* Returns if the given value contains an effective constraint. * @private

* Returns if the given value contains an effective constraint. * @private

* Check if the given variable is a function * @method * @memberof Popper.Utils * @argument {Any} functionToCheck - variable to check * @re

* Helper used to know if the given modifier is enabled. * @method * @memberof Popper.Utils * @returns {Boolean}

* Helper used to know if the given modifier depends from another one.<br /> * It checks if the needed modifier is listed and enabled. * @method

* Cross-window, cross-Node-context regular expression detection * @param {Object} object Anything * @return {Boolean} true if the object is a