Dynamically created setting not received on previewer

[jegbagus]

I try to create dynamic setting & control on customizer, but setting is not propagated on previewer when setting created. Setting that dynamically created will only available on previewer when previewer refreshed.

i create a simple plugin to explain this issue : ​https://gist.github.com/jegbagus/e6bfe04fe45f4fa91b1fdc1c3b5b7a89

please take a look at browser console to see the message

[westonruter]

Hi. You just have to send the setting to the preview after you create it. For example, ​in the controls app:

setting.previewer.send( 'setting', [ setting.id, setting() ] );

It will then get created as a dirty setting in the preview here: ​https://github.com/WordPress/wordpress-develop/blob/0cc1c1104998bc4c0e4a4a484e6467f6b1fa0c6b/src/wp-includes/js/customize-preview.js#L695-L735

[dlh]

Based on comment:1, there isn't a code bug here, but there's still an opportunity to document this potential gotcha.

@jegbagus Can you think back to when you submitted this ticket to suggest a location in the codebase or the ​Customizer handbook where it would have been helpful to see the snippet in comment:1?