如何在CodeMirror中模拟按键点击？

<link rel="stylesheet" href="codemirror.css">
<script src="codemirror.js"></script>

var editor = CodeMirror(document.body, {
  value: "function myFunction() {\n\tconsole.log('Hello, world!');\n}",
  mode: "javascript"
});

var keyEvent = new KeyboardEvent("keydown", {
  key: "Enter",
  keyCode: 13,
  which: 13,
  bubbles: true
});
editor.getInputField().dispatchEvent(keyEvent);