Function isInstance

stackgl_modules/index.js:1517–1519

(obj, type)

// the `instanceof` check but they should be treated as of that type.
// See: https://github.com/feross/buffer/issues/166
function isInstance(obj, type) {
  return obj instanceof type || obj != null && obj.constructor != null && obj.constructor.name != null && obj.constructor.name === type.name;
}
function numberIsNaN(obj) {
  // For IE11 support
  return obj !== obj; // eslint-disable-line no-self-compare