我知道這可能是一個愚蠢的問題,但我是新來的JavaScript,所以將不勝感激一些指導。使用創建的對象調用另一個函數後,Javascript創建的對象屬性值未定義
我有以下notificationSocketEventHandler
對象創建:
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)
}
})
此事件處理程序被用來從插座 所以聽通知和設置這樣
$.globals.socket.on('notifications',notificationSocketEventHandler);
事件原型定義如下:
$.globals.socket = {
events: {},
on: function (attr, func) {
if (!attr) return false
this.events[attr] = this.events[attr] || [];
this.events[attr].push(func)
return true
},
remove(attr, func) {
if (!events[attr]) return false
this.events[attr].forEach(function (f, indx) {
if (f === func) {
events[attr].slice(indx, 1)
}
})
},
trigger: function (attr, thisArg, paramArgs) {
if (Array.isArray(attr) && attr.length) {
var obj = this.events[attr[0]]
for (var i = 1; i < attr.length; i++) {
if (!obj) return
obj = obj[attr[i]]
}
if (typeof obj == 'function') obj.apply(thisArg, paramArgs)
if (Array.isArray(obj)) {
obj.forEach(function (c) {
if (typeof c == 'function') c.apply(thisArg, paramArgs)
})
}
return
}
if(this.events[attr]){
console.log(this.events[attr])
this.events[attr].forEach(function (f) {
if (typeof f === 'function')
f.apply(thisArg, paramArgs)
})
}
}
}
我遇到的問題是,notificationSocketEventHandler
對象被傳遞到$.globals.socket.on
功能並最終後被推入事件對象,屬性中的notificationSocketEventHandler
如created
,destroyed
,loadedFromSocket
它被傳遞給$.globals.socket.on
功能之前被定義爲函數,在事件對象中突然變成'undefined',爲什麼?