JavaScript: Check whether a given value is html or not

Last update on April 24 2023 12:58:47 (UTC/GMT +8 hours)

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:

Live Demo:

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

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