需求
使用JS实现购物车功能02
具体代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>购物车02</title> </head> <body> <table align="center" border="2" id = "shop"> <tr> <th colspan="4" align="center">商品列表<input id="add" type="button" value="一键上架"></th> </tr> <tr> <th>商品序号</th> <th>商品名称</th> <th>出售价格</th> <th>操作</th> </tr> </table> <br> <br> <br> <br> <br> <table align="center" border="2" id = "cart"> <tr> <th colspan="4" align="center">购物车<input id="clear" type="button" value="一键清空"></th> </tr> <tr> <th>商品名称</th> <th>商品价格</th> <th>商品数量</th> <th>操作</th> </tr> </table> <h3 id="total" align="center">总价: ￥0.0</h3> <script type="text/javascript"> var goods_name = ["阿尔卑斯棒棒糖","耳机","北京糖葫芦","智能扫地机器人"]; var goods_price = ["1.5","30","5","258"]; //一键上架 var add = document.getElementById("add"); add.onclick = function(){ var shop = document.getElementById("shop"); for(var i = 0; i< goods_name.length;i++){ var row = shop.insertRow(); row.insertCell().innerHTML = i + 1; row.insertCell().innerHTML = goods_name[i]; row.insertCell().innerHTML = "￥" + goods_price[i]; row.insertCell().innerHTML = "<button id='" + i + "' onclick='addCart(this);'>加入购物车</button>"; } this.setAttribute("disabled", true); } var cartData = { } var index = 0; //准备加入购物车的数据 function addCart(btn) { var gname = goods_name[btn.id]; var gobj = cartData[gname]; if(!gobj){//没有数据 //新增一条数据 cartData[goods_name[btn.id]] = { id:btn.id, count:1, index:index++ } }else{ cartData[goods_name[btn.id]].count++; } //console.log(cartData); showCart(cartData); } //加入购物车 function showCart(obj){ clearCart(); getTotal(obj); var cart = document.getElementById("cart"); for(var k in obj){ var row = cart.insertRow(); row.insertCell().innerHTML = k; row.insertCell().innerHTML = "￥" + goods_price[obj[k].id]; row.insertCell().innerHTML = obj[k].count; row.insertCell().innerHTML = "<button id='" + k + "' onclick='deleteRow(this);'>删除</button>"; } } //清空购物车 var clear = document.getElementById("clear"); clear.onclick = function(){ clearCart(); cartData = {}; } //清空购物车的方法 function clearCart(){ var cart = document.getElementById("cart"); var rows = cart.rows; for(var i = rows.length - 1 ; i > 1 ; i--){ cart.deleteRow(i); } total = 0.0; //更新总价 document.getElementById("total").innerHTML = "总价:￥" + total; } var total = 0.0; //得到总价 function getTotal(obj){ for(var k in obj){ var subTotal = goods_price[obj[k].id] * obj[k].count; total += subTotal; } //更新总价 document.getElementById("total").innerHTML = "总价:￥" + total; } //删除整行 function deleteRow(btn){ var cart = document.getElementById("cart"); var rowIndex = btn.parentNode.parentNode.rowIndex; cart.deleteRow(rowIndex); delete cartData[btn.id]; total = 0.0; getTotal(cartData); } </script> </body> </html>
效果图
样式比较丑，不要介意哈
