Notepad that runs on your browser.
data:text/html,<html><head><title>memo</title><script>window.addEventListener('beforeunload',event=>{event.preventDefault();event.returnValue=''})</script></head><body style="margin:0;"><textarea autofocus placeholder="hello world" style="width:100%;height:100%;font-size:2em;padding:0.5em;" oninput="document.title=this.value||'memo'"></textarea></body></html>
<html>
<head>
<title>memo</title>
<script>
window.addEventListener('beforeunload', (event) => {
event.preventDefault();
event.returnValue = '';
})
</script>
</head>
<body style="margin:0;">
<textarea
autofocus
placeholder="hello world"
style="width:100%;height:100%;font-size:2em;padding:0.5em;"
oninput="document.title=this.value||'memo'"
></textarea>
</body>
</html>
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