Many functions of the website are implemented by js. This article mainly introduces multiple js codes that allow the blog garden blog to automatically generate chapter directory indexes. Friends who need it can refer to it. I hope it can help everyone.
A good blog post In addition to the quality of blog posts, a good organizational structure can also make readers more comfortable and convenient to read. I see that some garden friends’ blog posts in the garden are divided into chapters, and there is a table of contents index for the chapters in front of the blog posts. , after clicking on the index, you will jump to the corresponding chapter to read, and you can also return to the top of the directory. Fish Li's blog post is this kind of organization. Of course, if this structure is set manually when writing a blog post, it will be very troublesome. It undoubtedly increases the workload of writers. Wouldn't it save a lot of work if the chapter index could be automatically generated? I originally wanted to use FireBug to see how the Fish Li source code is implemented, but it seems that the js is encrypted. Then I did it myself. In fact, there wasn’t much code, it was very simple.
html code
<h3>章节1</h3> <p>这里是章节1的内容</p> <h3>章节2</h3> <p>这里是章节2的内容</p> <h3>章节3</h3> <p>这里是章节3的内容</p> <h3>章节4</h3> <p>小小代码，不值一提，如果您觉得对您还有一点用，就点个赞支持一下吧。</p>
js code
<script language="javascript" type="text/javascript">
//生成目录索引列表
function GenerateContentList()
{
var jquery_h3_list = $('#cnblogs_post_body h3');//如果你的章节标题不是h3,只需要将这里的h3换掉即可
if(jquery_h3_list.length>0)
{
var content = '<a name="_labelTop"></a>';
content += '<p id="navCategory">';
content += '<p style="font-size:18px"><b>阅读目录</b></p>';
content += '<ul>';
for(var i =0;i<jquery_h3_list.length;i++)
{
var go_to_top = '<p style="text-align: right"><a href="#_labelTop" rel="external nofollow" rel="external nofollow" >回到顶部</a><a name="_label' + i + '"></a></p>';
$(jquery_h3_list[i]).before(go_to_top);
var li_content = '<li><a href="#_label' + i + '" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >' + $(jquery_h3_list[i]).text() + '</a></li>';
content += li_content;
}
content += '</ul>';
content += '</p>';
if($('#cnblogs_post_body').length != 0 )
{
$($('#cnblogs_post_body')[0]).prepend(content);
}
}
}
GenerateContentList();
</script>Instructions for use: After logging in to the blog park , open the backend management of the blog park, switch to the "Settings" tab, paste the above code into the "Footer HTML Code" area and save it.
Note: The h3 extracted from the above js code is used as the title of the chapter. If your title is not h3, please modify it yourself in the code comment. In addition to generating a table of contents index at the beginning of the article, this code will also generate a "back to top" link in the lower right corner of each chapter (that is, the upper right corner of the next chapter title) to facilitate readers to return. Table of contents. The directory structure of this article is automatically generated. If you find it useful, try it out as soon as possible.
Original text: https://www.cnblogs.com/wangqiguo/p/4355032.html
By
Rendering:
The specific steps to add functions are:
1. Make sure that your blog park backend supports jsThis is not supported by default. I need to send an official email to apply for activation (the email address is contact@cnblogs.com). I simply wrote an email and received a reply within an hour. I only wrote two words in the email: as in the title. . . .
2. Go to the backend to add scripts
Open the backend of the blog park, enter the "Settings" tab, paste your js code in the edit box corresponding to the "footer Html code" at the bottom, and then click the "Save" button save.
3. Write articles according to format
When writing a new blog post, pay attention to dividing chapters according to the format set in your js script, such as h2, h3, etc. Of course, if previously published articles have h2, h3, etc., a directory index will be automatically generated.
<script language="javascript" type="text/javascript">
// 生成目录索引列表
// ref: http://www.cnblogs.com/wangqiguo/p/4355032.html
// modified by: zzq
function GenerateContentList()
{
var mainContent = $('#cnblogs_post_body');
var h2_list = $('#cnblogs_post_body h2');//如果你的章节标题不是h2,只需要将这里的h2换掉即可
if(mainContent.length < 1)
return;
if(h2_list.length>0)
{
var content = '<a name="_labelTop"></a>';
content += '<p id="navCategory">';
content += '<p style="font-size:18px"><b>目录</b></p>';
content += '<ul>';
for(var i=0; i<h2_list.length; i++)
{
var go_to_top = '<p style="text-align: right"><a href="#_labelTop" rel="external nofollow" rel="external nofollow" >回到顶部</a><a name="_label' + i + '"></a></p>';
$(h2_list[i]).before(go_to_top);
var h3_list = $(h2_list[i]).nextAll("h3");
var li3_content = '';
for(var j=0; j<h3_list.length; j++)
{
var tmp = $(h3_list[j]).prevAll('h2').first();
if(!tmp.is(h2_list[i]))
break;
var li3_anchor = '<a name="_label' + i + '_' + j + '"></a>';
$(h3_list[j]).before(li3_anchor);
li3_content += '<li><a href="#_label' + i + '_' + j + '" rel="external nofollow" >' + $(h3_list[j]).text() + '</a></li>';
}
var li2_content = '';
if(li3_content.length > 0)
li2_content = '<li><a href="#_label' + i + '" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >' + $(h2_list[i]).text() + '</a><ul>' + li3_content + '</ul></li>';
else
li2_content = '<li><a href="#_label' + i + '" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >' + $(h2_list[i]).text() + '</a></li>';
content += li2_content;
}
content += '</ul>';
content += '</p><p> </p>';
content += '<p style="font-size:18px"><b>正文</b></p>';
if($('#cnblogs_post_body').length != 0 )
{
$($('#cnblogs_post_body')[0]).prepend(content);
}
}
var qqinfo = '<p style="color:navy;font-size:12px">讨论QQ群：135202158</p>';
$(mainContent[0]).prepend(qqinfo);
}
GenerateContentList();
</script>
## Demonstration page: http://www.jb51.net/article/132341.htm
Reference Zhang Guo’s page, he uses
<script language="javascript" type="text/javascript">
//生成目录索引列表
function GenerateContentList() {
var jquery_h1_list = $('#content h2');
if (jquery_h1_list.length == 0) { return; }
if ($('#content').length == 0) { return; }
var content = '<a name="_labelTop"></a>';
content += '<p id="navCategory">';
content += '<p style="font-size:18px"><b>目录</b></p>';
// 一级目录 start
content += '<ul class="first_class_ul">';
for (var i = 0; i < jquery_h1_list.length; i++) {
var go_to_top = '<p style="text-align: right"><a name="_label' + i + '"></a></p>';
$(jquery_h1_list[i]).before(go_to_top);
// 一级目录的一条
var li_content = '<li><a href="#_label' + i + '" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >' + $(jquery_h1_list[i]).text() + '</a></li>';
var nextH1Index = i + 1;
if (nextH1Index == jquery_h1_list.length) { nextH1Index = 0; }
var jquery_h2_list = $(jquery_h1_list[i]).nextUntil(jquery_h1_list[nextH1Index], "h3");
// 二级目录 start
if (jquery_h2_list.length > 0) {
//li_content +='<ul style="list-style-type:none; text-align: left; margin:2px 2px;">';
li_content += '<ul class="second_class_ul">';
}
for (var j = 0; j < jquery_h2_list.length; j++) {
var go_to_top2 = '<p style="text-align: right"><a name="_lab2_' + i + '_' + j + '"></a></p>';
$(jquery_h2_list[j]).before(go_to_top2);
// 二级目录的一条
li_content += '<li><a href="#_lab2_' + i + '_' + j + '" rel="external nofollow" >' + $(jquery_h2_list[j]).text() + '</a></li>';
var nextH2Index = j + 1;
var next;
if (nextH2Index == jquery_h2_list.length) {
if (i + 1 == jquery_h1_list.length) {
next = jquery_h1_list[0];
}
else {
next = jquery_h1_list[i + 1];
}
}
else {
next = jquery_h2_list[nextH2Index];
}
var jquery_h3_list = $(jquery_h2_list[j]).nextUntil(next, "h4");
// 三级目录 start
if (jquery_h3_list.length > 0) {
li_content += '<ul class="third_class_ul">';
}
for (var k = 0; k < jquery_h3_list.length; k++) {
var go_to_third_Content = '<p style="text-align: right"><a name="_label3_' + i + '_' + j + '_' + k + '"></a></p>';
$(jquery_h3_list[k]).before(go_to_third_Content);
// 三级目录的一条
li_content += '<li><a href="#_label3_' + i + '_' + j + '_' + k + '" rel="external nofollow" >' + $(jquery_h3_list[k]).text() + '</a></li>';
}
if (jquery_h3_list.length > 0) {
li_content += '</ul>';
}
li_content += '</li>';
// 三级目录 end
}
if (jquery_h2_list.length > 0) {
li_content += '</ul>';
}
li_content += '</li>';
// 二级目录 end
content += li_content;
}
// 一级目录 end
content += '</ul>';
content += '</p>';
$($('#content')[0]).prepend(content);
}
GenerateContentList();
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