JQuery實現購物車數量加減總價累加
阿新 • • 發佈：2018-12-26
<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8" /> <title>jQuery實現購物車多物品數量的加減+總價計算</title> <script type="text/javascript" src="http://code.jquery.com/jquery-1.6.1.min.js"></script> <script> $(function(){ $(".add").click(function(){ var t = $(this).parent().find('input[class*=text_box]'); t.val(parseInt(t.val())+1); setTotal(); }) $(".min").click(function(){ var t = $(this).parent().find("input[class*=text_box]"); t.val(parseInt(t.val())-1); if(parseInt(t.val())<0){ t.val(0); } setTotal() }) function setTotal(){ var sum = 0; $("#tab td").each(function(){ var num = parseInt($(this).find("input[class*=text_box]").val()); var price = parseFloat($(this).find("span[class*=price]").text()); sum += num*price; }) $("#total").html(sum.toFixed(2)); } setTotal(); }) </script> </head> <body> <table id="tab"> <tr> <td> <span>單價:</span><span class="price">1.50</span> <input class="min" name="" type="button" value="-" /> <input class="text_box" name="" type="text" value="1" /> <input class="add" name="" type="button" value="+" /> </td> </tr> <tr> <td> <span>單價:</span><span class="price">3.95</span> <input class="min" name="" type="button" value="-" /> <input class="text_box" name="" type="text" value="1" /> <input class="add" name="" type="button" value="+" /> </td> </tr> </table> <p>總價：<label id="total"></label></p> </body> </html>
再舉一個獲取tr下面第一個td的值：
<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8" /> <title></title> <script type="text/javascript" src="http://code.jquery.com/jquery-1.6.1.min.js"></script> <script> $(function(){ $(".add").click(function(){ var t = $(this).parent().parent().find('td:first'); console.info(t.text()); }) }) </script> </head> <body> <table id="tab"> <tr> <th>ID</th> <th>name</th> <th>操作</th> </tr> <tr> <td class="id">123</td> <td>admin</td> <td><a href="#" class="add">彈</a></td> </tr> <tr> <td class="id">456</td> <td>ceshi</td> <td><a href="#" class="add">彈</a></td> </tr> </body> </html>