the string.
For the last one, it will find the word from the end starting from the index 10.

It will print:

true
false
true
true

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