How to make Rank Math table of contents collapsible?

Hello,

Thank you for contacting us and bringing your concern to our attention.

I’m sorry to inform you that, by default, there is no option available for that but if you want you can use the following customize CSS on your site to make your ToC collapsable:

#rank-math-toc{
	position:relative;
}

#rank-math-toc h2 {
    background: #f1f2f6;
    padding: 10px 12px 10px 18px;
    cursor: pointer;
    font-size: 18px !important;
    font-weight: normal !important;
    position:relative;
    margin-bottom: 0;
}
#rank-math-toc h2:before {
	display:inline-block;
	content: "";
    width: 0;
	height: 0;
	border-style: solid;
	border-width: 6px 0 6px 12px;
	border-color: transparent transparent transparent #000000;
	margin-right: 8px;
}

#rank-math-toc nav{
	padding: 10px 10px 0px 10px;
	max-height: 0;
	overflow:hidden;
}
#rank-math-toc input:checked+h2~nav {
	max-height: 100vh;
	overflow:visible;
}

Here’s a guide you can follow to add this custom CSS on your site:
https://www.wpbeginner.com/plugins/how-to-easily-add-custom-css-to-your-wordpress-site/

Once done, add this filter to your site: https://pastebin.com/jLTDeAWw

Here is how to add a filter to your site:
https://rankmath.com/kb/wordpress-hooks-actions-filters/

This should make the TOC collapsable

Let us know how it goes. Looking forward to helping you.

Thank you.

Hello,

Can you please confirm if you’ve applied the filter code I’ve shared above?

After applying the custom CSS, please add this filter to your website to make your Table of Contents collapsable: https://pastebin.com/jLTDeAWw

Here is how you can add this filter to your website:
https://rankmath.com/kb/wordpress-hooks-actions-filters/

Let us know how it goes. Looking forward to helping you.

Thank you.

Hello,

Please try to add <?php at the beginning of your rank-math.php file.

If the issue still persists, then we might need to take a closer look at the settings. Please edit the first post on this ticket and include your WordPress & FTP logins in the designated Sensitive Data section.

Please do take a complete backup of your website before sharing the information with us.

It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead:

https://wordpress.org/plugins/temporary-login-without-password/

You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):

https://wordpress.org/plugins/wp-security-audit-log/

Looking forward to helping you.

Thank you.