计算原生代码+json实现购物车结算功能
2017-11-06 20:24
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样式
js
json
js特效
注意这里：写入ajax之后会出现一个bug，就是js特效无法使用？，解决办法就是把特效放入一个新的js文件中加页面加载事件
*{margin:0;padding:0;list-style-type:none;}a{color:#666;text-decoration:none;}table{border-collapse:collapse;border-spacing:0;border:0;}body{color:#666;font:12px/180% Arial, Helvetica, sans-serif, "新宋体";}clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden}.clearfix{display:inline-table}*html .clearfix{height:1%}.clearfix{display:block}*+html .clearfix{min-height:1%}.fl{float:left;}.fr{float:right;}.catbox{width:940px;margin:100px auto;}.catbox table{text-align:center;width:100%;}.catbox table th,.catbox table td{border:1px solid #CADEFF;}.catbox table th{background:#e2f2ff;border-top:3px solid #a7cbff;height:30px;}.catbox table td{padding:10px;color:#444;}.catbox table tbody tr:hover{background:RGB(238,246,255);}.checkbox{width:60px;}.check-all{ vertical-align:middle;}.goods{width:300px;}.goods span{width:180px;margin-top:20px;text-align:left;float:left;}.goods img{width:100px;height:80px;margin-right:10px;float:left;}.price{width:130px;}.count{width:90px;}.count .add, .count input, .count .reduce{float:left;margin-right:-1px;position:relative;z-index:0;}.count .add, .count .reduce{height:23px;width:17px;border:1px solid #e5e5e5;background:#f0f0f0;text-align:center;line-height:23px;color:#444;}.count .add:hover, .count .reduce:hover{color:#f50;z-index:3;border-color:#f60;cursor:pointer;}.count input{width:50px;height:25px;line-height:15px;border:1px solid #aaa;color:#343434;text-align:center;padding:4px 0;background-color:#fff;z-index:2;}.subtotal{width:150px;color:red;font-weight:bold;}.operation span:hover,a:hover{cursor:pointer;color:red;text-decoration:underline;}.foot{margin-top:0px;color:#666;height:48px;border:1px solid #c8c8c8;border-top:0;background-color:#eaeaea;background-image:linear-gradient(RGB(241,241,241),RGB(226,226,226));position:relative;z-index:8;}.foot div, .foot a{line-height:48px;height:48px;}.foot .select-all{width:80px;height:48px;line-height:48px;color:#666;text-align:center;}.foot .delete{padding-left:10px;}.foot .closing{border-left:1px solid #c8c8c8;width:103px;text-align:center;color:#666;font-weight:bold;cursor:pointer;background-image:linear-gradient(RGB(241,241,241),RGB(226,226,226));}.foot .closing:hover{background-image:linear-gradient(RGB(226,226,226),RGB(241,241,241));color:#333;}.foot .total{margin:0 20px;cursor:pointer;}.foot #priceTotal, .foot #selectedTotal{color:red;font-family:"Microsoft Yahei";font-weight:bold;}.foot .selected{cursor:pointer;}.foot .selected .arrow{position:relative;top:-3px;margin-left:3px;}.foot .selected .down{position:relative;top:3px;display:none;}.show .selected .down{display:inline;}.show .selected .up{display:none;}.foot .selected:hover .arrow{color:red;}.foot .selected-view{width:938px;border:1px solid #c8c8c8;position:absolute;height:auto;background:#ffffff;z-index:9;bottom:48px;left:-1px;display:none;}.show .selected-view{display:block;}.foot .selected-view div{height:auto;}.foot .selected-view .arrow{font-size:16px;line-height:100%;color:#c8c8c8;position:absolute;right:330px;bottom:-9px;}.foot .selected-view .arrow span{color:#ffffff;position:absolute;left:0px;bottom:1px;}#selectedViewList{padding:10px 20px 10px 20px;}#selectedViewList div{display:inline-block;position:relative;width:100px;height:80px;border:1px solid #ccc;margin:10px;float:left;}#selectedViewList div img{width:100px;height:80px;margin-right:10px;float:left;}#selectedViewList div span{display:none;color:#ffffff;font-size:12px;position:absolute;top:0px;right:0px;width:60px;height:18px;line-height:18px;text-align:center;background:#000;cursor:pointer;}#selectedViewList div:hover span{display:block;}页面html<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <link rel="stylesheet" href="css/style.css" type="text/css"> </head> <body> <div class="catbox"> <table id="cartTable"> <thead> <tr> <th><label> <input class="check-all check" type="checkbox"> 全选</label></th> <th>商品</th> <th>单价</th> <th>数量</th> <th>小计</th> <th>操作</th> </tr> </thead> <tbody id="tab"> </tbody> </table> <div class="foot" id="foot"> <label class="fl select-all"><input type="checkbox" class="check-all check"> 全选</label> <a class="fl delete" id="deleteAll" href="javascript:;">删除</a> <div class="fr closing" onclick="getTotal();">结 算</div> 4000 <input type="hidden" id="cartTotalPrice"> <div class="fr total">合计：￥<span id="priceTotal">11957.48</span></div> <div class="fr selected" id="selected">已选商品<span id="selectedTotal">4</span>件<span class="arrow up">︽</span><span class="arrow down">︾</span></div> <div class="selected-view"> <div id="selectedViewList" class="clearfix"><div><img src="images/1.jpg"><span class="del" index="0">取消选择</span></div><div><img src="images/2.jpg"><span class="del" index="1">取消选择</span></div><div><img src="images/3.jpg"><span class="del" index="2">取消选择</span></div><div><img src="images/4.jpg"><span class="del" index="3">取消选择</span></div></div> <span class="arrow">◆<span>◆</span></span> </div> </div> </div> </body> </html>
js
<script>
//ajax获取JSON数据
var ajax,tab=document.getElementById("tab"),html="";
if(window.XMLHttpRequest) {
ajax = new XMLHttpRequest()
}else {
ajax=new ActiveXObject("Microsoft,Http")
}
ajax.open("get","js/shop.json",true)
ajax.send()
ajax.onreadystatechange=function () {
if(ajax.readyState==4&&ajax.status==200){
// console.log(ajax.responseText)
var str=JSON.parse(ajax.responseText)
for (var i=0;i<str.length;i++){
// console.log(str[i])
html+="<tr class='on'>"
html+="<td class='checkbox'><input class='check-one check' type='checkbox'></td>"
html+="<td class='goods'><img src='images/"+str[i].img+"'alt=''><span>"+str[i].shopping_name+"</span></td>"
html+="<td class='price'>"+str[i].price+"</td>"
html+="<td class='count'><span class='reduce'></span>"
html+="<input class='count-input' type='text' value='"+str[i].num+"'>"
html+="<span class='add'>+</span></td>"
html+="<td class='subtotal'>"+str[i].subtotal+"</td>"
html+="<td class='operation'><span class='delete'>删除</span></td>"
html+="</tr>"
tab.innerHTML=html
}
}
}
</script>
<script src="js/shop.js" type="application/javascript"></script>json
[
{"img":"1.jpg","shopping_name":"Casio/卡西欧 EX-TR350","price":"5999.88","subtotal":"5999.88","num":"1"},
{"img":"2.jpg","shopping_name":"Canon/佳能 PowerShot SX50 HS","price":"5999.88","subtotal":"5999.88","num":"1"},
{"img":"3.jpg","shopping_name":"Sony/索尼 DSC-WX300","price":"5999.88","subtotal":"5999.88","num":"1"},
{"img":"4.jpg","shopping_name":"Fujifilm/富士 instax mini 25","price":"5999.88","subtotal":"5999.88","num":"1"}
]js特效
window.onload = function () {
if (!document.getElementsByClassName) {
document.getElementsByClassName = function (cls) {
var ret = [];
var els = document.getElementsByTagName('*');
for (var i = 0, len = els.length; i < len; i++) {
if (els[i].className.indexOf(cls + ' ') >=0 || els[i].className.indexOf(' ' + cls + ' ') >=0 || els[i].className.indexOf(' ' + cls) >=0) {
ret.push(els[i]);
}
}
return ret;
}
}
var table = document.getElementById('cartTable'); // 购物车表格
var selectInputs = document.getElementsByClassName('check'); // 所有勾选框
var checkAllInputs = document.getElementsByClassName('check-all') // 全选框
var tr = table.children[1].rows; //行
var selectedTotal = document.getElementById('selectedTotal'); //已选商品数目容器
var priceTotal = document.getElementById('priceTotal'); //总计
var deleteAll = document.getElementById('deleteAll'); // 删除全部按钮
var selectedViewList = document.getElementById('selectedViewList'); //浮层已选商品列表容器
var selected = document.getElementById('selected'); //已选商品
var foot = document.getElementById('foot');
// 更新总数和总价格，已选浮层
function getTotal() {
var seleted = 0;
var price = 0;
var HTMLstr = '';
for (var i = 0, len = tr.length; i < len; i++) {
if (tr[i].getElementsByTagName('input')[0].checked) {
tr[i].className = 'on';
seleted += parseInt(tr[i].getElementsByTagName('input')[1].value);
price += parseFloat(tr[i].cells[4].innerHTML);
HTMLstr += '<div><img src="' + tr[i].getElementsByTagName('img')[0].src + '"><span class="del" index="' + i + '">取消选择</span></div>'
}
else {
tr[i].className = '';
}
}
selectedTotal.innerHTML = seleted;
priceTotal.innerHTML = price.toFixed(2);
selectedViewList.innerHTML = HTMLstr;
if (seleted == 0) {
foot.className = 'foot';
}
}
// 计算单行价格
function getSubtotal(tr) {
var cells = tr.cells;
var price = cells[2]; //单价
var subtotal = cells[4]; //小计td
var countInput = tr.getElementsByTagName('input')[1]; //数目input
var span = tr.getElementsByTagName('span')[1]; //-号
//写入HTML
subtotal.innerHTML = (parseInt(countInput.value) * parseFloat(price.innerHTML)).toFixed(2);
//如果数目只有一个，把-号去掉
if (countInput.value == 1) {
span.innerHTML = '';
}else{
span.innerHTML = '-';
}
}
// 点击选择框
for(var i = 0; i < selectInputs.length; i++ ){
selectInputs[i].onclick = function () {
if (this.className.indexOf('check-all') >= 0) { //如果是全选，则吧所有的选择框选中
for (var j = 0; j < selectInputs.length; j++) {
selectInputs[j].checked = this.checked;
}
}
if (!this.checked) { //只要有一个未勾选，则取消全选框的选中状态
for (var i = 0; i < checkAllInputs.length; i++) {
checkAllInputs[i].checked = false;
}
}
getTotal();//选完更新总计
}
}
// 显示已选商品弹层
selected.onclick = function () {
if (selectedTotal.innerHTML != 0) {
foot.className = (foot.className == 'foot' ? 'foot show' : 'foot');
}
}
//已选商品弹层中的取消选择按钮
selectedViewList.onclick = function (e) {
var e = e || window.event;
var el = e.srcElement;
if (el.className=='del') {
var input = tr[el.getAttribute('index')].getElementsByTagName('input')[0]
input.checked = false;
input.onclick();
}
}
//为每行元素添加事件
for (var i = 0; i < tr.length; i++) {
//将点击事件绑定到tr元素
tr[i].onclick = function (e) {
var e = e || window.event;
var el = e.target || e.srcElement; //通过事件对象的target属性获取触发元素
var cls = el.className; //触发元素的class
var countInout = this.getElementsByTagName('input')[1]; // 数目input
var value = parseInt(countInout.value); //数目
//通过判断触发元素的class确定用户点击了哪个元素
switch (cls) {
case 'add': //点击了加号
countInout.value = value + 1;
getSubtotal(this);
break;
case 'reduce': //点击了减号
if (value > 1) {
countInout.value = value - 1;
getSubtotal(this);
}
break;
case 'delete': //点击了删除
var conf = confirm('确定删除此商品吗？');
if (conf) {
this.parentNode.removeChild(this);
}
break;
}
getTotal();
}
// 给数目输入框绑定keyup事件
tr[i].getElementsByTagName('input')[1].onkeyup = function () {
var val = parseInt(this.value);
if (isNaN(val) || val <= 0) {
val = 1;
}
if (this.value != val) {
this.value = val;
}
getSubtotal(this.parentNode.parentNode); //更新小计
getTotal(); //更新总数
}
}
// 点击全部删除
deleteAll.onclick = function () {
if (selectedTotal.innerHTML != 0) {
var con = confirm('确定删除所选商品吗？'); //弹出确认框
if (con) {
for (var i = 0; i < tr.length; i++) {
// 如果被选中，就删除相应的行
if (tr[i].getElementsByTagName('input')[0].checked) {
tr[i].parentNode.removeChild(tr[i]); // 删除相应节点
i--; //回退下标位置
}
}
}
} else {
alert('请选择商品！');
}
getTotal(); //更新总数
}
// p.
// 默认全选
checkAllInputs[0].checked = true;
checkAllInputs[0].onclick();
}注意这里：写入ajax之后会出现一个bug，就是js特效无法使用？，解决办法就是把特效放入一个新的js文件中加页面加载事件
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