I have just started working on react-spring. From the very beginning, I have seen the usage of '''<animated>''' tag. As, I explored more and complexity increases, I find more and more details of the code which I do not fully understand.
For example, Just have a look at this sandbox- https://codesandbox.io/s/stupefied-noether-8i6o0
I am still not clear how the key variable passed to animated tag is working under the hood. Moreover, is there is an exhaustive list on which parameters can I pass to animated tag?
Also, is there any good tutorials/resources to understand react-spring in detail? The official document though is quite helpful, doesn't provide enough resolution on micro details of each aspect of it's function.
The key prop is not directly related to react-spring, in your example you can see that string which is an array uses the map() function to map and render animated divs.
key is used by React in order to be able to track those elements between changes and be able to determine whether the virtual DOM needs to generate those elements again as a whole or only the new ones that are added. More about keys and lists can be found here.
For more info about react-spring you might find some more information here, if you have something specific you would like to achieve feel free to make a question about it, playing with the library and experiencing it yourself will probably be the best way to learn about it.