is-boolean.js 269 Bytes Raw Blame History Permalink 1 2 3 4 5 6 7 8 9 10 "use strict"; var objToString = Object.prototype.toString, id = objToString.call(true); module.exports = function (value) { return ( typeof value === "boolean" || (typeof value === "object" && (value instanceof Boolean || objToString.call(value) === id)) ); };