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wp_attach_theme_preview_middleware › WordPress Function

Since6.3.0
Deprecatedn/a
› wp_attach_theme_preview_middleware ( No parameters )
Defined at:
Codex:

Adds a middleware to `apiFetch` to set the theme for the preview.

This adds a wp_theme_preview URL parameter to API requests from the Site Editor, so they also respond as if the theme is set to the value of the parameter.


Related Functions: wp_get_theme_preview_path, wp_attachment_is_image, wp_initialize_theme_preview_hooks, wp_robots_max_image_preview_large, wp_edit_theme_plugin_file

Source 

function wp_attach_theme_preview_middleware() {
	// Don't allow non-admins to preview themes.
	if ( ! current_user_can( 'switch_themes' ) ) {
		return;
	}

	wp_add_inline_script(
		'wp-api-fetch',
		sprintf(
			'wp.apiFetch.use( wp.apiFetch.createThemePreviewMiddleware( %s ) );',
			wp_json_encode( sanitize_text_field( wp_unslash( $_GET['wp_theme_preview'] ) ) )
		),
		'after'
	);
}