我正在尝试使用if语句和or ||运算符来测试房间类型的选择框选项的值是单个King，单个Double Queen还是单个两个twins，然后执行一些代码。我一直收到消息＆＃34;未被发现的语法错误未识别的令牌||＆＃34;在哪里||运算符在if语句中。
var hotel = {
name:"Benson hotel",
rooms:500,
jsuites:10,
ssuites:10,
booked:100,
checkAvailability: function(){
return this.rooms - this.booked;
}
};
hotel.name = "Bonton";
var elName = document.getElementById("hotelN");
elName.textContent = hotel.name;
function checkin(){
var nRooms = document.getElementById("numRooms").value * 1;
var tRoom = document.getElementById("typeRoom");
if (tRoom.value = "singleK")||(tRoom.value ="singleQ")||(tRoom.value = "singleT") { //*I am getting the following message about above line of code in the console. "uncaught syntax error unidentified token ||" Obviously the above if statement with || operator is not correct//
hotel.booked = numRooms + hotel.booked;
if hotel.checkAvailability() < 0 {
var rAvail = nRooms + (hotel.checkAvailability());
if rAvail <= 0 {
var noSay = document.getElementById("say");
noSay.textContent = "We have no rooms available";
}
else {
var yesSay = document.getElementById("say");
yesSay.textContent = "We have" + rAvail + "rooms available";
}
}<body>
<div id="wrapper">
<div id="heading">
<h1 id="hotelN"></h1>
/div>
<div id="main">
<form id="myForm">
<fieldset>
<legend>Book a Room</legend><p>
<label for="rm1">Number of Rooms:</label>
<input type="number" max="10" min="1" value="1"name="rm" id="numRooms">
Type of room: <select type="text" maxlength="14" id="typeRoom">
<option value="singleK">Single King Bed</option>
<option value="singleQ">Single Queen Bed</option>
<option value="singleT">Single Two Twins</option>
<option value="jsuite">Junior One Bedroom Suite</option>
<option value="srsuite">Senior Two Bedroom Suite</option>
</select></p>
Occupancy:<select type="text">
<option>One adult</option>
<option>Two adults</option>
<option>One adult and Child</option>
</select>
Check In Date: <input type="date"name="checkin" id="cInDate">
Check Out Date: <input type="date" name="checkout" id="cOutDate">
<button type="button" onclick="checkin()">Submit</button>
</fieldset>
</form>
<H1 class="al">Hotel Room Availability</H1>
<p class="al" ><span id="say"></span> and check out on July <span id="dateOut"></span></p>
<p id="first">jjjj</p>
<p id="second"></p>
</div>
</div>
答案 0 :(得分：4)
您只需要添加一对括号：
if ((tRoom.value == "singleK")||(tRoom.value =="singleQ")||(tRoom.value == "singleT")){
...
}
或者
if (tRoom.value == "singleK"||tRoom.value =="singleQ"||tRoom.value == "singleT"){
...
}
答案 1 :(得分：0)
if语句的整个条件部分必须用括号括起来。通过执行if (condition1) || (condition2)，您可以在||之前终止条件。
它会是这样的：
if ((condition1) || (condition2))
此外：您正在寻找的条件运算符是==，而不是=。 ==用于比较两个值，而=用于设置。
答案 2 :(得分：0)
if (tRoom.value = "singleK")||(tRoom.value ="singleQ")||(tRoom.value = "singleT") {
您无法在if()
||
if (tRoom.value = "singleK" || tRoom.value ="singleQ" || tRoom.value = "singleT") {
答案 3 :(得分：0)
该行至少有2个问题：
您的主要问题是您在整个条件下错过了一组括号：
if ((tRoom.value = "singleK") || ...) {
现在你的or-operator只是浮动的。
===进行比较。 =用于分配。