1. <p>hello<img src=x onerror='alert(document.cookie)'></p>
2. <p>111</p><pre class=" prettyprint" codeName="">\n<iframe src-"https://www.baidu.com"></iframe>\n\n</pre>
3. <p>111</p><pre class=" prettyprint" codeName="">\n<script>alert('hello')</script>\n</pre>
