javascript - bootstrap.min.js :6 Uncaught Error: Bootstrap dropdown require Popper. js

Question

当我尝试打开下拉菜单时突然开始出错:

 bootstrap.min.js:6 Uncaught Error: Bootstrap dropdown require Popper.js (https://popper.js.org)
        at bootstrap.min.js:6
        at bootstrap.min.js:6
        at bootstrap.min.js:6

我正在使用标准 Bootstrap 文件

<script src="https://getbootstrap.com/dist/js/bootstrap.min.js">

bootstrap 中有什么我需要注意的变化吗？

我加载文件的顺序如下

<script src="https://code.jquery.com/jquery-1.9.1.js"></script>
<script src="{{ STATIC_URL }}/static/jquery/jquery-1.9.1.js"></script>
<script src="https://code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<script src="{{ STATIC_URL }}/static/jquery/jquery-ui.js"></script>




<script src="https://getbootstrap.com/dist/js/bootstrap.min.js"></script>
<!-- Just to make our placeholder images work. Don't actually copy the next line! -->
<script src="https://getbootstrap.com/assets/js/vendor/holder.min.js"></script>
<!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
<script src="https://getbootstrap.com/assets/js/ie10-viewport-bug-workaround.js"></script>

Answer 1

在 Bootstrap 的介绍中，它说明了您需要添加哪些导入。 https://getbootstrap.com/docs/4.0/getting-started/introduction/#quick-start

您必须添加一些脚本才能使 Bootstrap 完全运行。请务必按此确切顺序包括它们。 Popper.js 就是其中之一:

    <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>