I have created a web form and i faced issues that are listed below

i HAVE CREATED A WEB FORM
here i included sales invoice item as a table in my doctype
The doctype is created by me



when i select Item the item name is not fetched
when i enter quantity the and rate the amount is not calculated
How can i solve this

Auto-populate value of UOM, Amount, etc., work at the form level, not at the web form level. It’s difficult to manage on a web form. If you are familiar with web form scripting, you might be able to handle it. Web forms are suitable for smaller use cases, but when creating a web form for larger doctypes, issues like this can occur.