Этот фрагмент - то, что, я думаю, вы ищете.Я сделал еще одну функцию под названием getPrice, которая будет рассчитывать цену для вас.Он проверяет стиль рубашки, а затем, следуя приведенным вами примерам, проверяет, какой размер, и затем дает цену, или «Недоступно», если на складе их нет.
<!DOCTYPE html>
<html lang="en-US">
<head>
<title>JavaScript Project T-Shirt Order</title>
<script>
/*
* Function OrderTShirt
*
* Inputs:
* selectedColor - initialized from the select tag with id="colorChoice"
* selectedStyle - initialized from the select tag with id="style"
* selectedSize - initialized from the select tag with id="size"
*
* Output:
* alert of the order message
*
*/
function OrderTShirt(){
//initialize the input
var selectedColor = document.getElementById("colorChoice").value;
var selectedStyle = document.getElementById("style").value;
var selectedSize = document.getElementById("size").value;
//create the orderMessage to alert - you may want to move/change this code
var orderMessage = "Your order is: Color = " + selectedColor
+ "; Style = " + selectedStyle
+ "; Size = " + selectedSize+"\n";
//Add code to calculate the price and concatenate it to the orderMessage
var price = getPrice(selectedColor, selectedStyle, selectedSize);
if(price === "Unavailable") {
orderMessage += "This shirt is not available";
} else {
orderMessage += "Price = " + price;
}
//For example, "The order is: Color = gray; Style=T-Shirt; Size = XL \nThe price is $7"
//If the style and size are not available, then concatenate the message that
// the selection is not available instead of a price.
// a t-shirt in any size is $7 except 2XL which is $10.
// a v-neck in adult sizes is $12.50 except the 2XL is not available
// a tech shirt in adult sizes is $13
alert(orderMessage);
}
function getPrice(color, style, size) {
var price;
if(style === "T-Shirt") {
if(size === "2XL") {
price = 10;
}else {
price = 7;
}
}
else if(style === "Ladies V-Neck") {
if(size === "2XL") {
// Unavailable
price = "Unavailable"
}else {
price = 12.50;
}
}
else if(style === "Tech Shirt") {
price = 13;
}
return price;
}
</script>
</head>
<body>
<table>
<tr>
<th>Colors</th>
<th>Styles</th>
<th>Sizes</th>
</tr>
<tr>
<td>
<select id="colorChoice">
<option value="gray">Gray</option>
<option value="gold">Gold</option>
<option value="red">Red</option>
<option value="pink">Pink</option>
<option value="white">White</option>
<option value="navy">Navy</option>
<option value="maroon">Maroon</option>
<option value="black">Black</option>
<option value="royalblue">Royal Blue</option>
<option value="limegreen">Lime Green</option>
</select>
</td>
<td>
<select id="style">
<option value="T-Shirt">T-Shirt</option>
<option value="Tech Shirt">Moisture Wicking Tech Shirt</option>
<option value="Ladies V-Neck">Ladies V-Neck - Adult sizes only</option>
</select>
</td>
<td>
<select id="size">
<option value="XS">Adult Extra Small</option>
<option value="S">Adult Small</option>
<option value="M">Adult Medium</option>
<option value="L">Adult Large</option>
<option value="XL">Adult Extra Large</option>
<option value="2XL">Adult 2X</option>
</select>
</td>
</tr>
<tr>
<td>
<button onclick="OrderTShirt();">Order T-Shirt</button>
</td>
</tr>
</table>
</body>
</html>