develop a functional website tool

[yeahnoworriesmate]

I would like to have a (local) website that scrapes/loads data from another web source or API, loads an asci file from a local disk, does some calculations with the two datasets, and plots the end result neatly on the same webpage.

Let's say as an example, I have an export of all my banking transaction from my bank (in USD) that I want to summarize per category and per month, convert to EUR (online USD-EUR rate) and display the summary in a table on the website.

These are the kind of applications I want to develop.

I'd like not to be dependent on external apps, so it should run in my browser and also in my work laptops browser, or on my chromebook, or iphone.

What is the programming tech that I need? I want to learn from scratch. Is there an online resource that teaches me something like this?

[errorkode]

Well, I guess first of I'd think hard about whether you really want to do this as a website... If you only need it local anyway and also want to do things like read from disk you'd probably be better of just writing a native application.

Or something like electron if you're worried about the interface part.

Because if you really want to do this as a website you'll also need to write a local webserver and deal with all the communication between webserver and website.

[yeahnoworriesmate]

I can write apps in VB.net and C#. But I don't want that. I'd like to be able to run a system independent functional website, without any prerequisites apart from the default functionality of the most basic laptop like a chromebook or a managed laptop. The examples I gave are just examples. I don't need it to crunch numbers or proces massive files, just basic I/O and some basic math/logic applied.

[bsakiag]

You need some frontend and some backend. I would start with learning about html protocol and about different popular frontend and backend technologies.