Obfuscate Email

Protect email addresses from spam bots, in two situations:

1. In a field template, or
2. in a text filter for ckeditor output

Both situation utilize the same javascript.

Upgrading to 2.1.x

Ensure you have uninstalled the rot13 submodule prior to upgrading as it is no longer required. See Release Notes

How it works?

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!

How to use the template

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.

How to use the text filter

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.

Source

GitHub: https://www.github.com/WondrousLLC/obfuscate_email

Thanks

Thanks to b_sharpe for adding the text filter.