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JavaScript: Check if a string ends with specified suffix

JavaScript String: Exercise-30 with Solution

Write a JavaScript function check if a string ends with specified suffix.

Test Data :
console.log(string_endsWith('JS PHP PYTHON','PYTHON'));
true
console.log(string_endsWith('JS PHP PYTHON',''));
false

Pictorial Presentation:

JavaScript: Check if a string ends with specified suffix

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function check if a string ends with specified suffix</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function string_endsWith(str, suffix) 
{
 
 if (((str===null) || (str==='')) || ((suffix===null) || (suffix==='')))
   {
    return false;
   }
  else
  {     
   str = str.toString();
   suffix = suffix.toString();
   }
 return str.indexOf(suffix, str.length -     suffix.length) !== -1;
}

console.log(string_endsWith('JS PHP PYTHON','PYTHON'));

console.log(string_endsWith('JS PHP PYTHON',''));

Sample Output:

true
false

Flowchart:

Flowchart: JavaScript- Check if a string ends with  specified suffix

Live Demo:

See the Pen JavaScript Check if a string ends with specified suffix - string-ex-30 by w3resource (@w3resource) on CodePen.


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Next: Write a JavaScript function to escapes special characters (&, <, >, ', ") for use in HTML.

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JavaScript: Tips of the Day

How to check whether a string contains a substring in JavaScript?

ECMAScript 6 introduced String.prototype.includes:

const string = "foo";
const substring = "oo";

console.log(string.includes(substring));

includes doesn't have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found:

var string = "foo";
var substring = "oo";

console.log(string.indexOf(substring) !== -1);

Ref: https://bit.ly/3fFFgZv