尽管在静态目录中有它，但无法将 javascript 应用于我在烧瓶中的模板.如何在下面的代码中解决这个问题?
我有一个烧瓶项目，我正在尝试制作 tree 结构，但我不认为 JS 被应用于我的 tree.html它无法扩展选项.以下是我在互联网上找到的代码，由于我没有任何前端经验，因此我正在尝试使其工作.非常感谢您的帮助.
I have a flask project in which I'm trying to make a tree structure but I don't think the JS is being applied to my tree.html as it couldn't expand the options. Below is the code that I found in internet which I'm trying to make work as I don't have any frontend experience. I'd be grateful for your help.
Base.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>{% block title %}{% endblock %}</title>
<script type="text/javascript" src="/static/jsfun.js"></script>
</head>
<body>
{% block content %}
{% endblock %}
</body>
</html>
tree.html
{% extends "base.html" %}
{% block content %}
<ul class="tree">
<li><a href="#">Part 1</a>
<ul>
<li><a href="#">Item A</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
<li><a href="#">Item B</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
<li><a href="#">Item C</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
<li><a href="#">Item D</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
<li><a href="#">Item E</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#">Part 2</a>
<ul>
<li><a href="#">Item A</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
<li><a href="#">Item B</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
<li><a href="#">Item C</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
<li><a href="#">Item D</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
<li><a href="#">Item E</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#">Part 3</a>
<ul>
<li><a href="#">Item A</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
<li><a href="#">Item B</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
<li><a href="#">Item C</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
<li><a href="#">Item D</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
<li><a href="#">Item E</a>
<ul>
<li><a href="#">Sub-item 1</a></li>
<li><a href="#">Sub-item 2</a></li>
<li><a href="#">Sub-item 3</a></li>
</ul>
</li>
</ul>
</li>
</ul>
{% endblock %}
jsfun.js
var tree = document.querySelectorAll('ul.tree a:not(:last-child)');
for(var i = 0; i < tree.length; i++){
tree[i].addEventListener('click', function(e) {
var parent = e.target.parentElement;
var classList = parent.classList;
if(classList.contains("open")) {
classList.remove('open');
var opensubs = parent.querySelectorAll(':scope .open');
for(var i = 0; i < opensubs.length; i++){
opensubs[i].classList.remove('open');
}
} else {
classList.add('open');
}
});
}
这是页面打开的时间
当我点击任何项目时，什么都没有发生:
And nothing happens when I click any item:
推荐答案
请查看 this repo.检查你在哪里犯了错误.我相信它是您导入 js 文件的方式.你应该像下面这样使用
Please check this repo. Check where you are making a mistake. I believe its the way you are importing the js file. you should use like below
<script src="{{ url_for('static', filename='js/jsfun.js') }}"></script>
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