vue中封装一个基于codemirror的专门适用于json的富文本编辑器组件

项目中我们可能会遇到编辑json情况，尤其是json还比较大的时候，input 自带的textarea可能无法满足我们的需求，所有如果有一个便捷的json富文本编辑器就会方便很多，可以参考下面的组件案例：

1. 首先需要安装依赖 codemirror、script-loader、jsonlint

npm install codemirror
npm install --save script-loader
npm install --save jsonlint

2. 封装一个vue组件

<template>
  <div class="json-editor">
    <textarea ref="textarea" />
  </div>
</template>
<style scoped>
.json-editor {
  height: calc(100vh - 600px);
  min-height: 400px;
  line-height: 20px;
}
.json-editor >>> .CodeMirror {
    height: 100%;
    min-height: 300px;
}
.json-editor >>> .CodeMirror-scroll {
    min-height: 300px;
}
.json-editor >>> .cm-s-rubyblue span.cm-string {
    color: #F08047;
}
</style>
<script>
import CodeMirror from 'codemirror'
import 'codemirror/addon/lint/lint.css'
import 'codemirror/lib/codemirror.css'
import 'codemirror/theme/idea.css'
import 'codemirror/mode/javascript/javascript'
import 'codemirror/addon/lint/lint'
import 'codemirror/addon/lint/json-lint'
// eslint-disable-next-line
require('script-loader!jsonlint')

export default {
  name: 'JsonEditor',
  /* eslint-disable vue/require-prop-types */
  props: ['value'],
  data () {
    return {
      jsonEditor: false
    }
  },
  watch: {
    value (value) {
      const editorValue = this.jsonEditor.getValue()
      if (value !== editorValue) {
        this.jsonEditor.setValue(JSON.stringify(this.value, null, 2))
      }
    }
  },
  mounted () {
    this.jsonEditor = CodeMirror.fromTextArea(this.$refs.textarea, {
      lineNumbers: true,
      mode: 'application/json',
      gutters: ['CodeMirror-lint-markers'],
      theme: 'idea',
      lint: true
    })

    this.jsonEditor.setValue(JSON.stringify(this.value, null, 2))
    this.jsonEditor.on('change', cm => {
      this.$emit('changed', cm.getValue())
      this.$emit('input', cm.getValue())
    })
  },
  methods: {
    getValue () {
      return this.jsonEditor.getValue()
    }
  }
}
</script>

3. 封装调用

<json-editor ref="jsonEditor" v-model="resources" />
...
import JsonEditor from './view/json_editor'
...
components: { JsonEditor }
...
data () {
    return {
      resources: {},
    }
  },