您可以只检查customize对象，但如果您确实需要一个条件语句来确定您需要的内容，则可以执行以下操作：

jQuery( function( $ ) {

    // set var
    var in_customizer = false;

    // check for wp.customize return boolean
    if ( typeof wp !== \'undefined\' ) {
        in_customizer =  typeof wp.customize !== \'undefined\' ? true : false;
    }

    // if you\'re in the customizer do this
    if ( in_customizer ) {
        console.log(\'in customizer\');

    // if you\'re not in the customizer do this
    } else {
        console.log(\'not in customizer\');
    }

});