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Five critical edge cases developers must test in browser-to-spreadsheet export tools

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Browser table exporters can silently corrupt data through precision loss, misaligned columns, or formula injection even when a file downloads without errors. Key risks include leading zeros being stripped from identifiers, long digit strings losing precision, and spreadsheet formulas being inadvertently executed from cell content. Merged table headers with rowspan or colspan attributes can shift values under incorrect column headings if not handled explicitly. CSV exports require careful quoting and escaping, but quoting alone does not guarantee a consumer application treats fields as plain text. Developers should also account for incomplete data capture when tables are paginated or virtualized, and validate exports by opening generated files in the actual spreadsheet applications end users rely on.

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