我知道这可能是一个愚蠢的问题,但我是新来的JavaScript,所以将不胜感激一些指导。使用创建的对象调用另一个函数后,Javascript创建的对象属性值未定义
我有以下notificationSocketEventHandler
对象创建:
const notificationSocketEventHandler = Object.create(socketHandlerProto, {
validators: {
created: [],
destroyed: [],
loadedFromSocket: [],
updated: [],
addedto: {
relation: []
},
removedfrom: {
}
},
created: function (data) {
if (this.validateProfileData(data, validators.created)) {} else {}
},
destroyed: function (data) {},
updated: function (data) {},
loadedFromSocket: function (data) {
console.log('Loaded from socket')
console.log(data)
}
})
此事件处理程序被用来从插座 所以听通知和设置这样
$.globals.socket.on('notifications',notificationSocketEventHandler);
事件原型定义如下:
$.globals.socket = {
events: {},
on: function (attr, func) {
if (!attr) return false
this.events[attr] = this.events[attr] || [];
this.events[attr].push(func)
return true
},
remove(attr, func) {
if (!events[attr]) return false
this.events[attr].forEach(function (f, indx) {
if (f === func) {
events[attr].slice(indx, 1)
}
})
},
trigger: function (attr, thisArg, paramArgs) {
if (Array.isArray(attr) && attr.length) {
var obj = this.events[attr[0]]
for (var i = 1; i < attr.length; i++) {
if (!obj) return
obj = obj[attr[i]]
}
if (typeof obj == 'function') obj.apply(thisArg, paramArgs)
if (Array.isArray(obj)) {
obj.forEach(function (c) {
if (typeof c == 'function') c.apply(thisArg, paramArgs)
})
}
return
}
if(this.events[attr]){
console.log(this.events[attr])
this.events[attr].forEach(function (f) {
if (typeof f === 'function')
f.apply(thisArg, paramArgs)
})
}
}
}
我遇到的问题是,notificationSocketEventHandler
对象被传递到$.globals.socket.on
功能并最终后被推入事件对象,属性中的notificationSocketEventHandler
如created
,destroyed
,loadedFromSocket
它被传递给$.globals.socket.on
功能之前被定义为函数,在事件对象中突然变成'undefined',为什么?