error when clicking the back button

Question

I want to take the value that contains the id in href and disappear parentElement from the back button and display the page with the id in href but when I click the error occurs and the href value is undifined
https://code.sololearn.com/WBq4P0ijmce2/?ref=app

Answer 1

i think line 74 just e.target?

Answer 2

ShortCode I wanted to retrieve the value of the href from the button that contained the id of a page but was indifined