一、前期准备

此组件的功能主要依赖于codemirror，另外加入了js-yaml进行语法检查，方便在实时编辑时提示语法不正确的地方。因此首先需要在项目中安装codemirror与js-yaml:
codemirror: npm install codemirror
js-yaml: npm install js-yaml --save

二、组件源码及说明

新建@/components/YamlEditor/index.vue文件：

<template>
  <div class="yaml-editor">
    <textarea ref="textarea" />
  </div>
</template>

<script>
import CodeMirror from 'codemirror'
import 'codemirror/addon/lint/lint.css'
import 'codemirror/lib/codemirror.css'
import 'codemirror/theme/erlang-dark.css'
import 'codemirror/mode/yaml/yaml'
import 'codemirror/addon/lint/lint'
import 'codemirror/addon/lint/yaml-lint'
// import "codemirror/theme/monokai.css"; 
// 提示弹窗
import 'codemirror/addon/dialog/dialog.js'
import 'codemirror/addon/dialog/dialog.css'
// 滚动条
import 'codemirror/addon/scroll/simplescrollbars.css'
import 'codemirror/addon/scroll/simplescrollbars.js'
// 搜索功能
import 'codemirror/addon/search/search.js'
import 'codemirror/addon/search/searchcursor.js'
import 'codemirror/addon/search/jump-to-line.js'
// 全屏
import 'codemirror/addon/display/fullscreen.js'
import 'codemirror/addon/display/fullscreen.css'
import "codemirror/addon/selection/active-line"; // 代码高亮

window.jsyaml = require('js-yaml') // 引入js-yaml为codemirror提高语法检查核心支持

export default {
  name: 'YamlEditor',
  // eslint-disable-next-line vue/require-prop-types
  props: ['value'],
  data() {
    return {
      yamlEditor: false
    }
  },
  watch: {
    value(value) {
      const editorValue = this.yamlEditor.getValue()
      if (value !== editorValue) {
        this.yamlEditor.setValue(this.value)
      }
    }
  },
  mounted() {
    this.yamlEditor = CodeMirror.fromTextArea(this.$refs.textarea, {
      lineNumbers: true, // 显示行号
      mode: 'text/x-yaml', // 语法model
      gutters: ['CodeMirror-lint-markers'],  // 语法检查器
      theme: 'monokai', // 编辑器主题
      lint: true // 开启语法检查
    })

    this.yamlEditor.setValue(this.value)
    this.yamlEditor.on('change', (cm) => {
      this.$emit('changed', cm.getValue())
      this.$emit('input', cm.getValue())
    })
  },
  methods: {
    getValue() {
      return this.yamlEditor.getValue()
    }
  }
}
</script>

<style scoped>
.yaml-editor{
  height: 100%;
  position: relative;
}
.yaml-editor >>> .CodeMirror {
  height: auto;
  min-height: 300px;
}
.yaml-editor >>> .CodeMirror-scroll{
  min-height: 300px;
}
.yaml-editor >>> .cm-s-rubyblue span.cm-string {
  color: #F08047;
}
</style>

codemirror的核心配置如下：

    this.yamlEditor = CodeMirror.fromTextArea(this.$refs.textarea, {
      lineNumbers: true, // 显示行号
      mode: 'text/x-yaml', // 语法model
      gutters: ['CodeMirror-lint-markers'],  // 语法检查器
      theme: 'monokai', // 编辑器主题
      lint: true,// 开启语法检查
       lineWrapping: true,           // 自动换行
      fullScreenChange: true,      // 全屏
       extraKeys: {
            "F11": function (cm) {
              cm.setOption("fullScreen", !cm.getOption("fullScreen"));
            },
            "Esc": function (cm) {
              if (cm.getOption("fullScreen")) cm.setOption("fullScreen", false);
            }
          },
        smartIndent: true,  
    })

这里的配置只有几个简单的参数，个人认为有这些功能已经足够了，更多的详细参数配置可以移步官方文档；如果想让编辑器支持其他语言，可以查看codemirror官方文档的语法支持，这里我个人比较倾向下载codemirror源码，可以看到对应语法demo的源代码，使用不同的语法在本组件中import相应的依赖即可。如需要更多的**主题**

三、组件使用

<template>
  <div>
    <div class="editor-container">
      <yaml-editor  v-model="value" />
    </div>
  </div>
</template>

<script>
import YamlEditor from '@/components/YamlEditor/index.vue';

const yamlData = "- hosts: all\n  become: yes\n  become_method: sudo\n  gather_facts: no\n\n  tasks:\n  - name: \"install {{ package_name }}\"\n    package:\n      name: \"{{ package_name }}\"\n      state: \"{{ state | default('present') }}\"";

export default {
  name: 'YamlEditorDemo',
  components: { YamlEditor },
  data() {
    return {
      value: yamlData,
    };
  },
};
</script>
<style scoped>
.editor-container{
  position: relative;
  height: 100%;
}
</style>

四、效果截图

使用效果：

语法检测效果：