基于html5 localStorage的购物车JS脚本

最近在做html5这一块，参考网上的代码写了一个购物车js脚本，很简单，直接上代码，shoppingcart.js：

[javascript]

utils = {

tparam : function (name,value){

localstorage.titem(name,value)

},

getparam : function(name){

return localstorage.getitem(name)

}

}

product={

id:0,

name:””,

num:0,

price:0.00,

};

orderdetail={

urname:””,

phone:””,

address:””,

zipcode:””,

totalnumber:0,

totalamount:0.00

}

cart = {

//向购物车中添加商品

addproduct:function(product){

var shoppingcart = utils.getparam(“shoppingcart”);

if(shoppingcart==null||shoppingcart==””){

//第一次加入商品

var jsonstr = {“productlist”:[{“id”:product.id,”name”:product.name,”num”:product.num,”price”:product.price}],”totalnumber”:product.num,”totalamount”:(product.price*product.num)};

utils.tparam(“shoppingcart”,”‘”+json.stringify(jsonstr));

}el{

var jsonstr = json.par(shoppingcart.substr(1,shoppingcart.le干部教育培训ngth));

var productlist = jsonstr.productlist;

var result=fal;

//查找购物车中是否有该商品

for(var i in productlist){

if(productlist[i].id==product.id){

productlist[i].num=parint(productlist[i].num)+parint(product.num);

result = true;

}

}

if(!result){

//没有该商品就直接加进去

productlist.push({“id”:product.id,”name”:product.name,”num”:product.num,”price”:product.price});

}

//重新计算总价

jsonstr.totalnumber=parint(jsonstr.totalnumber)+parint(product.num);

jsonstr.totalamount=parfloat(jsonstr.totalamount)+(parint(product.num)*parfloat(product.price));

orderdetail.totalnumber = jsonstr.totalnumber;

orderdetail.totalamount = jsonstr.totalamount;

//保存购物车

utils.tparam(“shoppingcart”,”‘”+json.stringify(jsonstr));

}

},

//修改给买商品数量

updateproductnum:function(id,num){

var shoppingcart = utils.getparam(“shoppingcart”);

var jsonstr = json.par(shoppingcart.substr(1,shoppingcart.length));

var productlist = jsonstr.productlist;

for(var i in productlist){

if(productlist[i].id==id){

jsonstr.totalnumber=parint(json含有雨的诗句str.totalnumhit过去式ber)+(parint(num)-parint(productlist[i].num));

jsonstr.totalamount=parfloat(jsonstr.totalamount)+((parint(num)*pars草皮efloat(productlist[i].price))-parint(productlist[i].num)*parfloat(productlist[i].price));

productlist[i].num=parint(num);

orderdetail.totalnumber = jsonstr.totalnumber;

orderdetail.totalamount = jsonstr.totalamount;

utils.tparam(“shoppingcart”,”‘”+json.stringify(jsonstr));

return;

}

}

},

//获取购物车中的所有商品

getproductlist:function(){

var shoppingcart = utils.getparam(“shoppingcart”);

var jsonstr = json.par(shoppingcart.substr(1,shoppingcart.length));

var productlist = jsonstr.productlist;

orderdetail.totalnumber = jsonstr.totalnumber;

orderdetail.totalamount = jsonstr.totalamount;

return productlist;

},

//判断购物车中是否存在商品

existproduct:function(id){

var shoppingcart = utils.getparam(“shoppingcart”);

var jsonstr = json.par(shoppingcart.substr(1,shoppingcart.length));

var productlist = jsonstr.productlist;

var result=fal;

for(var i in productlist){

if(productlist[i].id==product.id){

result = true;

}

}

return result;

},

//删除购物车中商品

deleteproduct:function(id){

var shop什么是多士炉pingcart = utils.getparam(“shoppingcart”);

var jsonstr = json.par(shoppingcart.substr(1,shoppingcart.length));

var productlist = jsonstr.productlist;

var list=[];

for(var i in productlist){

if(productlist[i].id==id){

jsonstr.totalnumber=parint(jsonstr.totalnumber)-parint(productlist[i].num);

jsonstr.totalamount=parfloat(jsonstr.totalamount)-parint(productlist[i].num)*parfloat(productlist[i].price);

}el{

list.push(productlist[i]);

}

}

jsonstr.productlist = list;

orderdetail.totalnumber = jsonstr.totalnumber;

orderdetail.totalamount = jsonstr.totalamount;

utils.tparam(“shoppingcart”,”‘”+json.stringify(jsonstr));

}

};

使用也很简单：

[javascript]

var product =

{

‘id’: id, //属性名用引号括起来，属性间由逗号隔开

‘name’: ‘hhh’,

‘num’:jq(‘#text-4’).val(),

‘price’:199.9

};

//商品加入到购物车

cart.addproduct(product);

var productlist=cart.getproductlist();//取出购物车商品

alert(”, ‘商品:’+productlist[0].id+’ ‘+productlist[0].name+’ ‘+productlist[0].num+’ ‘+productlist[0].price, ‘确定’);