There is not really an easy way to crop a featureCollection (or other geometry type) to a polygon or bbox.

There are times when I just want to do:

const newFC = turf.crop(oldFC, [xmin, ymin, xmax, ymax])

or

const newFC = turf.crop(oldFC, cropPolygon)

It's relatively easy to use intersect to crop Polygons, and booleanPointInPolygon to filter out Points, but I'm not even sure if there's a straightforward way to crop LineStrings currently.