w3resource

JavaScript: Check whether a given value is html or not

JavaScript validation with regular expression: Exercise-19 with Solution

Write a JavaScript function to check whether a given value is HTML or not.

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Write a JavaScript function to check whether a given value is html or not.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function is_html(str)
{
 regexp = /<([a-z]+) *[^/]*?>/;
  
        if (regexp.test(str))
          {
            return true;
          }
        else
          {
            return false;
          }
}

console.log(is_html(''));

console.log(is_html(''));

console.log(is_html('.selector'));

Sample Output:

false
false
false

Flowchart:

Flowchart: JavaScript- Check whether a given value is html or not

Live Demo:

See the Pen javascript-regexp-exercise-19 by w3resource (@w3resource) on CodePen.


Improve this sample solution and post your code through Disqus

Previous: Write a JavaScript function to check whether a given value represents a domain or not.
Next:Write a JavaScript function to check a given value contains alpha, dash and underscore.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Follow us on Facebook and Twitter for latest update.