Question

我有模糊事件的功能，并使用正则表达式来替换模糊事件的输入值。但我有一些问题，当输入字段读取下一个事件模糊时，模糊事件仍然运行它，它使我的正则表达式运行两次并生成一个NaN，我真的很感谢你的帮助。这是我的代码：

＆＃13;

$(document).ready(function(){
  $('#myNumber').on('blur', function ({target}) {
    if ($(this).val()) {
      let number = parseInt($(this).val());
      const num = '$ ' + number.toFixed(2).replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,");
      $(this).val(num); 
    }
  });
})

＆＃13;

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
<script src="https://code.jquery.com/jquery-1.9.1.js"></script>
</head>
<body>
<input type="text" id="myNumber">
</body>
</html>

＆＃13;

Answer 1

这是因为在第一次$事件执行后你有blur个签名。

从js功能中删除它。

$(document).ready(function(){
  $('#myNumber').on('blur', function ({target}) {
    if ($(this).val()) {
      let number = parseInt($(this).val());
      const num = number.toFixed(2).replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,");
      $(this).val(num); 
    }
  });
})

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
<script src="https://code.jquery.com/jquery-1.9.1.js"></script>
</head>
<body>
<span>$</span><input type="text" id="myNumber">
</body>
</html>

Answer 2

$('#myNumber').on('blur', function ({target}) {
            if ($(this).val()) {
                var numberValue = $(this).val().trim();
                if(numberValue.charAt(0) == '$')
                {
                    var numberValue1 = $(this).val().trim().slice(2);
                    let number = parseInt(numberValue1);
                    const num = '$ ' + number.toFixed(2).replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,");
                    $(this).val(num);
                }
                else
                {
                    let number = parseInt($(this).val());
                    const num = '$ ' + number.toFixed(2).replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,");
                    $(this).val(num); 
                }
            }
        });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" id="myNumber">

Answer 3

问题在于，当您第二次获得该值时，val()中的值为'$'，因此它不是数字，而是导致NaN问题。每次进入函数时都应该替换符号。我也将const num =更改为var num = ...，因为我不确定使用会改变的const是否合适......

$(document).ready(function(){
  $('#myNumber').on('blur', function ({target}) {
    if ($(this).val()) {
      let number = parseInt($(this).val().replace('$',''));
      var num = number.toFixed(2).replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,");
      num = '$ ' + num;
      $(this).val(num); 
    }
  });
})

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
<script src="https://code.jquery.com/jquery-1.9.1.js"></script>
</head>
<body>
<input type="text" id="myNumber">
</body>
</html>

Answer 4

检查此fiddle ..

添加此js ..

＆＃13;

$(document).ready(function(){
  $('#myNumber').on('blur', function ({target}) {
    if ($(this).val()) {
      let number = parseInt($(this).val());
      const num = number.toFixed(2).replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,");
      $(this).val(num); 
    }
  });
});

＆＃13;

如何在jquery中触发模糊事件

4 个答案: