Introduction to endsWith() in JavaScript
In JavaScript, endsWith() is a String method, which is used to determines whether a string ends with the characters of a specified string or not. This method returns Boolean Value i.e. true or false. It returns true if the string ends with the given characters or substring, otherwise false. This method is case sensitive.
In JavaScript, the syntax for endsWith() method is:
string.endsWith(substringvalue, length);OR
string.endsWith(substringvalue);Here, the endsWith() method accepts two Attributes or Parameters.
Parameters:
- string: This is a string Object.
- substringvalue: It is the set of characters to search for at the end of the given string. This is a mandatory attribute. It can be a single character or multiple characters or multiple words.
- length: You can specify the length of the string you want it to search. This is an optional attribute. If the length attribute value is set, then it searches the string up to given length value, otherwise, the method considers as default string length value. For example, if the length attribute value set to 6. This means that only the first six characters of the string will be searched or tested.
Examples of endsWith() in JavaScript
Below are the examples of endsWith() in JavaScript:
Example #1 – Without Length Attribute
Code:
<!DOCTYPE html>
<html>
<body>
<script>
var str = "EDUCBA JavaScript Article";
var n = str. endsWith("Article");
document. write(n);
</script>
</body>
</html>Output:
In the above example, we have used the endsWith() method to check if the given string ends with the substringvalue “Article” or not. Therefore the method returns true.
Example #2 – With Length Attribute
Code:
<!DOCTYPE html>
<html>
<body>
<script>
var str = "EDUCBA JavaScript Article";
var n = str. endsWith("Java",11);
document. write(n);
</script>
</body>
</html>Output:
In the above example the value of length parameter set to 11 i.e. it checks the first 11 characters in the given string. So if the substringvalue “Java” is found at the end of a given length of the string or not. Therefore the method returns true.
Example #3 – Case-Sensitive
Code:
<!DOCTYPE html>
<html>
<body>
<script>
var str = "EDUCBA JavaScript Article";
var n = str. endsWith("article");
document. write(n);
</script>
</body>
</html>Output:
In the above example, it provides False output, Because the endsWith() method perform a Case-sensitive searching, the substringvalue “Article” is found at the end of the given string” EDUCBA JavaScript Article “but “article” is not found. Therefore the method returns false.
Example #4 – Result on Browser Console
Code:
var str = "EDUCBA JavaScript Article";
console.log(str.endsWith("Article"));
console.log(str.endsWith("Java",11));
console.log(str.endsWith("article"));Output:
In the above example, we use the console class with the log method. By using this class we executed the given method and show all the results on Browser Console. The endsWith() method to test if the given string ends with the substringvalue “Article” or not. Therefore the method returns True.
The value of length attribute set to 11 i.e. it checks first 11characters in the given string. So if the substringvalue “Java” is found at the end of a given length of the string or not. Therefore the method returns True. As the endsWith() method performs Case-sensitive testing, the substringvalue “Article” is found at the end of the given string” EDUCBA JavaScript Article ” but “article” is not found. Therefore the method returns False.
Example #5 – Single Character
Code:
var str = "EDUCBA JavaScript Article";
console.log(str.endsWith("e"));
console.log(str.endsWith("e"));
console.log(str.endsWith("f"));Output:
In the above example, we have used the endsWith() method to check if the given string ends with the substringvalue of a single character or not. Therefore the method returns true in first & second case and false in the third case.
Example #6 – Multiple Characters
Code:
var str = "EDUCBA JavaScript Article";
console.log(str.endsWith("cle"));
console.log(str.endsWith("cee"));Output:
In the above example, we have used the endsWith( ) method to check if the given string ends with the substringvalue of multiple words or not. Therefore the method returns true in the first case and false in the second case.
Conclusion
In this article we especially discussed on JavaScript string ends with the () method, which tests the substringvalue with the end of the given string & returns Boolean value i.e. true or false. Similarly, you can verify JavaScript string startsWith( ) method, which tests or verify the substringvalue with the start of the given string and returns a Boolean value. So, there are so many methods which are related to String like, startsWith( ), replace( ), replace( ),substr( ),etc.
