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<script>
const newFn = function (C, ...args) {
/**
* 创建对象,将其__proto__关联到构造器的prototype
* 设置原型
* 判断返回值
* 输出
* */
// const obj = Object.create(C.prototype);
/* 等价于 */
const obj = {
__proto__: C.prototype,
};
const instance = C.apply(obj, args);
if (instance && (typeof(instance) === 'object' || typeof(instance) === 'Function')) {
return instance;
}
return obj;
};
function Person(name) {
this.name = name;
}
Person.prototype.logName = function () {
console.log(this.name);
};
const o = newFn(Person, '任先阳');
o.logName();
</script>