lml-main/packages/cosmo-ui-build/node_modules/tcomb/lib/is.js

This is now a mono repository published into many standalone packages.

var isType = require('./isType');

// returns true if x is an instance of type
module.exports = function is(x, type) {
  if (isType(type)) {
    return type.is(x);
  }
  return x instanceof type; // type should be a class constructor
};