Can I select a .shp + .dbf + .shx file to upload?

[ahalota]

I'd like to offer my users to upload these 3 files instead of having to compress it into .zip first. Does the library currently already allow this?

The other solution I had in mind is to have them select all three, I zip them up on my end, and then proceed as usual.

[calvinmetcalf]

not with this library, but you can use shapefile-js to parse the shp and dbf seperatlly and combine them, with code like

shp.combine([shp.parseShp(shpFile), dbfFile]).then(function (geojson) {
  var layer =  L.geojson(geojson).addTo(map);
});

the shx file is not required, but if your shapefile is projected you need to have the .proj file and you can use it as such

shp.combine([shp.parseShp(shpFile, projFile), dbfFile]).then(function (geojson) {
  var layer =  L.geojson(geojson).addTo(map);
});