When I click on any button it is disappearing

Question

https://code.sololearn.com/WRFIg8ss5knN/?ref=app

Answer 1

the button inside form fire a submit event. its like whe you're clicking on login button then the page change.

you can remove the form. but keep the input button

or add this to your js

window.onload = ()=>{document.querySelector("#calc").onsubmit = (e)=>{e.preventDefault();}}

Answer 2

Tq bro it's working