This repository can be found on drupal.org here: https://www.drupal.org/project/obfuscate_email
This module protects email addresses from spam bots, in two ways:
- A field template
- a text filter for ckeditor output.
Both situation utilize the same javascript.
To hide your emails from bots, render a non readable email on the server and decrypt it via vanilla JS in the client. No jQuery needed. The basic idea consists of three parts:
- hide behind a data-attribute
- substitute the @-sign and dots (.) with
/at/,/dot/, then - shift everything via rot13
- rebuild it via javascript
Notice: There is no non-javascript fallback to this method!
Have a look into template/field--email.html.twig to have a fully working
example. This template will be used when the module is enabled. Use the
drupal suggestion system to override this default template. The JS is attached
to the page.
<a data-mail-to="znvy/ng/znvy/qbg/pbz">Email</a>
<a data-mail-to="znvy/ng/znvy/qbg/pbz" data-replace-inner="">Email</a>
<span data-mail-to="znvy/ng/znvy/qbg/pbz" data-replace-inner="@mail">drop me a line at @mail</span>
will be converted to
<a href="mailto:mail@mail.com">Email</a>
<a href="mailto:mail@mail.com">mail@mail.com</a>
<span>drop me a line at mail@mail.com</span>
Note: Use the data-replace-inner attribute to replace the complete inner text,
or give it a string to only replace this very string.
In the backend go to admin/config/content/formats, e.g. Basic HTML, and under
the section "Enabled filters" check the box "Obfuscate Email". So now every
mailto-anchor written in the ckeditor will be preprocessed before rendering and
substituted on the client side.