0. 效果图

列表实现参考: 列表实现代码

1. 依赖安装

npm install codemirror codemirror-editor-vue3 jsonlint-mod

2. 组件封装

code-mirror-editor.vue

<template>
  <VueCodeMirror
    class="json-editor"
    ref="CodeMirrorRef"
    :options="state.cmOptions"
    v-model:value="state.value"
    v-bind="$attrs"
    @keydown="onKeyDown"
    @mousedown="onMouseDown"
    @change="onChange"
  />
</template>
<script lang="ts" setup>
import VueCodeMirror, { CmComponentRef } from 'codemirror-editor-vue3';
import { Form } from 'ant-design-vue';
// language
import 'codemirror/mode/javascript/javascript.js';
// theme 主题
import 'codemirror/theme/monokai.css';
// 折叠功能
import 'codemirror/addon/fold/foldcode.js';
import 'codemirror/addon/fold/foldgutter.js';
import 'codemirror/addon/fold/foldgutter.css';
import 'codemirror/addon/fold/brace-fold.js';
// 自动提示
import 'codemirror/addon/hint/show-hint.js';
import 'codemirror/addon/hint/show-hint.css';
import 'codemirror/addon/hint/javascript-hint.js';
// 代码校验 lint
import 'codemirror/addon/lint/lint.js';
import 'codemirror/addon/lint/lint.css';
import 'codemirror/addon/lint/json-lint';
import jsonlint from 'jsonlint-mod';

// 其他
import 'codemirror/addon/edit/matchbrackets.js';
import 'codemirror/addon/edit/closebrackets.js';

(window as any).jsonlint = jsonlint;

const props: any = defineProps({
  value: String,
  options: {
    type: Object,
    default: () => ({}),
  },
});

const emit = defineEmits(['update:visible', 'update:value']);
const CodeMirrorRef = ref<CmComponentRef>(null);
// 初始配置项
const cmDefaultOptions = {
  mode: 'application/javascript',
  theme: 'default',
  matchBrackets: true, //括号匹配
  autoCloseBrackets: true, // 自动补齐
  styleActiveLine: true, //line选择是是否高亮
  lineNumbers: true, //是否显示行数
  lineWrapping: true, //是否自动换行
  readOnly: false,
  matchTags: { bothTags: true }, // 将突出显示光标周围的标签
  lint: true,
  foldGutter: true, // 可将对象折叠，与下面的gutters一起使用
  gutters: ['CodeMirror-foldgutter'],
  hintOptions: {
    completeSingle: false,
  }, // 提示配置
};
const state = reactive({
  value: props.value,
  cmOptions: { ...cmDefaultOptions, ...props.options },
});
// 添加props的value变化
watch(
  () => props.value,
  values => {
    state.value = values;
  },
  { immediate: true, deep: true },
);
// Form 校验
const formItemContext = Form.useInjectFormItemContext();
const onChange = (value: string) => {
  emit('update:value', value);
  formItemContext.onFieldChange();
};

const onKeyDown = event => {
  const keyCode = event.keyCode || event.which || event.charCode;
  const keyCombination = event.ctrlKey || event.altKey || event.metaKey;
  if (!keyCombination && keyCode > 64 && keyCode < 123) {
    CodeMirrorRef.value?.cminstance.showHint({ completeSingle: false });
  }
};

const onMouseDown = () => {
  CodeMirrorRef.value?.cminstance.closeHint();
};
</script>
<style>
.CodeMirror * {
  font-family: monospace;
  font-size: 14px;
}
</style>
<style lang="less" scoped>
.json-editor {
  max-height: 320px;
  overflow-y: scroll;
}
.codemirror-container {
  width: 100%;
}
.CodeMirror {
  width: 100% !important;
}
:deep(.ant-form-item) {
  height: 100%;
  .ant-form-item-control-input {
    height: 100%;
  }
  .ant-form-item-control-input-content {
    height: 100%;
  }
}
</style>

3. 组件使用

<template>
 	<CodeMirrorEditor
       :value="getRequestCode"
       class="code-editor"
       @update:value="rewriteValues($event, 'requestParam')"
          />
</template>



<script>
const formState = reactive({
	requestParam: []
})

/**
 * 实时计算:将对应参数的值转换成对应code
 */
const getRequestCode = computed(() => {
  return JSON.stringify(formState.requestParam, null, 2);
});

/**
 * 编辑器编辑:code => 序列化后重新赋值
 */
function rewriteValues(val: string, formKey: string) {
  formState[formKey] = JSON.parse(val);
}


</script>

<style lang="less">
.code-editor {
  border: 1px solid #d9d9d9;
  min-height: 200px;
  overflow-y: scroll;
  :deep(.CodeMirror) {
    min-height: 200px;
    // max-height: 800px;
    .CodeMirror-sizer {
      margin-left: 32px !important;
    }
    .CodeMirror-gutter-wrapper {
      left: -45px !important;
    }
    .CodeMirror-linenumbers {
      width: 21px !important;
    }
  }
  :deep(.CodeMirror-scroll) {
    min-height: 200px;
    // max-height: 800px;
  }
}
</style>