![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Correction status：Uncorrected
Teacher's comments：
Collection
Collection
注意点：在FOR循环开始时声明变量，在FOR循环结束后输出对象
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<style>
span {
width: 100px;
height: 30px;
border: 1px solid #000;
display: inline-block;
text-align: center;
line-height: 30px
}
.box {
border: 2px solid red;
}
.buynow {
border: 1px solid lightgray;
width: 80px;
height: 30px;
text-align: center;
line-height: 30px;
cursor: pointer;
}
</style>
</head>
<body>
<div style="width:400px;text-align: center;">请选择规格</div>
<div>
<p class="item" name="version">
<b>型号</b>
<span>X23</span>
<span>X30</span>
<span>X88</span>
</p>
<p class="item" name="color">
<b>颜色</b>
<span>红色</span>
<span>黑色</span>
<span>金色</span>
</p>
<p class="item" name="memory">
<b>内存</b>
<span>32G</span>
<span>64G</span>
<span>128G</span>
</p>
<p class="buynow">加入购物车</p>
</div>
<script>
$(document).ready(function () {
$('span').click(function () {
if ($(this).hasClass('box')) {
$(this).removeClass('box');
} else {
$(this).addClass('box').siblings('span').removeClass('box')
}
})
$('.buynow').click(function () {
var findbox = $(this).siblings('p').children('span.box');
var leng = findbox.length;
var findbox2 = $('.item').children('b');
var leng2 = $('.item').length;
if (leng != leng2) {
alert('请选择全部的***项')
return false;
}else{
var from, key, value
from = {}
for (var i = 0; i < leng; i++) {
key = findbox2[i].innerHTML
value = findbox[i].innerHTML
from[key] = value;
}
console.log(from)
}
})
})
</script>
</body>
</html>点击 "运行实例" 按钮查看在线实例
