[object Object]是什么意思？ [英] what does [object Object] mean?

问题描述

我正在尝试提醒函数返回的值，我在警告中得到此信息

I am trying to alert a returned value from a function and i get this in the alert

[object Object]

[object Object]

这里是javascript代码

here is the javascript code

<script type="text/javascript">
$(function ()
{
var $main = $('#main'),
    $1 = $('#1'),
    $2 = $('#2');

$2.hide(); // hide div#2 when the page is loaded

$main.click(function ()
{
    $1.toggle();
    $2.toggle();
});

 $('#senddvd').click(function ()
{
   alert('hello');
   var a=whichIsVisible();
   alert(whichIsVisible());
});


function whichIsVisible()
{
    if (!$1.is(':hidden')) return $1;
    if (!$2.is(':hidden')) return $2;
}

 });

 </script>

whichIsVisible是我试图检查的功能

whichIsVisible is the function which i am trying to check on

推荐答案

从对象到字符串的默认转换是[object Object]。

The default conversion from an object to string is "[object Object]".

当您处理jQuery对象时，您可能想要

As you are dealing with jQuery objects, you might want to do

alert(whichIsVisible()[0].id);

打印元素的ID。

正如评论中所提到的，您应该使用Firefox或Chrome等浏览器中的工具来通过 console.log（whichIsVisible（））而不是<$ c $来内省对象。 c> alert 。

As mentioned in the comments, you should the use tools included in browsers like Firefox or Chrome to introspect objects by doing console.log(whichIsVisible()) instead of alert.

Sidenote ：ID不应以数字开头。

Sidenote: IDs should not start with digits.

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