View file File name : class-excluded-post-types-control.js Content :/* eslint-disable no-var */ jQuery( document ).ready( function ( $ ) { // Refresh our hidden field value if any checkboxes change $( '.customize-control-excluded-post-type-checkbox' ).on( 'change', function () { var $parent = $( this ).parent().parent(); var newValue = $parent .find( '.customize-control-excluded-post-type-checkbox:checked' ) .map( function () { return $( this ).val(); } ) .toArray(); $parent.find( '.customize-control-excluded-post-types' ).val( newValue ).trigger( 'change' ); // Set the last unchecked checkbox disabled to prvevent user from excluding all post types var excludedPostTypesCount = $parent.find( '.customize-control-excluded-post-type-checkbox:not(:checked)' ).length; $parent .find( '.customize-control-excluded-post-type-checkbox:not(:checked)' ) .prop( 'disabled', excludedPostTypesCount <= 1 ); } ); } );