npm / filesize

filesize

What changed in filesize 4 to 11, from its official release notes, upgrade guides and advisories. Sources checked 2026-11-14.

4 breaking1 security9 fixes and other

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filesize 1113 changes

Precision is now applied before rounding for decimal units, changing the resulting formatted values.
11.0.31release notes
Invalid rounding methods are now rejected.
11.0.30release notes
Precision values are formatted with the default locale.
11.0.29release notes

Input validation and edge-case handling in filesize() were hardened.
11.0.24release notes

Accepts uppercase spellings of the standard option.
11.0.32release notes
Locale formatting is now applied when precision is set.
11.0.28release notes
Small values and custom separators are kept free of scientific notation.
11.0.27release notes
Locale and separator options are now honored when formatting zero values.
11.0.26release notes
Preserves BigInt precision above Number.MAX_SAFE_INTEGER.
11.0.25release notes
Keeps precision trailing zeros for negative values.
11.0.23release notes
Keeps the plural fullform name when using a comma decimal separator.
11.0.22release notes
The output 'exponent' now returns the final exponent.
11.0.21release notes
The pad option is now honored for zero values.
11.0.21release notes

The deprecated suffixes option was removed in this major release.
4.0.0release notes