javascript - 方法Object()里面传参数和不传参数有什么区别？

问题描述

比如这里target = Object(target)和target = Object()或者target = new Object()有什么区别？

if (typeof Object.assign != ’function’) { Object.assign = function(target) { ’use strict’; if (target == null) { throw new TypeError(’Cannot convert undefined or null to object’); } target = Object(target); for (var index = 1; index < arguments.length; index++) { var source = arguments[index]; if (source != null) {for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; }} } } return target; };}

问题解答

你不给参数的话他就是个空对象。。。

https://developer.mozilla.org...这篇文章讲得很清楚