If you want more informations you could check the SheetJS documentation and there is a more detailed example here : How to read an excel file contents on client side? Like this 'A1:J215' from it you could get the amount of lines or the char of the last column. '!ref' is more interesting as it contains the plage of cells containing data wich is a string '!margin' refers to cells margins so it may not represent any interest. This array also have two more entries with those keys '!margin' and '!ref': The content of a sheet accessed this way is a single dimension object array wich contains all the cells of the sheet starting from the first cell of the header to the last cell wich contains data.Įach of those cells has a key like this 'A1', 'B250', 'J3'
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