javascript-exercises | JavaScript exercises are intended to complement | Runtime Evironment library

You need to install jest globally:

In your onFileChangeHandler function you are setting the file to the selectedFile state and then immediately access it again like

In modern environments, you can use BigInt:

I broke it down into 3 steps.

1. Compute numChunks, how many chunks you need? E.g. if you have an array of 103 elements and a max size of 10, then you'll need 11 chunks.
2. Compute minChunkSize, the size of the smaller chunks. E.g. in the above example, the first 7 chunks will have 10 elements, while the other 3 chunks will have 11 elements (710 + 311 = 103).
3. Compute numSmallChunks, how many small chunks you can have. E.g. 3 in the above example.

Then you just splice the arr accordingly.

new Date() is a date. You assign it to var today which implicitly sets the type of the variable to Date.

mm+'-'+dd+'-'+yyyy is a string. You try to assign it to today which is a Date. It isn't a Date, so you get an error. You can't change the type of a variable (unless you declare it to expressly allow multiple types in the first place)

Use a different variable name to store your string in.

(And the same goes for the other variables where you do similar things)