ut2/es/isPlainObject.js

一个现代 JavaScript 实用工具库。[点击查看在线文档]。

import getTag from './internals/getTag.js';
import { functionProtoToString, objectTag, objectProtoHasOwnProperty, objectGetPrototypeOf } from './internals/native.js';
import isObjectLike from './isObjectLike.js';

var objectCtorString = functionProtoToString.call(Object);
function isPlainObject(value) {
    if (!isObjectLike(value) || getTag(value) !== objectTag) {
        return false;
    }
    var proto = objectGetPrototypeOf(Object(value));
    if (proto === null) {
        return true;
    }
    var Ctor = objectProtoHasOwnProperty.call(proto, 'constructor') && proto.constructor;
    return typeof Ctor === 'function' && Ctor instanceof Ctor && functionProtoToString.call(Ctor) === objectCtorString;
}

export { isPlainObject as default };