Validating Combined Max File Size

[kmarler18]

@MrKampla @Jaaneek @Forsect

Thanks for all your help guys!

I'm trying to create a custom validator that limits the total file size of all files. I'm using the useImperativeFilePicker hook. For example, suppose a user selects a 50MB file, then after their initial selection they go back to the picker and select another 50MB file. I want to be able to calculate the total file size from the 2 files despite them being in different selections. I read the documentation about creating custom validation, but in the validateBeforeParsing method the plainFiles argument only contains data for the current selection and not the existing files. Wondering if you have any tips to get it up and running? Thanks