How to delete html elements with javascript?

Question

Sorry if I sound like a noob, which I am I have just started learning web development on my own and currently going through basics of javascript,
So I wanted to create a simple web app that receives items to add to the list with a delete button to delete it off, also a function that would strike a line through when clicked on a specific list item.
I am kinda struggling with the delete and the strike through function, can get it to work on all the list items and in the delete function, I simply can't link it to any list item.
Posting here and hoping for someone kind enough to help a buddy out
Thanks!
Here's the code: https://code.sololearn.com/WC7M1CAR0vB1/#

Answer 1

Thankyou mate, that's so cool!

Answer 2

Hey Biraj, i have 2 questions, what is "window.onload".
2. is "this" a reserved keyword used in javascript?
and when i add an item to the list, the strikethrough functionality doesn't work, any help?

Answer 3

Thankyou so much again!
and could you tell me where'd you learn it from or maybe recommend me some resource, I'm currently taking a course on Udemy.