I would suggest beginners to go with React, as it has lot of tutorials and resources to learn. And with that you can learn React Native as well which is used for hybrid mobile development.

I saw that export syntax and it's really useful, Thanks. I will try with those.

CardNew is a component which I already defined above that as you said. And I will try with the other option you gave. Thanks.

I solved it by pressing enter button for the options that do not hold download button with it. Not a single instruction was there for pressing "Enter" button :(

In the first picture stars is initialized and declared as "North Star" with let keyword. So with let keyword we can change the variable value whenever we want. So inside the "myNightSky" function you are changing the value of stars to "Sirius" as it is accessible to that function and it's affected globally as well. In second picture, the stars variable which you initialized and declared as "Sirius" inside the "myNightSky" function is completely engaged to the function itself, It is not accessible outside that function i.e the scope is done and dusted for "myNightSky" function and for "myNightSky" function stars means "Sirius". So that's why you see those result variation.

Thank you, I will look into those.

Nope, its actually a screenshot of another person's window :)

React can work with jQuery but it is not best practice I suppose.

Thank you Gautham Ramachandran :)

Check this https://github.com/innoveit/react-native-ble-manager node package, It has the things you need, It can enable bluetooth, read data from bluetooth and write over it.