Using a conditional statement to validate a data entry form in MS Access

I have a web document, https://example.com/page.html, where a javascript, like <script src='https://example.com/script.js'> loads a

and into this div the same script loads content from a JSON file loaded by the script with XHR. Now the text in the div is indexed by Google.

If I add to both of script and JSON file Header set X-Robots-Tag 'noindex,nofollow', would I prevent the indexation of the text in div on page.html or not?