JavaScript: Check whether a given value is html or not

JavaScript validation with regular expression: Exercise-19 with Solution

Validate HTML Content

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

Sample Solution:

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'));

Output:

false
false
false

Flowchart:

Live Demo:

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

For more Practice: Solve these Related Problems:

• Write a JavaScript function that checks if a given string contains valid HTML tags using a regular expression.
• Write a JavaScript function that strips out HTML tags and compares the cleaned content with the original string.
• Write a JavaScript function that validates whether a string is likely to be HTML by checking for a mix of tags and content.
• Write a JavaScript function that returns true if the string starts and ends with matching HTML tags.

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