JavaScript String.endsWith() Method

1. Syntax of JavaScript string.endsWith():
2. Example Codes: Find Multiple Characters at the End of a String Using the string.endsWith() Method
3. Example Codes: Search if String Ends With a Single Character Using the string.endsWith() Method
4. Example Codes: Search Substring of a String With the len Parameter of JavaScript string.endsWith() Method

The JavaScript string.endsWith() method produces a Boolean object that indicates if the provided character(s) are at the end of the original string or not without changing the original string.

Syntax of JavaScript string.endsWith():

this_string.endsWith(characters);
this_string.endsWith(characters, len);

Parameters

Return

If the string parameter characters is located at the end of the string, the endsWith() function returns true. It returns false otherwise.

Example Codes: Find Multiple Characters at the End of a String Using the string.endsWith() Method

Suppose we want to find a word at the end of the sentence.

In this example, endsWith() searches for the term Humans at the end of this_string. It prints the result on the console.

const this_string = "We all are Humans";
let characters="Humans";

console.log(this_string.endsWith(characters))

characters="humans"
console.log(this_string.endsWith(characters))

Output:

true
false

We can see that when we replace the Humans string in the characters parameter with humans, the endsWith() function returns a Boolean of value false.

This demonstrates the case sensitivity of the JavaScript string endsWith() method.

Example Codes: Search if String Ends With a Single Character Using the string.endsWith() Method

In this example, it is determined whether a given sentence is a question or not.

let sentence = "What's your name?";

let is_question = sentence.endsWith("?");

console.log(is_question)

When the string sentencecalls the endsWith() method with ? as the only parameter, endsWith() searches from left to right for ? till the length of the sentence string.

Output:

true

Example Codes: Search Substring of a String With the len Parameter of JavaScript string.endsWith() Method

This example will search for the word all till the specified length of characters in the this_string.

Setting the len parameter in the JavaScript string endsWith() method causes it to search for the provided word within the given length passed in the len parameter.

const this_string = "We all are Humans";
const characters="all";
let len=6;

console.log(this_string.endsWith(characters));
console.log(this_string.endsWith(characters,len));

Output:

false
true

When passing characters parameters as all with the len parameter not set, its value is the full length of the this_string calling object; therefore, the string endsWith() method returns false.

The JavaScript string endsWith() method returns a boolean having a value of true as the string all in the characters parameter is located at the end of the first 6 characters of this_string string object.