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這篇文章主要介紹了JavaScript如何實(shí)現(xiàn)購物車怎么,具有一定借鑒價(jià)值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
具體內(nèi)容如下
HTML結(jié)構(gòu)
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <link rel="stylesheet" href="./css/02-reset.css"> <link rel="stylesheet" href="./css/style.css"> </head> <body> <!-- 簡單寫個(gè)大盒子分大三欄 --> <div class="cart"> <!-- 購物車頭部 --> <div class="cart-head clearfix"> <div class="col col-check u-l"> <input type="checkbox" id="all" class="check"> <label for="all">全選</label> </div> <div class="col col-img u-l"> </div> <div class="col col-name u-l">商品名稱</div> <div class="col col-price u-l">單價(jià)</div> <div class="col col-num u-l">數(shù)量</div> <div class="col col-sum u-l">小計(jì)</div> <div class="col col-action u-r">操作</div> </div> <!-- 購物車列表 --> <div class="cart-list"> <!-- 商品塊 --> <div class="list-item"> <div class="item-box "> <div class="col col-check u-l"> <input type="checkbox" class="check single"> </div> <div class="col col-img u-l"> <img src="./images/1.jpg" alt=""> </div> <div class="col col-name u-l">8848 移動版 4GB+64GB 千峰藍(lán)</div> <div class="col col-price u-l">8888元</div> <div class="col col-num u-l "> <div class="change-goods-num"> <a href="javascript:;" class="jianhao">-</a> <input type="text" value="1"> <a href="javascript:;" class="jiahao">+</a> </div> </div> <div class="col col-sum u-l">8888元</div> <div class="col col-action u-r">刪除</div> </div> <div class="item-box "> <div class="col col-check u-l"> <input type="checkbox" class="check single"> </div> <div class="col col-img u-l"> <img src="./images/1.jpg" alt=""> </div> <div class="col col-name u-l">8848 移動版 4GB+64GB 千峰藍(lán)</div> <div class="col col-price u-l">8888元</div> <div class="col col-num u-l "> <div class="change-goods-num"> <a href="javascript:;" class="jianhao">-</a> <input type="text " value="1"> <a href="javascript:;" class="jiahao">+</a> </div> </div> <div class="col col-sum u-l">8888元</div> <div class="col col-action u-r">刪除</div> </div> <div class="item-box "> <div class="col col-check u-l"> <input type="checkbox" class="check single"> </div> <div class="col col-img u-l"> <img src="./images/1.jpg" alt=""> </div> <div class="col col-name u-l">8848 移動版 4GB+64GB 千峰藍(lán)</div> <div class="col col-price u-l">8888元</div> <div class="col col-num u-l "> <div class="change-goods-num"> <a href="javascript:;" class="jianhao">-</a> <input type="text" value="1"> <a href="javascript:;" class="jiahao">+</a> </div> </div> <div class="col col-sum u-l">8888元</div> <div class="col col-action u-r">刪除</div> </div> <div class="item-box "> <div class="col col-check u-l"> <input type="checkbox" class="check single"> </div> <div class="col col-img u-l"> <img src="./images/1.jpg" alt=""> </div> <div class="col col-name u-l">8848 移動版 4GB+64GB 千峰藍(lán)</div> <div class="col col-price u-l">8888元</div> <div class="col col-num u-l "> <div class="change-goods-num"> <a href="javascript:;" class="jianhao">-</a> <input type="text" value="1"> <a href="javascript:;" class="jiahao">+</a> </div> </div> <div class="col col-sum u-l">8888元</div> <div class="col col-action u-r">刪除</div> </div> </div> </div> <!-- 購物車底部 --> <div class="cart-foot"> <div class="section-left u-l"> <a href="">繼續(xù)購物</a> <span>已選擇 <i id="totalNum">0</i> 件商品</span> </div> <div class="u-r settlement">去結(jié)算</div> <div class="u-r total-price">合計(jì): <em id="totalPrice">0</em>元</div> </div> </div> <script type="text/javascript" src="./js/script.js"></script> </body> </html>
css結(jié)構(gòu)
/* 瀏覽器和標(biāo)簽都有默認(rèn)的樣式 清除默認(rèn)樣式 */ *{ margin: 0;padding: 0 } /* 清除加粗標(biāo)簽的默認(rèn)樣式 */ b,strong{ font-weight: normal } /* 清除傾斜標(biāo)簽的默認(rèn)樣式 */ i,em{ font-style: normal } /* 清除默認(rèn)下劃線 */ a,u{ text-decoration: none } /* 超鏈接默認(rèn)顏色為黑色 */ a{ color: #000; } /* 清除列表的默認(rèn)符號樣式 */ ul,ol,li{ list-style: none } /* 左浮動 */ .u-l{ float: left; } /* 右浮動 */ .u-r{ float: right; } /* 清除浮動 */ .clearfix{ clear: both; }
.cart{ margin:0 auto; width: 1200px; } /* 購物車頭部樣式 */ .cart-head{ height: 70px; line-height: 70px; } .col{ width: 120px; } .col-img img{ width: 100px; height: 100px; } .col-name{ width: 380px; } .col-price{ width: 160px; padding-right: 18px; } .col-num{ width: 150px; text-align: center; } .col-sum{ text-align: center; color: #ff6700; } .col-active{ text-align: center; } /* 購物車商品樣式 */ .item-box{ overflow: hidden; padding: 20px 0; border-top: 1px solid #ccc; } .change-goods-num{ width: 148px; height: 38px; border: 1px solid #000; } .change-goods-num a{ float: left; width: 38px; height: 38px; line-height: 38px; font-size: 20px; color: #000; text-align: center; } .change-goods-num input{ float: left; width: 72px; height: 38px; font-size: 18px; line-height: 38px; text-align: center; border-width: 0; } /* 底部 */ .cart-foot{ height: 50px; line-height: 50px; border: 1px solid #ccc; } .section-left a{ margin-left: 32px; color: #757575; } .section-left span{ margin-left: 16px; padding-left: 16px; color: #757575; border-left: 1px solid #ccc; } .section-left i{ color: #ff6700; } .settlement{ margin-left: 40px; padding:0 40px ; font-size: 18px; background-color: orange; color: #fff; } .total-price{ color: #ff6700; } .total-price em{ font-size: 30px; }
js結(jié)構(gòu)
//獲取到頁面中所有復(fù)選框check var check = document.querySelectorAll('.check'); console.log(check.length); //獲取到商品欄復(fù)選框 var single = document.querySelectorAll('.single'); console.log(single.length); //獲取每一行商品欄 var itemBox = document.querySelectorAll('.item-box'); console.log(itemBox); for(var i=0;i<check.length;i++){ //給所有復(fù)選框添加事件 check[i].onclick = function(e){ //判斷是否全選 var count = 0; //判斷全選框 if(e.target.getAttribute('id') == 'all'){ //把全選狀態(tài)賦值給每一個(gè)checkbox for(j=0;j<single.length;j++){ single[j].checked = this.checked } } for(var k = 0; k<single.length;k++){ if(single[k].checked){ count++; } if( count == single.length){ check[0].checked = true; }else{ check[0].checked = false; } } fTotal(); } } //給商品每一行添加事件 for(var i = 0;i<itemBox.length;i++){ itemBox[i].onclick = function(e){ var input = this.getElementsByTagName('input')[1]; switch(e.target.className){ case 'jiahao': // alert('加'); input.value = parseInt(input.value)+1; fTotalSum(this); break; case 'jianhao': // alert('減'); input.value = parseInt(input.value)-1 <=1 ? 1:parseInt(input.value)-1; fTotalSum(this); break; case 'col col-action u-r': var con = confirm('確定刪除嗎?'); if( con ){ this.parentNode.removeChild(this); } break; } //調(diào)用 計(jì)算總數(shù)量和總價(jià) fTotal() } } // 定義一個(gè)函數(shù)計(jì)算 小計(jì) That === this 就是商品每一行 function fTotalSum(That){ //獲取當(dāng)前行的數(shù)量 var num = That.getElementsByTagName('input')[1].value; //獲取當(dāng)前行的單價(jià) 取整是為了省略掉'元'字符串,方便計(jì)算 var price = parseInt(That.querySelector('.col-price').innerHTML); // 最終小計(jì)值為數(shù)量乘以單價(jià) That.querySelector('.col-sum').innerHTML = num * price+'元'; }; //定義一個(gè)函數(shù) 方便調(diào)用總數(shù)量 和 合計(jì) function fTotal(){ //獲取到總價(jià)節(jié)點(diǎn) var totalPrice = document.getElementById('totalPrice'); //總價(jià) var price = 0; //獲取到總件節(jié)點(diǎn) var totalNum = document.getElementById('totalNum'); //數(shù)量總和 var Num = 0; //獲取每一行商品盒子 var itemBox = document.querySelectorAll('.item-box'); for(var i = 0; i<itemBox.length;i++){ itemBox[i].getElementsByTagName('input')[1].value; //選中了,才拿數(shù)量和價(jià)格 if( itemBox[i].getElementsByTagName('input')[0].checked ){ Num += parseInt(itemBox[i].getElementsByTagName('input')[1].value); price += parseInt(itemBox[i].querySelector('.col-sum').innerHTML); } } //合并把總和數(shù)量寫到標(biāo)簽里 totalNum.innerHTML = Num; totalPrice.innerHTML = price; }
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