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JS implements data validation and check box form submission

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Apr 19, 2018 am 09:14 AM

javascript checkbox form

This time I will bring you JS to implement data verification and check box form submission. What are the precautions for JS to implement data verification and check box form submission? Here are practical cases. Let’s take a look. one time.

accomplish:

1. If the user selects at least one item, it means that the row is selected, and the data of the row is verified and the form is submitted; otherwise, it is not submitted.

html

<!DOCTYPE html> 
<html lang="en"> 
<head> 
 <meta charset="UTF-8"> 
 <title>带数据验证和复选框的表单提交</title> 
 <script src="../commonJqery/jquery-3.0.0.js" type="text/javascript"></script> 
 <style type="text/css"> 
  table { 
   border-collapse: collapse; 
  } 
  td,th { 
   width: 40px; 
   height: 100px; 
   border:1px solid #000; 
  } 
  table tbody tr:hover { 
   background-color: red; 
  } 
  table tbody tr:not(:first-child):hover {background-color: #666; 
  } 
  td input[name='number']{ 
   width: 100px; 
  } 
 </style> 
</head> 
<body> 
 <form action="http://www.baidu.com" id="order_shopping" name="order_shopping" method="get" onsubmit="return checkShopping();"> 
  <table id="table" class="fl"> 
   <thead> 
    <tr> 
     <th>商品名</th> 
     <th>单价</th> 
     <th>购买数量</th> 
     <th><input id="both" type="checkbox" name="both" autocomplete="off"></th> 
    </tr> 
   </thead> 
   <tbody> 
    <tr> 
     <td>香蕉</td> 
     <td>100</td> 
     <td><input type="text" name="number" autocomplete="off" placeholder="请输入数量"></td> 
     <td> 
      <input type="checkbox" name="choice" autocomplete="off"> 
     </td> 
    </tr> 
    <tr> 
     <td>苹果</td> 
     <td>100</td> 
     <td><input type="text" name="number" autocomplete="off" placeholder="请输入数量"></td> 
     <td> 
      <input type="checkbox" name="choice" autocomplete="off"> 
     </td> 
    </tr> 
   </tbody> 
  </table> 
  <input type="submit" id="add_shopping" value="添加购物车"/> 
 </form> 
 <p id="msg"></p> 
</body> 
</html>

Copy after login

<script type="text/javascript"> 
  $(function(){ 
   //全选 
   $("input[name='both']").click(function(){ 
    var $isSelected = $(this).is(":checked"); 
    for(var i = 0;i<$("input[name='choice']").length;i++){ 
     $("input[name='choice']")[i].checked = $isSelected; 
     } 
    }) 
  }); 
  // 输入正确，且有选中该行复选框才提交 
  function checkShopping(){ 
   $("#msg").html(''); 
   var $checkbox = $("input[name='choice']"); 
   var reg = /^[1-9]\d*$/; 
   var $number = ""; 
   var isInteger = false;//记录数字是否正确 
   var moreOne = false;//选择复选框个数 
   $checkbox.each(function(){ 
    if($(this).is(":checked")){ 
     $number = $(this).parent().prev().children().val(); 
     if(reg.test($number)){ 
      isInteger = true; 
      moreOne = true; 
     }else{ 
      $("#msg").html('提示：输入数量必须为正整数'); 
      isInteger = false; 
     } 
    } 
   }) 
   if(isInteger && moreOne){ 
    return true; 
   }else if(!moreOne){ 
    $("#msg").html('提示：至少选择一条信息'); 
    return false; 
   }else{ 
    return false; 
   } 
  } 
</script>

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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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