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vue使用markdown编辑与展示

1.Vue显示markdown的html页面

1.1 mark编辑

下载包
```
npm install mavon-editor --save
```

使用在main.js中引入

import mavonEditor from 'mavon-editor'
import 'mavon-editor/dist/css/index.css'
Vue.use(mavonEditor)

在子组建使用

html中

<FormItem>
            <mavon-editor :style="{ zIndex: '0','54rem'}" ref="md" :toolbars="markdownOption" v-model="formInline.content" @imgAdd="imgAdd" @imgDel="imgDel"/>
          </FormItem>
# 这里绑定imgAdd为添加图片，为访问后台，添加图片，后台返回对应url
# imgDel为删除图片，回掉函数去访问后台删除对应函数。

js中

// data 中添加markdown要求功能
markdownOption: {
        bold: true, // 粗体
        italic: true, // 斜体
        header: true, // 标题
        underline: true, // 下划线
        mark: true, // 标记
        superscript: true, // 上角标
        quote: true, // 引用
        ol: true, // 有序列表
        link: true, // 链接
        imagelink: true, // 图片链接
        help: true, // 帮助
        code: true, // code
        subfield: true, // 是否需要分栏
        fullscreen: true, // 全屏编辑
        readmodel: true, // 沉浸式阅读
        /* 1.3.5 */
        undo: true, // 上一步
        trash: true, // 清空
        save: true, // 保存（触发events中的save事件）
        /* 1.4.2 */
        navigation: true // 导航目录
      },
// methods中定义方法
imgAdd (pos, $file) {
			// $file 为文件
      // pos 为插入图片索引位置，这里把图片路径放在一个list中也就是img_file
      console.log($file)
      // 第一步.将图片上传到服务器.
      var formdata = new FormData()
      formdata.append('image', $file)
      this.img_file[pos] = $file
      console.log(this.$http.defaults.baseURL + '/upload/content/picture')
      axios({
        // 请求地址
        url: this.$http.defaults.baseURL + '/upload/content/picture',
        method: 'post',
        data: formdata,
        headers: { 'Content-Type': 'multipart/form-data' }
      }).then((data) => {
        // console.log(JSON.stringify(url))
        // 第二步.将返回的url替换到文本原位置![...](./0) -> ![...](url)
        /**
         * $vm 指为mavonEditor实例，可以通过如下两种方式获取
         * 1.  通过引入对象获取: `import {mavonEditor} from ...` 等方式引入后，`$vm`为`mavonEditor`
         * 2. 通过$refs获取: html声明ref : `<mavon-editor ref=md ></mavon-editor>，`$vm`为 `this.$refs.md`
         * 3. 由于vue运行访问的路径只能在static下，so，我就把图片保存到它这里了
         */
        this.$refs.md.$img2Url(pos, data.data.result.urlpath)
      })
    },
// 这里是做一个列表删除。
imgDel (pos) {
      delete this.img_file[pos]
    },

1.2 markdown实现html显示

导包

npm install highlight.js --save
npm install marked --save

main.js引入

// 代码高亮
import hljs from 'highlight.js'
Vue.directive('highlight', (el) => {
  let blocks = el.querySelectorAll('pre code')
  blocks.forEach((block) => {
    hljs.highlightBlock(block)
  })
})

组建中使用

<div class="passage">
			// v-highlight 代码高亮， 绑定 content
      <div v-highlight v-html="content" class="content"></div>
    </div>
<script>
import marked from 'marked'
...
// 通过marked将返回Markdown文本转换html
this.content = marked(mkdContent)
</script>

下面是markdown的css样式

<style>
h1, h2, h3, h4 {
  color: #111111;
  font-weight: 400;
  margin-top: 1em;
}

h1, h2, h3, h4, h5 {
  font-family: Georgia, Palatino, serif;
}
h1, h2, h3, h4, h5, p , dl{
  margin-bottom: 16px;
  padding: 0;
}
h1 {
  font-size: 48px;
  line-height: 54px;
}
h2 {
  font-size: 36px;
  line-height: 42px;
}
h1, h2 {
  border-bottom: 1px solid #EFEAEA;
  padding-bottom: 10px;
}
h3 {
  font-size: 24px;
  line-height: 30px;
}
h4 {
  font-size: 21px;
  line-height: 26px;
}
h5 {
  font-size: 18px;
  list-style: 23px;
}
a {
  color: #0099ff;
  margin: 0;
  padding: 0;
  vertical-align: baseline;
}
a:hover {
  text-decoration: none;
  color: #ff6600;
}
a:visited {
  /*color: purple;*/
}
ul, ol {
  padding: 0;
  padding-left: 24px;
  margin: 0;
}
li {
  line-height: 24px;
}
p, ul, ol {
  font-size: 16px;
  line-height: 24px;
}

ol ol, ul ol {
  list-style-type: lower-roman;
}

/*pre {
    padding: 0px 24px;
    max- 800px;
    white-space: pre-wrap;
}
code {
    font-family: Consolas, Monaco, Andale Mono, monospace;
    line-height: 1.5;
    font-size: 13px;
}*/

code, pre {
  border-radius: 3px;
  background-color:#f7f7f7;
  color: inherit;
}

code {
  font-family: Consolas, Monaco, Andale Mono, monospace;
  margin: 0 2px;
}

pre {
  line-height: 1.7em;
  overflow: auto;
  padding: 6px 10px;
  border-left: 5px solid #6CE26C;
  background: #cacaca;
   49rem;
}

pre > code {
  border: 0;
  display: inline;
  max- initial;
  padding: 0;
  margin: 0;
  overflow: initial;
  line-height: inherit;
  font-size: .85em;
  white-space: pre;
  background: 0 0;

}

code {
  color: #666555;
}
/** markdown preview plus 对于代码块的处理有些问题, 所以使用统一的颜色 */
/*code .keyword {
  color: #8959a8;
}

code .number {
  color: #f5871f;
}

code .comment {
  color: #998
}*/

aside {
  display: block;
  float: right;
   390px;
}
blockquote {
  border-left:.5em solid #eee;
  padding: 0 0 0 2em;
  margin-left:0;
}
blockquote  cite {
  font-size:14px;
  line-height:20px;
  color:#bfbfbf;
}
blockquote cite:before {
  content: '2014 0A0';
}

blockquote p {
  color: #666;
}
hr {
  text-align: left;
  color: #999;
  height: 2px;
  padding: 0;
  margin: 16px 0;
  background-color: #e7e7e7;
  border: 0 none;
}

dl {
  padding: 0;
}

dl dt {
  padding: 10px 0;
  margin-top: 16px;
  font-size: 1em;
  font-style: italic;
  font-weight: bold;
}

dl dd {
  padding: 0 16px;
  margin-bottom: 16px;
}

dd {
  margin-left: 0;
}

/* Code below this line is copyright Twitter Inc. */

button,
input,
select,
textarea {
  font-size: 100%;
  margin: 0;
  vertical-align: baseline;
  *vertical-align: middle;
}
button, input {
  line-height: normal;
  *overflow: visible;
}
button::-moz-focus-inner, input::-moz-focus-inner {
  border: 0;
  padding: 0;
}
button,
input[type="button"],
input[type="reset"],
input[type="submit"] {
  cursor: pointer;
  -webkit-appearance: button;
}
input[type=checkbox], input[type=radio] {
  cursor: pointer;
}
/* override default chrome & firefox settings */
input:not([type="image"]), textarea {
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;
}

input[type="search"] {
  -webkit-appearance: textfield;
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;
}
input[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none;
}
label,
input,
select,
textarea {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 13px;
  font-weight: normal;
  line-height: normal;
  margin-bottom: 18px;
}
input[type=checkbox], input[type=radio] {
  cursor: pointer;
  margin-bottom: 0;
}
input[type=text],
input[type=password],
textarea,
select {
  display: inline-block;
   210px;
  padding: 4px;
  font-size: 13px;
  font-weight: normal;
  line-height: 18px;
  height: 18px;
  color: #808080;
  border: 1px solid #ccc;
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  border-radius: 3px;
}
select, input[type=file] {
  height: 27px;
  line-height: 27px;
}
textarea {
  height: auto;
}
/* grey out placeholders */
:-moz-placeholder {
  color: #bfbfbf;
}
::-webkit-input-placeholder {
  color: #bfbfbf;
}
input[type=text],
input[type=password],
select,
textarea {
  -webkit-transition: border linear 0.2s, box-shadow linear 0.2s;
  -moz-transition: border linear 0.2s, box-shadow linear 0.2s;
  transition: border linear 0.2s, box-shadow linear 0.2s;
  -webkit-box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
  -moz-box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}
input[type=text]:focus, input[type=password]:focus, textarea:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  -webkit-box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1), 0 0 8px rgba(82, 168, 236, 0.6);
  -moz-box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1), 0 0 8px rgba(82, 168, 236, 0.6);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1), 0 0 8px rgba(82, 168, 236, 0.6);
}
/* buttons */
button {
  display: inline-block;
  padding: 4px 14px;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 13px;
  line-height: 18px;
  -webkit-border-radius: 4px;
  -moz-border-radius: 4px;
  border-radius: 4px;
  -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
  -moz-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
  background-color: #0064cd;
  background-repeat: repeat-x;
  background-image: -khtml-gradient(linear, left top, left bottom, from(#049cdb), to(#0064cd));
  background-image: -moz-linear-gradient(top, #049cdb, #0064cd);
  background-image: -ms-linear-gradient(top, #049cdb, #0064cd);
  background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #049cdb), color-stop(100%, #0064cd));
  background-image: -webkit-linear-gradient(top, #049cdb, #0064cd);
  background-image: -o-linear-gradient(top, #049cdb, #0064cd);
  background-image: linear-gradient(top, #049cdb, #0064cd);
  color: #fff;
  text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
  border: 1px solid #004b9a;
  border-bottom-color: #003f81;
  -webkit-transition: 0.1s linear all;
  -moz-transition: 0.1s linear all;
  transition: 0.1s linear all;
  border-color: #0064cd #0064cd #003f81;
  border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
}
button:hover {
  color: #fff;
  background-position: 0 -15px;
  text-decoration: none;
}
button:active {
  -webkit-box-shadow: inset 0 3px 7px rgba(0, 0, 0, 0.15), 0 1px 2px rgba(0, 0, 0, 0.05);
  -moz-box-shadow: inset 0 3px 7px rgba(0, 0, 0, 0.15), 0 1px 2px rgba(0, 0, 0, 0.05);
  box-shadow: inset 0 3px 7px rgba(0, 0, 0, 0.15), 0 1px 2px rgba(0, 0, 0, 0.05);
}
button::-moz-focus-inner {
  padding: 0;
  border: 0;
}
table {
  *border-collapse: collapse; /* IE7 and lower */
  border-spacing: 0;
   51rem;
}
table {
  border: solid #ccc 1px;
  -moz-border-radius: 6px;
  -webkit-border-radius: 6px;
  border-radius: 6px;
  /*-webkit-box-shadow: 0 1px 1px #ccc;
  -moz-box-shadow: 0 1px 1px #ccc;
  box-shadow: 0 1px 1px #ccc;   */
}
table tr:hover {
  background: #fbf8e9;
  -o-transition: all 0.1s ease-in-out;
  -webkit-transition: all 0.1s ease-in-out;
  -moz-transition: all 0.1s ease-in-out;
  -ms-transition: all 0.1s ease-in-out;
  transition: all 0.1s ease-in-out;
}
table td, .table th {
  border-left: 1px solid #ccc;
  border-top: 1px solid #ccc;
  padding: 10px;
  text-align: left;
}

table th {
  background-color: #dce9f9;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#ebf3fc), to(#dce9f9));
  background-image: -webkit-linear-gradient(top, #ebf3fc, #dce9f9);
  background-image:    -moz-linear-gradient(top, #ebf3fc, #dce9f9);
  background-image:     -ms-linear-gradient(top, #ebf3fc, #dce9f9);
  background-image:      -o-linear-gradient(top, #ebf3fc, #dce9f9);
  background-image:         linear-gradient(top, #ebf3fc, #dce9f9);
  /*-webkit-box-shadow: 0 1px 0 rgba(255,255,255,.8) inset;
  -moz-box-shadow:0 1px 0 rgba(255,255,255,.8) inset;
  box-shadow: 0 1px 0 rgba(255,255,255,.8) inset;*/
  border-top: none;
  text-shadow: 0 1px 0 rgba(255,255,255,.5);
  padding: 5px;
}

table td:first-child, table th:first-child {
  border-left: none;
}

table th:first-child {
  -moz-border-radius: 6px 0 0 0;
  -webkit-border-radius: 6px 0 0 0;
  border-radius: 6px 0 0 0;
}
table th:last-child {
  -moz-border-radius: 0 6px 0 0;
  -webkit-border-radius: 0 6px 0 0;
  border-radius: 0 6px 0 0;
}
table th:only-child{
  -moz-border-radius: 6px 6px 0 0;
  -webkit-border-radius: 6px 6px 0 0;
  border-radius: 6px 6px 0 0;
}
table tr:last-child td:first-child {
  -moz-border-radius: 0 0 0 6px;
  -webkit-border-radius: 0 0 0 6px;
  border-radius: 0 0 0 6px;
}
table tr:last-child td:last-child {
  -moz-border-radius: 0 0 6px 0;
  -webkit-border-radius: 0 0 6px 0;
  border-radius: 0 0 6px 0;
}
.passage {
  padding-left: 4rem;
   59rem;
}
.article-title {
  margin: 0;
  padding: 0;
  display: block;
  font-size: 2em;
  margin-block-start: 0.67em;
  margin-block-end: 0.67em;
  margin-inline-start: 0px;
  margin-inline-end: 0px;
  text-align: left;
  color: #000;
  border: 0px;
  font-weight: bold;
  float: left;
  line-height: 1.5;
   100%;
  padding-left: 5px;
}
/*.v-enter{*/
/*  opacity: 0*/
/*}*/
/*.v-enter-active{*/
/*  transition: opacity 3s;*/
/*}*/
/*!* 隐藏动画效果 *!*/
/*.v-leave-to{*/
/*  opacity: 0;*/
/*}*/
/*.v-leave-active {*/
/*  transition: opacity 3s;*/
/*}*/
.v-enter,.v-leave-to{
  transform: translateX(150px);
}
/*入场(离场)动画的时间段   */
.v-enter-active,.v-leave-active{
  transition: all 0.8s ease;

}
.my-enter,.my-leave-to{
  transform: translateY(70px);
}
.my-enter-active,.my-leave-active{
  transition: all 0.8s ease;

}
</style>

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原文地址：https://www.cnblogs.com/xujunkai/p/13583978.html