turf.buffer creates Polygons with clockwise vertices.

[devdattaT]

I'm using the CDN version of turf in my browser, and creating buffers for User provided points, and saving them in the db; I realized that the geojson created was not conforming to the GeoJSON standard, (section 3.16) specifically, which states that

A linear ring MUST follow the right-hand rule with respect to the area it bounds, i.e., exterior rings are counterclockwise, and holes are clockwise.

This can be replicated by running the following code:

var pt=turf.point([73,20]);
var buff=turf.buffer(pt, 2000, 'meters');
console.log(JSON.stringify(buff));

And then testing the output with http://geojsonlint.com/