tinymce-docs/_includes/configuration/allow_html_in_named_anchor.md

allow_html_in_named_anchor

This option allows you to specify whether the editor should parse and keep html within named anchor tags.

Type: Boolean

Default Value: false

Possible Values: true, false

Example: Using allow_html_in_named_anchor

tinymce.init({
  selector: 'textarea',  // change this value according to your HTML
  allow_html_in_named_anchor: true
});