jQuery查找信用卡类型

问题描述

我发现这个简单的函数可以返回四种最常见的信用卡类型.

I found this simple function to return the 4 most common credit card types.

作为jQuery的新手，当用户在输入字段中输入信用卡号时，我可以使用哪种jQuery插件显示信用卡类型?

Being new to jQuery, what jQuery plugin can I use to display the credit card type as a user types in a credit card number in a input field?

 function creditCardTypeFromNumber(num) {
   // first, sanitize the number by removing all non-digit characters.
   num = num.replace(/[^\d]/g,'');
   // now test the number against some regexes to figure out the card type.
   if (num.match(/^5[1-5]\d{14}$/)) {
     return 'MasterCard';
   } else if (num.match(/^4\d{15}/) || num.match(/^4\d{12}/)) {
     return 'Visa';
   } else if (num.match(/^3[47]\d{13}/)) {
     return 'AmEx';
   } else if (num.match(/^6011\d{12}/)) {
     return 'Discover';
   }
   return 'UNKNOWN';
 }

谢谢！

推荐答案

$('#someTextBox').change(function() {
    $('#someOutput').text(creditCardTypeFromNumber($(this).val()));
});

这将与id="someOutput"输出到某个元素中，该文本框的结果将在用户更改元素id="someTextBox"中的文本时触发.

This will output into some element with id="someOutput" the result of the text box which fires when the user changes the text in the element id="someTextBox".

这篇关于jQuery查找信用卡类型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！