src="data:text/html;charset=utf-8,'+escape(data)+'"
$('.wrapper-'+label).empty().append('<iframe scrolling="no" style="border:none;" src="data:text/html;charset=utf-8,'+escape(data)+'"></iframe>')
Python
import urllib.parse
html = "html code"
html = urllib.parse.quote(html)
print(f'<iframe widht="100%" height="400px" src="data:text/html;charset=utf-8,{html}></iframe>"')