101/instance-of.js

common javascript utils that can be required selectively that assume es5+

/**
 * @module 101/instance-of
 */

/**
 * Functional version of JavaScript's instanceof, returns a
 * partial function which expects a value argument and returns
 * true if the value is an instance of the Class (false if not).
 * @function module:101/instance-of
 * @param {function} Class - Class of which the value should be
 * @return {function} Partial-function instanceOfClass (which accepts any value and returns if the value is an instance of the specified class)
 */

// (function)(val)
module.exports = instanceOf;

function instanceOf (Class) {
  return function (val) {
    return val instanceof Class;
  };
}