TypeError:无法读取 null 的属性“单击" [英] TypeError: Cannot read property 'click' of null

问题描述

我一直在使用这些代码在 Twitter 上大量关注/取消关注/收藏/取消收藏；

I have been mass following / unfollowing / favoriting / unfavoriting on twitter with these codes ;

$('button.follow-button').click();
$('button.ProfileTweet-actionButtonUndo').click();
$('a.favorite').click();

我在网上找到了一些不工作的代码并尝试修复，所以它们现在几乎可以工作了.唯一的事情就是去谷歌浏览器上的页面，按 f12 ，打开控制台并运行命令.

I found some not-working codes online and tried to fix, so they are nearly working now. The only thing is to go to the page on google chrome, press f12 , open console and run the command.

所以现在，我想在 Vine 中使用相同的系统.谷歌浏览器有一个扩展来使用 vine ( https://client.vineclient.com/ ) 和我正在尝试使用它，因为原始网页( vine.co )甚至没有用.

So now, I wanted to use the same system in Vine. There"s an extension for google chrome to use vine ( https://client.vineclient.com/ ) and I am trying to use it because original webpage ( vine.co ) is not even useful.

twitter 和this 的唯一区别是，在 vine 客户端的 ^followers^ 部分中，页面中会出现一个弹出窗口.而且我不知道它是否检测到按钮.

The only difference between twitter and this, is that, in vine client for ^followers^ section, an pop-up comes in the page. And I don!t know if it detects the buttons.

所以，我试图从原始页面点击的按钮的代码，(我使用开发人员工具/元素获取它)

So , the code of the button I am trying to click from original page , ( I took it using developer tools / elements )

<div class="user">
<img alt="Tuğçe Nur TEKİN" class="avatar" src="http://v.cdn.vine.co/r/avatars/3C2E4F40F11066473630650847232_pic-r-1397241239141e51579937f.jpg.jpg?versionId=ttIz4CExCjW_4TEnxYbnehPPpXRyzMco">
<div class="wrapper">
<a class="username" 
href="https://client.vineclient.com/explore/users/1066473613911363584">
Tuğçe Nur TEKİN
</a>
</div>
<a class="button follow" data-id="1066473613911363584">
<i class="icon">
</i>
</a>
</div>

要点击的东西在这里:

当我手动点击时，它会变成这样:

When I manually click, it changes into this :

<a class="button unfollow" data-id="1066473613911363584"><i class="icon"></i></a>

以及我用来尝试点击的命令

And the command I use to try to click

$(".a.follow").click();

我得到的错误，

TypeError: Cannot read property 'click' of null

我该如何解决这个问题?顺便说一句，在这些代码中，我实际上找不到任何 ^button^ 代码..谢谢！

How can I fix that? By the way, in these codes, I couldn"t find actually any ^button^ codes.. Thanks!

更新

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推荐答案

我遇到了这个问题，当我从其他地方(例如 Selenium)在网页上运行 javascript 同时使用开发者工具时.尝试关闭开发者工具并运行脚本.

I had encountered this problem, when I run javascript on the webpage from elsewhere (eg. Selenium) while simultaneously using Developer Tools. Try closing Developer Tools and run the script.

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