hexo文章外链模仿知乎卡片式链接

背景

逛知乎时看见知乎上的卡片式分享链接，挺吸引我的，所谓不折腾不死，我这样一个不会自己研究又想实现的人，遂寻求谷歌大法解决，最后让我找着了。以下便是实现的过程。

第一步：新建

首先在主题目录下，在next/source/css/js/下新建一个linkcard.js文件，并写入如下内容：

Javascript

window.onload=function(){
		var LinkCards=document.getElementsByClassName('LinkCard');
		if(LinkCards.length != 0){
		var LinkCard=LinkCards[0];
		var link=LinkCard.href;
		var title=LinkCard.innerText;
		LinkCard.innerHTML="<style type=text/css>.LinkCard,.LinkCard:hover{text-decoration:none;border:none!important;color:inherit!important}.LinkCard{position:relative;display:block;margin:1em auto;width:390px;box-sizing:border-box;border-radius:12px;max-width:100%;overflow:hidden;color:inherit;text-decoration:none}.ztext{word-break:break-word;line-height:1.6}.LinkCard-backdrop{position:absolute;top:0;left:0;right:0;bottom:0;background-repeat:no-repeat;-webkit-filter:blur(20px);filter:blur(20px);background-size:cover;background-position:center}.LinkCard,.LinkCard:hover{text-decoration:none;border:none!important;color:inherit!important}.LinkCard-content{position:relative;display:flex;align-items:center;justify-content:space-between;padding:12px;border-radius:inherit;background-color:rgba(246,246,246,0.88)}.LinkCard-text{overflow:hidden}.LinkCard-title{display:-webkit-box;-webkit-line-clamp:2;overflow:hidden;text-overflow:ellipsis;max-height:calc(16px * 1.25 * 2);font-size:16px;font-weight:500;line-height:1.25;color:#1a1a1a}.LinkCard-meta{display:flex;margin-top:4px;font-size:14px;line-height:20px;color:#999;white-space:nowrap}.LinkCard-imageCell{margin-left:8px;border-radius:6px}.LinkCard-image{display:block;width:60px;height:auto;border-radius:inherit;margin-bottom:0!important}</style><span class=LinkCard-backdrop style=background-image:url(/images/logo.svg)></span><span class=LinkCard-content><span class=LinkCard-text><span class=LinkCard-title>"+title+"</span><span class=LinkCard-meta><span style=display:inline-flex;align-items:center><svg class="+"'Zi Zi--InsertLink'"+" fill=currentColor viewBox="+"'0 0 24 24'"+" width=17 height=17><path d="+"'M6.77 17.23c-.905-.904-.94-2.333-.08-3.193l3.059-3.06-1.192-1.19-3.059 3.058c-1.489 1.489-1.427 3.954.138 5.519s4.03 1.627 5.519.138l3.059-3.059-1.192-1.192-3.059 3.06c-.86.86-2.289.824-3.193-.08zm3.016-8.673l1.192 1.192 3.059-3.06c.86-.86 2.289-.824 3.193.08.905.905.94 2.334.08 3.194l-3.059 3.06 1.192 1.19 3.059-3.058c1.489-1.489 1.427-3.954-.138-5.519s-4.03-1.627-5.519-.138L9.786 8.557zm-1.023 6.68c.33.33.863.343 1.177.029l5.34-5.34c.314-.314.3-.846-.03-1.176-.33-.33-.862-.344-1.176-.03l-5.34 5.34c-.314.314-.3.846.03 1.177z'"+" fill-rule=evenodd></path></svg></span>"+link+"</span></span><span class=LinkCard-imageCell><img class=LinkCard-image alt=logo src=/images/logo.svg></span></span>";

		for (var i = LinkCards.length - 1; i >= 1; i--) {
		LinkCard=LinkCards[i];
		title=LinkCard.innerText;
		link=LinkCard.href;
		LinkCard.innerHTML="<span class=LinkCard-backdrop style=background-image:url(/images/logo.svg)></span><span class=LinkCard-content><span class=LinkCard-text><span class=LinkCard-title>"+title+"</span><span class=LinkCard-meta><span style=display:inline-flex;align-items:center><svg class="+"'Zi Zi--InsertLink'"+" fill=currentColor viewBox="+"'0 0 24 24'"+" width=17 height=17><path d="+"'M6.77 17.23c-.905-.904-.94-2.333-.08-3.193l3.059-3.06-1.192-1.19-3.059 3.058c-1.489 1.489-1.427 3.954.138 5.519s4.03 1.627 5.519.138l3.059-3.059-1.192-1.192-3.059 3.06c-.86.86-2.289.824-3.193-.08zm3.016-8.673l1.192 1.192 3.059-3.06c.86-.86 2.289-.824 3.193.08.905.905.94 2.334.08 3.194l-3.059 3.06 1.192 1.19 3.059-3.058c1.489-1.489 1.427-3.954-.138-5.519s-4.03-1.627-5.519-.138L9.786 8.557zm-1.023 6.68c.33.33.863.343 1.177.029l5.34-5.34c.314-.314.3-.846-.03-1.176-.33-.33-.862-.344-1.176-.03l-5.34 5.34c-.314.314-.3.846.03 1.177z'"+" fill-rule=evenodd></path></svg></span>"+link+"</span></span><span class=LinkCard-imageCell><img class=LinkCard-image alt=logo src=/images/logo.svg></span></span>";
		}
	}
}

然后在next/layout/_layout.swig文件中引入linkcard.js

Code

  {% include '_third-party/rating.swig' %}
  {% include '_third-party/pangu.swig' %}
  {% include '_third-party/scroll-cookie.swig' %}
  {% include '_third-party/bookmark.swig' %}
  {% include '_third-party/copy-code.swig' %}
  {% include '_custom/custom.swig' %}
+  <script type="text/javascript" src="/js/linkcard.js"></script>
</body>

第二步：使用

其中需要注意的是linkcard.js文件中有两个图片链接<span class=LinkCard-backdrop style=background-image:url(/images/logo.svg)></span>以及<span class=LinkCard-imageCell><img class=LinkCard-image alt=logo src=/images/logo.svg></span>前者是卡片的背景，后者是卡片右侧的logo。

然后使用的话，很简单，只要在引用链接的时候在markdown中以如下格式书写链接就可以：

长弓不是弓长

html

<a href="http://52chang.wang" class="LinkCard">长弓不是弓长</a>