Question

当我输入输入字段中的值时，我想查找此人是否少于18岁。为此，我创建了一个日期输入框并创建了一个函数。我的功能无法正常工作。我做错了什么，我该怎样才能做到这一点？

    <!doctype html>
    <html lang="en">
    <head>
      <meta charset="utf-8">
      <meta name="viewport" content="width=device-width, initial-scale=1">
      <title>Birthday Validation</title>
      <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
      <link rel="stylesheet" href="/resources/demos/style.css">
      <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
      <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>

    <script>

        $(document).ready(function () {
                $("#DOB").on("change paste keyup", function() {


                $datestring = $(this).val();
                //alert(jQuery.type(Date($datestring)));       

                //$eightYearsAgo = now() - $birthday;
                $birthday = $.datepicker.formatDate('yy/mm/dd', new Date()) - Date($datestring);


                if(!birthday.isValid()){
                     alert("INVALID DATE");
                }else if (eightYearsAgo.isAfter(birthday)){
                     alert("18+");
                }else{
                     alert("< 18");
                }

            });
        }); 
    </script>

    </head> 


    <body>

    <input name="DOB" type="date" class="form-control" id="DOB" required  placeholder="MM/DD/YYYY" onchange="validate(date)"> 


    </body>
    </html>

Answer 1

我已经完成了这项工作，您需要使用正确的datePicker功能才能使其正常运行。

这是代码：

$(document).ready(function () {
    $("#age").datepicker({
        onSelect: function(value, ui) {
            var current = new Date().getTime(), 
                dateSelect = new Date(value).getTime();
                age = current - dateSelect;
                ageGet = Math.floor(age / 1000 / 60 / 60 / 24 / 365.25); // age / ms / sec / min / hour / days in a year
            if(ageGet < 18){
                less_than_18(ageGet);
            }else{
                greater_than_18(ageGet);
            }
        },
        yearRange: '1900:+0d',//base year:current year
        changeMonth: true,
        changeYear: true,
        defaultDate: '-18yr',
    }).attr("readonly", "readonly"); //prevent manual changes


    function less_than_18(theAge){
        alert("Failed! your age is less than 18. Age: "+theAge);
    }
    function greater_than_18(theAge){
        alert("Done! your age is greater or equal to 18. Age: "+theAge);
    }
});

您可以在此处测试：https://jsfiddle.net/h4ppstrf/

使用JQuery查找一个人是否未满18岁

1 个答案: