/* Prior art: this utility was created for https://github.com/11ty/eleventy/issues/2214 * Inspired by implementations from `is-what`, `typechecker`, `jQuery`, and `lodash` * `is-what` * More reading at https://www.npmjs.com/package/is-what#user-content-isplainobject-vs-isanyobject * if (Object.prototype.toString.call(value).slice(8, -1) !== 'Object') return false; * return value.constructor === Object && Object.getPrototypeOf(value) === Object.prototype; * `typechecker` * return value !== null && typeof value === 'object' && value.__proto__ === Object.prototype; * Notably jQuery and lodash have very similar implementations. * For later, remember the `value === Object(value)` trick */ module.exports = function (value) { if (value === null || typeof value !== "object") { return false; } let proto = Object.getPrototypeOf(value); return !proto || proto === Object.prototype; };