Check whether a given font has the OpenType small caps feature "smcp" enabled

small-caps.js

var path = process.argv[2];

if (!path) {
  throw 'Whoops! We need a font path to check: `node small-caps.js [path_to_font]`';
}

var fontkit = require('fontkit');
var font = fontkit.openSync(path);
var hasSmallCaps = font.availableFeatures.indexOf('smcp') > -1;

console.log(hasSmallCaps ? 'Yes, this font has small caps.' : 'No, this font does not have small caps.');

console.log('numGlyphs: ', font.numGlyphs);
console.log('characterSet: ', font.characterSet[0] + ', ' + font.characterSet[font.characterSet.length - 1]);
console.log('availableFeatures: ', font.availableFeatures.join(', '));