引入静态资源：

    <link rel="stylesheet" href="https://codemirror.net/lib/codemirror.css">
<#--https://codemirror.net/theme/-->
    <link rel="stylesheet" href="https://codemirror.net/theme/base16-light.css">

    <script src="https://codemirror.net/lib/codemirror.js"></script>
    <script src="https://codemirror.net/mode/javascript/javascript.js"></script>
    <script src="https://codemirror.net/addon/hint/show-hint.js"></script>
    <script src="https://codemirror.net/addon/hint/javascript-hint.js"></script>
    <link rel="stylesheet" href="https://codemirror.net/addon/hint/show-hint.css">

    <script src="https://codemirror.net/addon/selection/active-line.js"></script>
    <script src="https://codemirror.net/addon/edit/matchbrackets.js"></script>

    <link rel="stylesheet" href="https://codemirror.net/addon/fold/foldgutter.css"/>
    <script src="https://codemirror.net/addon/fold/foldcode.js"></script>
    <script src="https://codemirror.net/addon/fold/brace-fold.js"></script>
    <script src="https://codemirror.net/addon/fold/brace-fold.js"></script>
    <script src="http://ajax.aspnetcdn.com/ajax/jshint/r07/jshint.js"></script>
    <script src="https://codemirror.net/addon/lint/lint.js"></script>
    <script src="https://codemirror.net/addon/lint/javascript-lint.js"></script>
    <link rel="stylesheet" href="https://codemirror.net/addon/lint/lint.css">

js 代码实例：

/**
 * 用来实时对用户的输入进行提示
 */
function showCodeHint(editor) {
    editor.on("cursorActivity", function () {
        //获取用户当前的编辑器中的编写的代码
        var words = editor.getValue() + "";
        //利用正则取出用户输入的所有的英文的字母
        words = words.replace(/[a-z]+[\-|\']+[a-z]+/ig, '').match(/([a-z]+)/ig);
        //将获取到的用户的单词传入CodeMirror,并在javascript-hint中做匹配
        CodeMirror.ukeys = words;
        //调用显示提示
        editor.showHint();
    });
}



$(function () {
    appendNode(); // 初始化首节点
    renderFirstCodeArea();

    $('#add-node-btn').unbind().bind('click', () => {
        appendNode();
        renderLastCodeArea();
    });

    function appendNode() {
        let firstNodeHtml = getNodeHtml();
        $('#node-list').append(firstNodeHtml);
    }

    function renderFirstCodeArea() {
        let inputArray = $('[name="input"]');
        let inputEditor = CodeMirror.fromTextArea(inputArray[0], CodeMirrorOptions);
        showCodeHint(inputEditor);
        let inputBody = inputEditor.doc.getValue();

        let outputArray = $('[name="output"]');
        let outputEditor = CodeMirror.fromTextArea(outputArray[0], CodeMirrorOptions);
        showCodeHint(outputEditor);
        let outputBody = outputEditor.doc.getValue();
    }

    function renderLastCodeArea() {
        let inputArray = $('[name="input"]');
        let inputArrayLength = inputArray.length;
        let inputEditor = CodeMirror.fromTextArea(inputArray[inputArrayLength - 1], CodeMirrorOptions);
        showCodeHint(inputEditor);
        let inputBody = inputEditor.doc.getValue();

        let outputArray = $('[name="output"]');
        let outputArrayLength = outputArray.length;
        let editor = CodeMirror.fromTextArea(outputArray[outputArrayLength - 1], CodeMirrorOptions);
        showCodeHint(editor);
        let outputBody = editor.doc.getValue();
    }


    function getNodeHtml() {
        return `<div class="node">
            <form class="form">
                <div class="form-group row">
                    <label class="col-sm-2 col-form-label">节点名称</label>
                    <div class="col-sm-10">
                        <input name="name" type="text" class="form-control" placeholder="节点名称">
                    </div>
                </div>

                <div class="form-group row">
                    <label class="col-sm-2">输入脚本</label>
                    <div class="col-sm-10">
                        <textarea name="input" rows="10" class="form-control"></textarea>
                    </div>
                </div>

                <div class="form-group row">
                    <label class="col-sm-2">期望输出脚本</label>
                    <div class="col-sm-10">
                        <textarea name="output" class="form-control"></textarea>
                    </div>
                </div>

                <div class="form-group row">
                    <label class="col-sm-2">期望输出值</label>
                    <div class="col-sm-10">
                        <input name="actualOutput" class="form-control">
                    </div>
                </div>

                <div class="form-group row">
                    <label class="col-sm-2">断言算子</label>

                    <div class="col-sm-10">
                        <select name="operator" class="form-control">
                            <option value="equals" selected>EQ(equals)</option>
                            <option value="contains">CNT(contains)</option>
                            <option value="startWith">STW(startWith)</option>
                            <option value="endWith">EDW(endWith)</option>
                        </select>
                    </div>
                </div>

                <div class="form-group row">
                    <label class="col-sm-2 col-form-label"></label>
                    <div class="col-sm-10">
                        <button class="btn-sm btn-outline-primary">保存</button>
                    </div>
                </div>
            </form>
        </div>`;
    }


});

参考资料：

https://codemirror.net/doc/manual.html#config

CodeMirror实现MySql关键字的变色和自动提示：
https://blog.csdn.net/qq1142003960/article/details/45651097

Javascript codemirror 高级应用：
https://blog.csdn.net/kingrome2017/article/details/81626084