How to prevent xss injection from UEditor

Today"s rich text editors all have xss injection vulnerabilities. I would like to know how to prevent xss injection? The markdown editor ignores

Rich-text-editor xss
Mar.03,2021

try this htmlpurifier

you need this awesome XSS Filter module: http://jsxss.com/zh/index.html
online demo: http://jsxss.com/zh/try.html

.

simple usage:

introduce the file http://rawgit.com/leizongmin/js-xss/master/dist/xss.js

into the page 
<h1></h1>
<script>alert('sadas')</scrtip>

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bf9e85-31511.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf9e85-31511.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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