本篇文章主要向大家介绍关于JavaScript实现购物车效果的具体代码,直接看下面:
HTML:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <style type="text/css"> table { border: 1px solid #e9e9e9; border-collapse: collapse; border-spacing: 0; } td { padding: 8px 16px; border: 1px solid #e9e9e9; text-align: left; } td img { width: 50px; height: 50px; } th { background-color: #f7f7f7; color: #5c6b77; font-weight: 600; } </style> </head> <body> 图书类型:<select id="xlxx" onchange="tslx()"> <option value="全部">全部</option> <option value="科幻">科幻</option> <option value="小说">小说</option> <option value="文学">文学</option> <option value="悬疑">悬疑</option> </select> <table border="0"> <tr> <th><button type="button" style="border: 0;background-color: #f7f7f7;" id="qbxz" onclick="quanxuan ()">全选</button></th> <th>序号</th> <th>商品名</th> <th>书籍名</th> <th>分类</th> <th>价格</th> <th>购买数量</th> <th>操作</th> </tr> <tr name="wx"> <td><input type="checkbox" name="cb" onchange="zhjs()" id="" value="" class="qx" /></td> <td>1</td> <td><img onmouseover="tpmax(this.src)" onmouseout="tpmin()" src="../img/20180520083915_sMx82.jpeg"></td> <td>活着</td> <td>文学</td> <td><label name="jg">25</label></td> <td> <button onclick="jia('num1')">+</button> <label id="num1" name="num">1</label> <button onclick="jian('num1')">-</button> </td> <td><button onclick="deletet(1)">移除</button></td> </tr> <tr name="kh"> <td><input type="checkbox" name="cb" onchange="zhjs()" id="" value="" class="qx" /></td> <td>2</td> <td><img onmouseover="tpmax(this.src)" onmouseout="tpmin()" src="../img/20180520083916_8ntMr.jpeg"></td> <td>活着2</td> <td>科幻</td> <td><label name="jg">30</label></td> <td> <button onclick="jia('num2')">+</button> <label id="num2" name="num">1</label> <button onclick="jian('num2')">-</button> </td> <td><button onclick="deletet(2)">移除</button></td> </tr> <tr name="xs"> <td><input type="checkbox" name="cb" onchange="zhjs()" id="" value="" class="qx" /></td> <td>3</td> <td><img onmouseover="tpmax(this.src)" onmouseout="tpmin()" src="../img/20191227173047_zrXxQ.jpeg"></td> <td>活着3</td> <td>小说</td> <td><label name="jg">35</label></td> <td> <button onclick="jia('num3')">+</button> <label id="num3" name="num">1</label> <button onclick="jian('num3')">-</button> </td> <td><button onclick="deletet(3)">移除</button></td> </tr> <tr name="xy"> <td><input type="checkbox" name="cb" onchange="zhjs()" id="" value="" class="qx" /></td> <td>4</td> <td><img onmouseover="tpmax(this.src)" onmouseout="tpmin()" src="../img/20191227173048_eGeBA.jpeg"></td> <td>活着4</td> <td>悬疑</td> <td><label name="jg">40</label></td> <td> <button onclick="jia('num4')">+</button> <label id="num4" name="num">1</label> <button onclick="jian('num4')">-</button> </td> <td><button onclick="deletet(4)">移除</button></td> </tr> </table> <h1 id="nr" style="display: none;">购物车为空!</h1> 总金额:<label id="zh" style="color: red;">0</label>¥ <img src="" style="width: 150px;" id="img"> </body> <script type="text/javascript"> </script> <script src="../js/gwc.js" type="text/javascript" charset="utf-8"></script> </html>
JavaScript:
/* 1.图片悬浮时的放大 2.全选 3.分类 4.数值的加减 5.总和的实现 6.删除功能 */ // 1.图片悬浮时的放大 // 图片移入放大 function tpmax(lj) { //移入 将获取到的图片路径加载到下方显示图片路径实现移入显示 document.getElementById("img").src = lj } // 图片移出隐藏 function tpmin() { //移出 将空的图片路径加载到下方显示图片路径实现移出不显示 document.getElementById("img").src = ""; } // 2.全选 function quanxuan() { var qxaj = document.getElementsByClassName("qx"); // 遍历判断复选框的状态 for (var i = 0; i < qxaj.length; i++) { if (qxaj[i].checked == true) { for (var i = 0; i < qxaj.length; i++) { qxaj[i].checked = false; } } else { for (var i = 0; i < qxaj.length; i++) { qxaj[i].checked = true; } } } zhjs(); } // 3.分类 /* 1.只显示分类的:将不属于的分类隐藏,直显示匹配的行 2.显示与隐藏两个方法 */ function tslx() { var xlxx = document.getElementById("xlxx").value; var kh = document.getElementsByName("kh"); var xs = document.getElementsByName("xs"); var wx = document.getElementsByName("wx"); var xy = document.getElementsByName("xy"); if (xlxx == "全部") { xianshi(kh); xianshi(xs); xianshi(wx); xianshi(xy); } if (xlxx == "科幻") { xianshi(kh); yincang(xs); yincang(wx); yincang(xy); } if (xlxx == "文学") { yincang(kh); yincang(xs); xianshi(wx); yincang(xy); } if (xlxx == "小说") { yincang(kh); xianshi(xs); yincang(wx); yincang(xy); } if (xlxx == "悬疑") { yincang(kh); yincang(xs); yincang(wx); xianshi(xy); } } // 显示 function xianshi(xlxx) { // 遍历寻找匹配的值 for (var i = 0; i < xlxx.length; i++) { xlxx[i].style.visibility = "visible"; } } // 隐藏 function yincang(xlxx) { for (var i = 0; i < xlxx.length; i++) { xlxx[i].style.visibility = "collapse"; } } // 4.数值的加减 function jian(numid) { var num = document.getElementById(numid).innerHTML; var ljnum = parseInt(num) - 1; if (ljnum > 0) { document.getElementById(numid).innerHTML = ljnum; } zhjs(); } function jia(numid) { // 得到原始值 var num = document.getElementById(numid).innerHTML; // 得到累加值 var ljnum = parseInt(num) + 1; // 赋值 document.getElementById(numid).innerHTML = ljnum; zhjs(); } //5.总和计算 function zhjs() { var jg = document.getElementsByName("jg"); var sl = document.getElementsByName("num"); var cb = document.getElementsByName("cb"); var sum = 0; for (var i = 0; i < cb.length; i++) { if (cb[i].checked == true) { sum += parseInt(jg[i].innerHTML) * parseInt(sl[i].innerHTML); } } document.getElementById("zh").innerHTML = sum; } // 6.删除 // 遍历全部tr var s = 0; var qbtr = document.getElementsByTagName("tr"); for (var i = 0; i < qbtr.length; i++) { s++; } function deletet(index) { // tr() var c = document.getElementsByName("cb"); c[index - 1].checked = false; var h = document.getElementsByTagName("tr"); h[index].style.display = "none"; s--; if (s == 1) { document.getElementById("nr").style.display = "block"; document.getElementById("cartb").style.display = "none"; document.getElementById("stype").style.display = "none"; } zhjs(); }
效果:
全选:
分类:
删除:
添加数量
文章版权归作者所有,未经允许请勿转载,若此文章存在违规行为,您可以联系管理员删除。
转载请注明本文地址:https://www.ucloud.cn/yun/128221.html
摘要:资源开发文档是一套完全免费的微信小程序开发框架,扩展了小程序的能力。推荐有一些不错的解决方案封装封装跨页面事件通讯监听数据变化开发如何在微信小程序的页面间传递数据需要时可以快速过一遍。微信小程序回调,,,的使用例子供参考 这篇文章主要记录我做小程序「轻算账」过程中遇到的一些问题和解决方案,就当是做个总结,也希望其中有能够帮助到他人的信息。 showImg(https://segment...
阅读 481·2023-03-27 18:33
阅读 688·2023-03-26 17:27
阅读 591·2023-03-26 17:14
阅读 559·2023-03-17 21:13
阅读 476·2023-03-17 08:28
阅读 1720·2023-02-27 22:32
阅读 1217·2023-02-27 22:27
阅读 2032·2023-01-20 08:28