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Get Showdown.js, which is required to change the style JS

This is their github, Https://github.com/showdownjs/showdown.
But let's use the introduced Bootcdn showdown.min.js.
http://www.bootcdn.cn/showdown/

Introduction to the settings in the Web site HTML

<script src="https://cdn.bootcss.com/showdown/1.8.6/showdown.js"></script>

Our article is in a div with ID Postcont

<!--文章内容开始-->    <div id="postcont" style="white-space: pre">文章内容</div>    <script>    var converter = new showdown.Converter();    var post      = document.getElementById('postcont');    var  text      = post.textContent||post.innerText;//获取文本内容， post.textContent是非ie所用，post.innerText是ie所用，    var html      = converter.makeHtml(text);          //这里写成这样是为了兼容    post.innerHTML=html;    </script>    <!--文章内容结束-->

Effect:

Enable your site to support Markdown