SheetJS was created because of a Microsoft licensing issue with a library (https://github.com/stephen-hardy/xlsx.js/issues/8). The other project had a nonstandard license with a clause that only applied to browsers run on Microsoft Windows, which is really bizarre for a JS library that can run on any browser. Apparently the original developer was working for Microsoft at the time, and Microsoft mandated the license clause.
In a funny twist of fate, Microsoft now uses SheetJS open source to power some Excel exports in Office 365! https://tasks.office.com/License.html is the license disclosure, and you can actually see it in action in the exported files.
We were blown away when we found out. It's the ultimate endorsement! Oftentimes we just wonder what would have happened if Microsoft just let the original project adopt a standard open source license.
In a funny twist of fate, Microsoft now uses SheetJS open source to power some Excel exports in Office 365! https://tasks.office.com/License.html is the license disclosure, and you can actually see it in action in the exported files.
We were blown away when we found out. It's the ultimate endorsement! Oftentimes we just wonder what would have happened if Microsoft just let the original project adopt a standard open source license.