Function isFunction

app/src/static/js/react-bootstrap.js:3064–3067

* Check if the given variable is a function * @method * @memberof Popper.Utils * @argument {Any} functionToCheck - variable to check * @returns {Boolean} answer to: is a function?

(functionToCheck)

 */

function isFunction(functionToCheck) {
  var getType = {};
  return functionToCheck && getType.toString.call(functionToCheck) === '[object Function]';
}
/**
 * Get CSS computed property of the given element
 * @method