Visual editor popover or placeholder

Question

I am using the tinyMCE visual editor to allow users of my site to submit some content.

I would like to layout the guidelines of their post to them (eg: "Be specific, be thorough"). The most obvious way to do this is ordinarily with the placeholder attribute.

However, I understand this is not an option with the visual editor.

Therefore, I though of showing a bootstrap popover on focus of the visual editor. However, I am not able to achieve this either (perhaps because the visual editor iframe uses elements that don't trigger focus).

Is there a way that I can do either of the above two things?

If not, how can I present the user with some guidelines for writing the post? (I feel like if I don't place the guidelines within the editor or as a response to focusing on the editor, it will receive less attention).

Thanks.

Answer 1

If you use the build-in tinyMCE editor you can do it this way:

$content = '';
$editor_id = 'mycustomeditor';

wp_editor( $content, $editor_id );

Fill $content with your guidelines and they are shown if you open it.

See https://codex.wordpress.org/Function_Reference/wp_editor