判断空object
Object.getOwnPropertyNames(obj).length === 0
模拟range
Array.apply(null, Array(5)).map(function (_, i) {return i;});=> [0, 1, 2, 3, 4] 被vue观察后的object或array不再是空的
Object.getOwnPropertyNames(emptyObservedObject) == ['__ob__']
本文共 282 字，大约阅读时间需要 1 分钟。
Object.getOwnPropertyNames(obj).length === 0
Array.apply(null, Array(5)).map(function (_, i) {return i;});=> [0, 1, 2, 3, 4] Object.getOwnPropertyNames(emptyObservedObject) == ['__ob__']
转载于:https://www.cnblogs.com/xiangnan/p/6876317.html