Popper.js 不会加载 [英] Popper.js won't load

问题描述

我正在使用 Bootstrap，我希望使用下拉菜单.当我点击它时它不起作用，控制台中出现以下消息:

I am using Bootstrap and I wish to use a dropdown menu. When I click it it does not work and the following message appears in console:

Uncaught TypeError: Bootstrap dropdown require Popper.js (https://popper.js.org)

我用谷歌搜索并找到了一种安装 popper 的方法，但是当我尝试运行安装命令时:

I googled and found a way to install popper, but when I try to run the install command:

PM> Install-Package popper.js

visual studio 包管理器显示以下消息:

The visual studio package manager shows the following message:

Package 'popper.js.1.12.9' already exists in project '<ProjectName>'

有人知道这里发生了什么吗?

Does anyone know what's going on here?

推荐答案

这一定是您所说的针对您的问题的原因.包含脚本文件的顺序应该是这样的:

This must be the reason looking to your problem you are saying . The order of including script file should be like this :

1> jquery

2> popper js

2> popper js

3> Bootstrap js

3> Bootstrap js

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js" integrity="sha384-b/U6ypiBEHpOf/4+1nzFpr53nxSS+GLCkfwBdFNTxtclqqenISfwAzpKaMNFNmj4" crossorigin="anonymous"></script>

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js" integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1" crossorigin="anonymous"></script>

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