JSFiddle - React, Tailwind, and code Playground
by Riivr
HTML
<ul class="u-delist">
</ul>JavaScript
var notesString = "12/18/2018 10:12:10 AM:Donna Harthcock:This note has <br> a break and : a semicolon<br>";
var rgx = /(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[^A-Za-z0-9_ ])(?!.*\s).{6,}/g;
var regex = /<br>(?![0-9])/gi;
notesString = notesString.replace(regex, "");
console.log(notesString);