首页 \ 问答 \ JavaScript初学者：为什么这不起作用？(JavaScript beginner: why does this not work?)

JavaScript初学者：为什么这不起作用？(JavaScript beginner: why does this not work?)

 我的html页面没有响应我在JS中编写的这段代码，我是一个初学者，刚开始学习JS，有人可以告诉我为什么这不起作用？  
 
 
  
  /* this is a practice file that'll play with js
nothing strange to look at here folks! */

var firstName = 'Steven';
var lastName = 'Curry';
var fullName = firstName + ' ' + lastName;

function Hotel(HotelName){
	this.HotelName = HotelName;
	this.numRooms = 20;
	this.numGuests;
	this.checkAvailability {
		if(numRooms != 20 ){
			return true;
		}
		else{
			return false;
		}
	}
	this.getHotelName = function(){
		//can it work with this dot operator?
		return this.HotelName;
	}
}

var HiltonHotel = new Hotel('Hilton');
var hName = document.getElementById('hotelName');
hName.textContent = getHotelName();

var el = document.getElementById('name');
el.textContent = fullName; 
  <!DOCTYPE html>
<html>
<body>
	<div id = 'greeting'> Hello
		<span id="name">friend</span>!
		<h1>Welcome To the <span id = 'hotelName'>Hyatt</span>
	</div>
	<script 
	src = "https://stacksnippets.net/js">
	</script>
</body>
</html 
  
 
 
 我很确定它的排序和我的语法我需要继续工作，非常感谢任何建议，谢谢！ 

My html page is not responding to this code I wrote in JS, i'm a total beginner, and just started learning JS, can somebody tell me why this doesn't work? 
 
 
  
  /* this is a practice file that'll play with js
nothing strange to look at here folks! */

var firstName = 'Steven';
var lastName = 'Curry';
var fullName = firstName + ' ' + lastName;

function Hotel(HotelName){
	this.HotelName = HotelName;
	this.numRooms = 20;
	this.numGuests;
	this.checkAvailability {
		if(numRooms != 20 ){
			return true;
		}
		else{
			return false;
		}
	}
	this.getHotelName = function(){
		//can it work with this dot operator?
		return this.HotelName;
	}
}

var HiltonHotel = new Hotel('Hilton');
var hName = document.getElementById('hotelName');
hName.textContent = getHotelName();

var el = document.getElementById('name');
el.textContent = fullName; 
  <!DOCTYPE html>
<html>
<body>
	<div id = 'greeting'> Hello
		<span id="name">friend</span>!
		<h1>Welcome To the <span id = 'hotelName'>Hyatt</span>
	</div>
	<script 
	src = "https://stacksnippets.net/js">
	</script>
</body>
</html 
  
 
 
I'm pretty sure it's ordering and my syntax i need to work on, any advice is greatly appreciated thank you!

原文：https://stackoverflow.com/questions/44790585

更新时间：2021-04-27 11:04

最满意答案

 您应该为CartViewModel所有CartItemViewModel实例处理PropertyChanged事件。 您收到PropertyChangedEventArgs ，其中有一个名为PropertyName的成员。 当它的值为“ Raispropertychanged(TotalValue) ”时，您可以调用Raispropertychanged(TotalValue) 。 代码完全添加到CartViewModel 。 

You should handle the PropertyChanged event for all the instances of CartItemViewModel inside the CartViewModel. You receive PropertyChangedEventArgs which has a member called PropertyName. When its value is "SubTotal" then you can call Raispropertychanged(TotalValue). The code is completely added to CartViewModel.

JavaScript初学者：为什么这不起作用？(JavaScript beginner: why does this not work?)

最满意答案

相关问答

MvvmCross命令模式(MvvmCross Command Pattern)[2021-07-18]

Mvvmcross片段(Mvvmcross fragments)[2022-05-12]

MvvmCross绑定的变化(Changes in MvvmCross bindings)[2022-07-13]

可以在MvvmCross中执行(CanExecute in MvvmCross)[2021-10-29]

Mvvmcross中的RaisePropertyChanaged从一个类到另一个类(RaisePropertyChanaged in Mvvmcross from one class to another class)[2024-01-13]

MvxBindingAvtivityView在MvvmCross中的位置(Location of MvxBindingAvtivityView in MvvmCross)[2023-08-09]

在MvvmCross中使用MvxGridView(Using MvxGridView in MvvmCross)[2021-09-21]

SideMenu for mvvmCross(SideMenu for mvvmCross)[2022-06-01]

ActionBarSherlock与最新的MVVMCross(ActionBarSherlock with latest MVVMCross)[2022-01-07]

MVVMCROSS ShowViewModel-Navigation Inherited Class(MVVMCROSS ShowViewModel-Navigation Inherited Class)[2022-04-07]

相关文章

最新问答