VUE3 插件 vue-codemirror 使用步骤和实例、基于 CodeMirror ，适用于 Vue 的 Web 代码编辑器。

第一步：安装 vue-codemirror & codemirror 包 ， 以及语言包 

npm install codemirror --save
npm install vue-codemirror --save

npm install @codemirror/lang-javascript --save
npm install @codemirror/lang-python --save

npm install @codemirror/lang-cpp --save
npm install @codemirror/theme-one-dark --save

第二步：在需要的组件中配置

src\components\code\Index.vue

<script setup>
import {
  watch, ref, toRefs , computed
} from 'vue';
import { Codemirror } from 'vue-codemirror';
import { javascript } from '@codemirror/lang-javascript';
import { python } from '@codemirror/lang-python';
import { oneDark } from '@codemirror/theme-one-dark';
const code = ref('');
const props = defineProps({
    modelValue: {
        type: String,
        required: false,
        default: ''
    },
    language: {
        type: String,
        default: 'javascript'
    },
    disabled: {
        type: [String, Boolean],
        default: false
    },
    style: {
        type: [Object],
        default: () => ({
            height: '400px'
        })
    }
})
const emit = defineEmits(['update:modelValue'])
const {modelValue, language, disabled, style } = toRefs(props)
const fullScreen = ref(false);
const lang = { javascript, python }[language.value];
const extensions = [lang(), oneDark]
watch(() => modelValue.value, (val) => {
    code.value = val;
});
watch(code.value, (val) => {
    emit('update:modelValue', val);
});
const comStyle = computed(() => ({ ...style.value, ...{ height: fullScreen.value ? '100%' : '400px' } }));
</script>
<template>
    <Codemirror 
        :disabled="disabled" 
        v-model="code" 
        placeholder="暂无数据..." 
        :style="comStyle" 
        :autofocus="true"
        :indent-with-tab="true" 
        :tabSize="2" 
        :fullScreen="true" 
        :extensions="extensions" 
        @ready="() => {}" 
        @change="() => {}"
        @focus="() => {}" 
        @blur="() => {}"
    ></Codemirror>
</template>

 第三步：使用

<script setup lang="ts">
import { ref } from 'vue'
import Code  from '@common/code/Index.vue'

const fetchTxtFileData = ref('你好 世界!')
</script>

<template>
    <Code v-model="fetchTxtFileData" :style="{width: '47vw'}"></Code>
</template>

  第四步：最后效果