codemirror6实现在线代码编辑器使用详解

import {EditorState} from "@codemirror/state"
import {EditorView, keymap} from "@codemirror/view"
import {defaultKeymap} from "@codemirror/commands"
let startState = EditorState.create({
  // 显示文本
  doc: "Hello World",
  // 扩展，**keymap：** 配置要使用的快捷键；语言包等也是作为扩展在此配置
  extensions: [keymap.of(defaultKeymap)]
})
let view = new EditorView({
  // 状态
  state: startState,
  // 绑定元素
  parent: document.body
})

// 安装codemirror
npm i codemirror
// 这里语言包要自行安装
npm i  @codemirror/lang-javascript

<template>
  <div ref="editorRef" class="editor-main"></div>
</template>
<script lang="ts" setup>
import { basicSetup, EditorView } from "codemirror";
import { EditorState } from "@codemirror/state";
import { javascript } from "@codemirror/lang-javascript";
import {json} from '@codemirror/lang-json'
import { onMounted, ref } from "vue";
const editorRef = ref();
const editorView = ref();
const initEditor = () => {
  if (typeof editorView.value !== "undefined") {
    editorView.value.destroy();
  }
  const jsonString = `{
  root: true,
  extends: [
    "plugin:vue/vue3-essential",
    "eslint:recommended",
    "@vue/eslint-config-typescript",
    "@vue/eslint-config-prettier",
    "vue-global-api"
  ],
  parserOptions: {
    ecmaVersion: "latest",
  },
  rules: {
    "no-console": process.env.NODE_ENV === "production" ? "warn" : "off",
    "no-debugger": process.env.NODE_ENV === "production" ? "warn" : "off",
    endOfLine: "auto",
    "prettier/prettier": ["error", { "endOfLine": "auto" }]
  },
}`
  const startState = EditorState.create({
    doc:jsonString,
    extensions: [basicSetup, javascript(),json()],
  });
  if (editorRef.value) {
    editorView.value = new EditorView({
      state: startState,
      parent: editorRef.value,
    });
  }
};
// onMounted生命周期可以保证读取到dom元素
onMounted(() => {
  initEditor();
});
</script>
<style lang="scss" scoped>
.editor-main{
  width: 100vw;
  height: 100vh;
}
</style>

// 安装
npm i @codemirror/theme-one-dark
// 使用
import { oneDarkTheme } from "@codemirror/theme-one-dark";
const startState = EditorState.create({
    doc: jsonString,
    extensions: [basicSetup,oneDarkTheme, javascript(), json()],
  });
// 自定义主题
const  myTheme = EditorView.theme({
  "&": {
    color: "white",
    backgroundColor: "#034"
  },
  ".cm-content": {
    caretColor: "#0e9"
  },
  "&.cm-focused .cm-cursor": {
    borderLeftColor: "#0e9"
  },
  "&.cm-focused .cm-selectionBackground, ::selection": {
    backgroundColor: "#074"
  },
  ".cm-gutters": {
    backgroundColor: "#045",
    color: "#ddd",
    border: "none"
  }
}, {dark: true})
// 使用
  const startState = EditorState.create({
    doc: jsonString,
    extensions: [basicSetup,myTheme, javascript(), json()],
  });

const undateValue = ()=>{
  const value = editorView.value.state.doc.toString()
  if(value){
   // 具体逻辑根据自己业务场景做变化
    editorView.value.dispatch({changes: {from: 0, to:editorView.value.state.doc.length, insert: 'test'}})
  }
}