How to use pop in this code(I am making keyboard).

Question

Plz tell the code to clear 1element or word from backward on clicking clear button
https://code.sololearn.com/WIwY5udoCePg/?ref=app

Answer 1

is this what you wanted?
https://code.sololearn.com/W6rC5k0qw2o9/?ref=app

Answer 2

this may be helpful
https://code.sololearn.com/WyB7cx5l10Ls/?ref=app