codemirror2 在antd的form中会出现无法录入或者录入报错的问题,解决方法请查阅:

codemirrorwrapper - CodeSandbox

1. 安装依赖

yarn add codemirror
yarn add react-codemirror2

2. 引入

// js
import Cm from "./extendCodeMirror.js";  // 代码在文章底部, 用于初始化编辑器的格式化代码的功能
import {UnControlled as CodeMirror} from 'react-codemirror2';
import 'codemirror/addon/fold/foldcode.js';  // 代码折叠
import 'codemirror/addon/fold/foldgutter.js'; // 代码折叠
import 'codemirror/addon/fold/brace-fold.js'; // 代码折叠
import 'codemirror/addon/fold/comment-fold.js'; // 代码折叠
import 'codemirror/addon/hint/javascript-hint.js'; // 自动提示
import 'codemirror/addon/hint/show-hint.js';   // 自动提示
import 'codemirror/addon/lint/lint.js';  // 错误校验
import 'codemirror/addon/lint/javascript-lint.js';  // js错误校验
import 'codemirror/addon/selection/active-line.js';  // 当前行高亮
import 'codemirror/lib/codemirror.js'
import 'codemirror/mode/javascript/javascript.js'
// css
import 'codemirror/addon/fold/foldgutter.css';  // 代码折叠
import 'codemirror/addon/hint/show-hint.css';  // 自动提示
import 'codemirror/addon/lint/lint.css'  // 代码错误提示
import 'codemirror/lib/codemirror.css' // 编辑器样式
import 'codemirror/theme/idea.css'  // 主题: idea
import 'codemirror/theme/solarized.css'
//声明JSHINT
const jshint = require('../../../libs/codeMirror/jshint'); // jshit.js 在文章底部
window.JSHINT = jshint.JSHINT;

3.使用

<CodeMirror
   editorDidMount={this.onEditorDidMount}
   value={''}
   options={{
   extraKeys: {                    //配置按键
     "Alt": "autocomplete",      // 按下`alt`时出现代码提示
   },
   lineNumbers: true,              // 显示行号
   lineWrapping: false,             // 自动换行
   styleActiveLine: true,          // 选中行高亮
   mode: "javascript",
   theme: "idea",                  // 主题配置
   matchBrackets: true,            // 匹配括号
   hintOptions: {hint: this.synonyms},  // 自动提示配置
   gutters: ["CodeMirror-lint-markers"],
   lint: true,                     // 代码出错提醒
   indentUnit: 4,                  // 缩进配置（默认为2）
 }}
/>
// js
onEditorDidMount = editor => {
   this.editor = editor;
   editor.setSize("width", 'height'); // 设置编辑器宽高
  // 绑定其他快捷键, 这里以按下ctrl-1 格式化编辑器代码做示例
   editor.addKeyMap({
       'Ctrl-1': this.autoFormatSelection,
   })
}

synonyms = (cm, option) => {
   let comp = [
       "要提示的代码1",
       "要提示的代码2",
       "..."
   ]
   return new Promise(function (accept) {
       setTimeout(function () {
           var cursor = cm.getCursor(), line = cm.getLine(cursor.line);
           var start = cursor.ch, end = cursor.ch;
           while (start && /[a-zA-Z0-9_.]/.test(line.charAt(start - 1))) --start;
           while (end < line.length && /[a-zA-Z0-9_.]/.test(line.charAt(end))) ++end;
           var word = line.slice(start, end);
           var result_comp = [];
           for (let i = 0; i < comp.length; i++) {
               if (comp[i].indexOf(word) !== -1) {
                   result_comp.push(comp[i]);
               }
           }
           if (result_comp.length) {
               return accept({
                   list: result_comp,
                   from: Cm.Pos(cursor.line, start),
                   to: Cm.Pos(cursor.line, end)
               });
           } else {
               return accept(null)
           }
       }, 50)
   })
}

autoFormatSelection = () => {
   const script_length = this.editor.getValue().length;
   const startPos = {line: 0, ch: 0, sticky: null};
   const endPos = this.editor.doc.posFromIndex(script_length);
   this.editor.setSelection(startPos, endPos);
   this.editor.autoFormatRange(startPos, endPos);
   this.editor.commentRange(false, startPos, endPos);
};

4.补充代码

// extendCodeMirror.js
/* eslint-disable */
import * as CodeMirror from 'codemirror';

CodeMirror.extendMode("css", {
commentStart: "/*",
commentEnd: "*/",
newlineAfterToken: function(type, content) {
  return /^[;{}]$/.test(content);
}
});

CodeMirror.extendMode("javascript", {
commentStart: "/*",
commentEnd: "*/",
// FIXME semicolons inside of for
newlineAfterToken: function(type, content, textAfter, state) {
  if (this.jsonMode) {
    return /^[\[,{]$/.test(content) || /^}/.test(textAfter);
  } else {
    if (content == ";" && state.lexical && state.lexical.type == ")") return false;
    return /^[;{}]$/.test(content) && !/^;/.test(textAfter);
  }
}
});

CodeMirror.extendMode("xml", {
commentStart: "<!--",
commentEnd: "-->",
newlineAfterToken: function(type, content, textAfter) {
  return type == "tag" && />$/.test(content) || /^</.test(textAfter);
}
});

// Comment/uncomment the specified range
CodeMirror.defineExtension("commentRange", function (isComment, from, to) {
var cm = this, curMode = CodeMirror.innerMode(cm.getMode(), cm.getTokenAt(from).state).mode;
cm.operation(function() {
  if (isComment) { // Comment range
    cm.replaceRange(curMode.commentEnd, to);
    cm.replaceRange(curMode.commentStart, from);
    if (from.line == to.line && from.ch == to.ch) // An empty comment inserted - put cursor inside
      cm.setCursor(from.line, from.ch + curMode.commentStart.length);
  } else { // Uncomment range
    var selText = cm.getRange(from, to);
    var startIndex = selText.indexOf(curMode.commentStart);
    var endIndex = selText.lastIndexOf(curMode.commentEnd);
    if (startIndex > -1 && endIndex > -1 && endIndex > startIndex) {
      // Take string till comment start
      selText = selText.substr(0, startIndex)
      // From comment start till comment end
        + selText.substring(startIndex + curMode.commentStart.length, endIndex)
      // From comment end till string end
        + selText.substr(endIndex + curMode.commentEnd.length);
    }
    cm.replaceRange(selText, from, to);
  }
});
});

// Applies automatic mode-aware indentation to the specified range
CodeMirror.defineExtension("autoIndentRange", function (from, to) {
var cmInstance = this;
this.operation(function () {
  for (var i = from.line; i <= to.line; i++) {
    cmInstance.indentLine(i, "smart");
  }
});
});

// Applies automatic formatting to the specified range
CodeMirror.defineExtension("autoFormatRange", function (from, to) {
var cm = this;
var outer = cm.getMode(), text = cm.getRange(from, to).split("\n");
var state = CodeMirror.copyState(outer, cm.getTokenAt(from).state);
var tabSize = cm.getOption("tabSize");

var out = "", lines = 0, atSol = from.ch == 0;
function newline() {
  out += "\n";
  atSol = true;
  ++lines;
}

for (var i = 0; i < text.length; ++i) {
  var stream = new CodeMirror.StringStream(text[i], tabSize);
  while (!stream.eol()) {
    var inner = CodeMirror.innerMode(outer, state);
    var style = outer.token(stream, state), cur = stream.current();
    stream.start = stream.pos;
    if (!atSol || /\S/.test(cur)) {
      out += cur;
      atSol = false;
    }
    if (!atSol && inner.mode.newlineAfterToken &&
        inner.mode.newlineAfterToken(style, cur, stream.string.slice(stream.pos) || text[i+1] || "", inner.state))
      newline();
  }
  if (!stream.pos && outer.blankLine) outer.blankLine(state);
  if (!atSol) newline();
}

cm.operation(function () {
  cm.replaceRange(out, from, to);
  for (var cur = from.line + 1, end = from.line + lines; cur <= end; ++cur)
    cm.indentLine(cur, "smart");
  cm.setSelection(from, cm.getCursor(false));
});
});
// console.log("初始化CodeMirror完成");
export default CodeMirror;

// jshint.js
//链接: https://pan.baidu.com/s/1mdTArljNyDybKOqKIL2XQQ 提取码: d2b2 复制这段内容后打开百度网盘手机App，操作更方便哦