问题描述
我想制作嵌套列表，使其类似于树文件夹结构
这是我对我的清单的期待
这是我尝试过但不起作用的方法
<link href="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.css" rel="stylesheet">
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
<script src="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.js"></script>
<ul class="mdc-list" style="margin-left: 17px;padding: 0;margin-top: -7px;">
<li class="mdc-list-item" tabindex="0">
<span class="material-icons"> arrow_right </span>
<span class="mdc-list-item__ripple"></span><span class="material-icons folder-base-color"> folder </span>
<span class="mdc-list-item__text">json-dumps</span>
</li>
<li class="mdc-list-item" tabindex="0">
<span class="material-icons"> arrow_right </span>
<span class="mdc-list-item__ripple"></span><span class="material-icons folder-base-color"> folder </span>
<span class="mdc-list-item__text">test</span>
<ul class="mdc-list" style="margin-left: 17px;padding: 0;margin-top: -7px;">
<li class="mdc-list-item" tabindex="0">
<span class="material-icons"> arrow_right </span>
<span class="mdc-list-item__ripple"></span><span class="material-icons folder-base-color"> folder </span>
<span class="mdc-list-item__text">nested test</span>
</li>
<li class="mdc-list-item" tabindex="0">
<span class="material-icons"> arrow_right </span>
<span class="mdc-list-item__ripple"></span><span class="material-icons folder-base-color"> folder </span>
<span class="mdc-list-item__text">nested test 2</span>
</li>
</ul>
</li>
</ul>解决方法
编辑：我已更新代码沙箱链接以使用 ul 和 li
看看这是否适合您https://codesandbox.io/s/stupefied-swirles-219nc?file=/index.html
正如您所要求的，它在没有 JS 的情况下也为您提供了功能。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width,initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Static Template</title>
<style>
.app-nested-nav__section-content {
margin-left: 2em;
}
</style>
</head>
<body>
<link
href="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.css"
rel="stylesheet"
/>
<link
rel="stylesheet"
href="https://fonts.googleapis.com/icon?family=Material+Icons"
/>
<script src="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.js"></script>
<details class="app-nested-nav__section" open>
<summary class="app-nested-nav__section-header mdc-list-item">
<span class="mdc-list-item__ripple"></span
><span class="material-icons folder-base-color"> folder </span>
<span class="mdc-list-item__text">json-dumps</span></summary
>
<details class="app-nested-nav__section-content">
<summary class="app-nested-nav__section-header mdc-list-item">
<span class="mdc-list-item__ripple"></span
><span class="material-icons folder-base-color"> folder </span>
<span class="mdc-list-item__text">json-dumps</span></summary
>
<div class="app-nested-nav__section-content">
<summary class="app-nested-nav__section-header mdc-list-item">
<span class="mdc-list-item__ripple"></span
><span class="material-icons folder-base-color"> folder </span>
<span class="mdc-list-item__text">json-dumps</span></summary
>
<summary class="app-nested-nav__section-header mdc-list-item">
<span class="mdc-list-item__ripple"></span
><span class="material-icons folder-base-color"> folder </span>
<span class="mdc-list-item__text">json-dumps</span></summary
>
<summary class="app-nested-nav__section-header mdc-list-item">
<span class="mdc-list-item__ripple"></span
><span class="material-icons folder-base-color"> folder </span>
<span class="mdc-list-item__text">json-dumps</span></summary
>
</div>
</details>
<summary class="app-nested-nav__section-content mdc-list-item">
<span class="mdc-list-item__ripple"></span
><span class="material-icons folder-base-color"> folder </span>
<span class="mdc-list-item__text">json-dumps</span></summary
>
</details>
</body>
</html>灵感来自https://codepen.io/rustemgareev/pen/GOBado
,您可以尝试以下示例。所有元素都是基于 JSON 中提供的元素、递归函数 buildTree 和 <template> 元素创建的。 JSON 的架构非常简单（title,iconClass,children）。我想你会发现它很简单。
const buildTree = (tree,ancestor = null) => {
let ulMDCList = document.querySelector('.mdc-list');
tree.forEach((item,index) => {
let liTemplate = document.getElementById('list-item').content.cloneNode(true);
let liMDCItem = liTemplate.querySelector('.mdc-list-item');
if(ancestor !== null) {
liMDCItem.dataset.childOf = ancestor.id;
liMDCItem.classList.add('child','hidden');
liMDCItem.id = ancestor.id + liMDCItem.dataset.id + index;
liMDCItem.dataset.z = parseInt(ancestor.dataset.z) + 1;
} else {
liMDCItem.id = liMDCItem.dataset.id + index;
liMDCItem.dataset.z = 0;
}
let arrow = liTemplate.querySelector('span[data-id="arrow"]');
let icon = liTemplate.querySelector('span[data-id="icon"]');
let title = liTemplate.querySelector('span[data-id="title"]');
if(item.iconClass.length > 0) {
icon.innerHTML = item.iconClass;
}
title.innerHTML = item.title;
ulMDCList.append(liTemplate);
if(hasChildren(item.children)) {
buildTree(item.children,liMDCItem);
liMDCItem.addEventListener('click',(e) => {
if(arrow.innerHTML == 'arrow_drop_down') {
arrow.innerHTML = 'arrow_right';
} else {
arrow.innerHTML = 'arrow_drop_down';
}
ulMDCList.querySelectorAll(`[data-child-of=\"${liMDCItem.id}\"]`).forEach((item) => { item.classList.toggle('hidden') });
});
} else {
arrow.innerHTML = '';
}
});
}
const hasChildren = (children) => {
return (typeof children !== 'undefined' && Array.isArray(children) && children.length > 0);
}
const menuData = '[{"title": "json","iconClass": "folder","children": [{"title": "1st-child","children": [{"title": "Another image","iconClass": "image","children": []},{"title": "Another folder","children": [{"title": "And another image","children": []}]}]},{"title": "My image","children": []}]},{"title": "A solo image","children": []}]';
mdc.autoInit();
buildTree(JSON.parse(menuData));.mdc-list-item.hidden {
display: none;
}
[data-z="1"] {
margin-left: 5%;
}
[data-z="2"] {
margin-left: 10%;
}
[data-z="3"] {
margin-left: 15%;
}
[data-id="icon"] {
padding-right: 0.5rem;
width: 1.25rem;
}
[data-id="arrow"] {
width: 1.25rem;
}
.material-icons.image {
content: 'image';
}<link href="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.css" rel="stylesheet"/>
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
<script src="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.js"></script>
<ul class="mdc-list" aria-role="list" aria-orientation="vertical">
</ul>
<template id="list-item">
<li class="mdc-list-item" tabindex="0" data-id="listitem">
<span class="material-icons" data-id="arrow"> arrow_right </span>
<span class="mdc-list-item__ripple"></span>
<span class="material-icons" data-id="icon"> folder </span>
<span class="mdc-list-item__text" data-id="title"></span>
</li>
</template>