How to improve in programming, solving small problems like a calculator?

Question

IT education

I am a beginner web developer, I have some experience in small and medium projects. Interested in the frontend for the most part and I asked myself the following question.
When I studied layout, everything was clear what was going on and how to learn it. There is a layout - layout.
But programming is a little different.
For example, there is a task to make a calculator and there are tools besides native JS (Jquery and I like Vue).
The biggest temptation is to go and google the solution of a SMART PERSON, but on the other hand it seems that you need to do it yourself and make your own bike.
In your professional opinion, what is the best way to do such practical tasks for more PROFIT?
Look for a solution and do it in your own way, using ready-made logic, or try to code the solution yourself?

Answer 1

From the point of view of speed and "you need it yesterday" - you need to be able to integrate a ready-made solution into the project. And from the point of view of PROFIT, take a ready-made solution, figure out how it works (analyze the sufficiency / redundancy of the code) and make it even better - by optimizing and adding the necessary functionality (something is always missing)

Answer 2

I’m also a beginner, well, I’ve been learning js for half a year, sometimes it’s difficult from the ceiling, for now I use other people’s solutions and optimize, there’s no other way, I’m not a genius)

Answer 3

https://www.codewars.com
Try to solve it here. There are tasks of different levels of difficulty.