javascript - "Object object"在 Javascript 中不再可用

Question

我得到的输出看起来像这样

“对象对象不再可用，已从分配#257中删除”

使用以下代码

if(typeof find_staff.staff != 'undefined') {
    var staff = find_staff.staff;
    staff = $.extend({}, staff.preferences, staff.staff); 

    if(typeof(staff[staff_id]) != 'undefined') {
        loop_continue = true;
    }
    else {
        $('#' + i).html('<p>' + staff + ' is no longer available and has been removed from assignment #' + booking_id + '</p>');

        // Break from loop
        loop_continue = false; 
    }
}
else {
    $('#' + i).html('<p>' + staff + ' is no longer available and has been removed from #' + v.booking_id + '</p>');

    // Break from loop
    loop_continue = false; 
}

Answer 1

很明显 staff是一个对象，因为这就是 $.extend 返回的内容

var staff = find_staff.staff;
staff = $.extend({}, staff.preferences, staff.staff); 

恰好一个对象的字符串表示是 [Object, object] .
这样做'<p>' + staff + ' is no lo...将对象与字符串连接起来，有效地执行 staff.toString()这给你 [Object, object]