安装

npm install codemirror
注意版本，不要使用新版
"codemirror": "5.65.8",

组件

<template>
  <div class="in-coder-panel">
    <textarea :ref="textareaRef" v-model="code" autofocus="true"></textarea>
  </div>
</template>

<script type="text/ecmascript-6">
import CodeMirror from "codemirror";

import "codemirror/lib/codemirror.css";

import "codemirror/theme/solarized.css";
import "codemirror/theme/idea.css";
import "codemirror/theme/darcula.css";

import "codemirror/addon/hint/show-hint.css";
import "codemirror/addon/hint/show-hint.js";
import "codemirror/addon/hint/sql-hint.js";

import "codemirror/mode/sql/sql.js";

export default {
  name: "in-coder",
  props: {
    value: String,

    textareaRef: {
      type: String,
      default: "",
    },
  },
  data() {
    return {
      CodeMirror: null,
      code: "select gg ",
      coder: null,
      options: {
        tabSize: 2,
        lineNumbers: true,
        line: true,
        mode: "text/x-mysql",
        theme: "darcula",
        readOnly: false,
        lineWrapping: false,
        autofocus: true,
        styleActiveLine: true,
        lint: true, // 代码出错提醒
        matchBrackets: true,
        extraKeys: { Tab: "autocomplete" }, //Tab可以弹出选择项
        hintOptions: {
          completeSingle: false,
          alignWithWord: false,
          hint: CodeMirror.hint.sql,
        },
      },
    };
  },
  mounted() {
    this._initialize();
  },
  methods: {
    show() {
      alert(this.code);
    },
    _initialize() {
      this.coder = CodeMirror.fromTextArea(
        this.$refs[this.textareaRef],
        this.options
      );
      this.coder.setSize("100%", "400px");
      this.coder.setValue(this.value || this.code);
      this.coder.on("change", (coder, changeObj) => {
        this.code = coder.getValue();
        if (/^[a-zA-Z.]/.test(changeObj.text[0])) {
          coder.showHint();
        }
      });

    
    },
  },
};
</script>

<style>
.in-coder-panel {
  flex-grow: 1;
  display: flex;
  position: relative;
}
.CodeMirror {
  flex-grow: 1;
  z-index: 1;
  height: auto;
}

.CodeMirror-code {
  line-height: 22px;
  font-size: 17px;
}

.code-mode-select {
  position: absolute;
  z-index: 2;
  right: 10px;
  top: 10px;
  max-width: 130px;
}
</style>

父组件调用

import Codemirror from "@/components/common/codemirror.vue";

 components: {
    Codemirror,
  },

<Codemirror ref="cm" textareaRef="aaa" value="--请输入查询的Sql语句"></Codemirror>

//父组件从子组件取值
this.$refs.cm.code,