我正在尝试解析标题列表(h1
,h2
等),以便在结构良好的javascript变量中获取内容表(有点像树)。
以下是我的文档结构:
<div id="content">
<h1>The content</h1>blah
<h2 class="show-in-toc">Test 1</h2>
<h3 class="show-in-toc">Test 1.1</h3>
<h3 class="show-in-toc">Test 1.2</h3>
<h4 class="show-in-toc">Test 1.2.1</h4>
<h4 class="show-in-toc">Test 1.2.2</h4>
<h2 class="show-in-toc">Test 2</h2>
<h3 class="show-in-toc">Test 2.1</h3>
<h4 class="show-in-toc">Test 2.1.1</h4>
<h3 class="show-in-toc">Test 2.2</h3>
</div>
这就是我想要的:
[
{"text": "Test 1","level": 2, "children": [
{"text": "Test 1.1","level": 3,"children": []},
{"text": "Test 1.2", "level": 3, "children": [
{"text": "Test 1.2.1", "level": 4, "children": []},
{"text": "Test 1.2.2", "level": 4, "children": []}
]}
]},
{"text": "Test 2", "level": 2, "children": [
{"text": "Test 2.1", "level": 3, "children": [
{"text": "Test 2.1.1", "level": 4, "children": []}
]},
{"text": "Test 2.2", "level": 3, "children": []}
]}
]
我猜这个函数应该是递归的,看起来像这样:
headings = $('.show-in-toc:header'); // Maybe .toArray() ?
toc = generateToc(headings, 2); // With 2 being the starting level
我尝试激发算法from this subject,但我没有得到任何结果(他们直接将结果放入dom元素中)。
你有什么建议可以指导我吗?提前谢谢
答案 0 :(得分:0)
我终于设法做了我想要的算法,感谢那些给我一点提示的评论。在这里the result on a JSFiddle,我会解释它并稍后对其进行评论,即使它很容易理解。
function headerTagToObject(tag, level) {
tag = $(tag);
return {
'title': tag.text(),
'level': level,
'children': []
}
}
function generateToc(level, filter = undefined, initial_parent = undefined, parent = undefined) {
var result, tags;
result = [];
if (parent) {
tags = $(parent).nextUntil('h' + (level - 1), 'h' + level).filter(filter);
} else {
if (initial_parent) {
tags = $(initial_parent).find('h' + level).filter(filter);
} else {
tags = $('h' + level).filter(filter);
}
}
tags.each(function(i, tag) {
var tagResult;
tagResult = headerTagToObject(tag, level);
tagResult['children'] = generateToc(level + 1, filter, initial_parent, tag);
result.push(tagResult);
});
return result;
}
// Usage
result = generateToc(2, '.show-in-toc', '#content');