Through which function to check if the WordPress main editor is full?

Question

WordPress

Tell me please.
I've been racking my brains for several hours (mainly my keyboard and Google)
How to make a check for filling in the WordPress main editor?
No matter what, you need:
if (filled) {
}
if(not filled){}

Answer 1

Editor-in-chief is content??
If yes, then you can

if (!empty(get_the_content())){
Заполнено
} else {
Не заполнено
}