Theme customizer – possible to disable Live Preview?

Question

Yes, there is a way to disable the Live Preview rendering.

1] Open your theme’s functions.php file.

2] Append the following code snippet at the very end of the file:

add_action( 'customize_preview_init', function() {
die("The customizer is disabled. Please save and preview your site on the frontend.");
}, 1);

3] Save your functions.php file.

That’s it. I’ve tested it and it works without issue.