Why won’t the append child function work?

Question

https://code.sololearn.com/WkLn8EVZJIpC/?ref=app
I’m trying to create a text node and append it to an existing p element

Answer 1

sololearn does not wait for your dom to load before executing your JavaScript code.
always wrap your code in a window.onload
https://code.sololearn.com/WW718N5J2H7X/?ref=app