这似乎牢不可破。

// Prevent NULL input and replace text.
$(document).on('change', 'input[type="number"]', function (event) {
    this.value = this.value.replace(/[^0-9\.]+/g, '');
    if (this.value < 1) this.value = 0;
});

// Block non-numeric chars.
$(document).on('keypress', 'input[type="number"]', function (event) {
    return (((event.which > 47) && (event.which < 58)) || (event.which == 13));
});

下面是我使用的函数:

// Numeric only control handler
jQuery.fn.ForceNumericOnly =
function()
{
    return this.each(function()
    {
        $(this).keydown(function(e)
        {
            var key = e.charCode || e.keyCode || 0;
            // allow backspace, tab, delete, enter, arrows, numbers and keypad numbers ONLY
            // home, end, period, and numpad decimal
            return (
                key == 8 || 
                key == 9 ||
                key == 13 ||
                key == 46 ||
                key == 110 ||
                key == 190 ||
                (key >= 35 && key <= 40) ||
                (key >= 48 && key <= 57) ||
                (key >= 96 && key <= 105));
        });
    });
};

然后，您可以通过以下操作将其附加到控件:

$("#yourTextBoxName").ForceNumericOnly();

我想出了一个非常好的简单的解决方案，它不会像其他解决方案那样阻止用户选择文本或复制粘贴。jQuery样式:)

$("input.inputPhone").keyup(function() {
    var jThis=$(this);
    var notNumber=new RegExp("[^0-9]","g");
    var val=jThis.val();

    //Math before replacing to prevent losing keyboard selection 
    if(val.match(notNumber))
    { jThis.val(val.replace(notNumber,"")); }
}).keyup(); //Trigger on page load to sanitize values set by server

尝试在HTML代码中，它自己像onkeypress和onpast

<input type="text" onkeypress="return event.charCode >= 48 && event.charCode <= 57" onpaste="return false">

这是我用来验证整数或浮点值的数字输入(不显眼的jQuery风格):

$('input[name="number"]').keyup(function(e) { var float = parseFloat($(this).attr('data-float')); /* 2 regexp for validating integer and float inputs ***** > integer_regexp : allow numbers, but do not allow leading zeros > float_regexp : allow numbers + only one dot sign (and only in the middle of the string), but do not allow leading zeros in the integer part *************************************************************************/ var integer_regexp = (/[^0-9]|^0+(?!$)/g); var float_regexp = (/[^0-9\.]|^\.+(?!$)|^0+(?=[0-9]+)|\.(?=\.|.+\.)/g); var regexp = (float % 1 === 0) ? integer_regexp : float_regexp; if (regexp.test(this.value)) { this.value = this.value.replace(regexp, ''); } }); <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <input type="text" data-float="1" id="number" name="number" placeholder="integer"> <input type="text" data-float="0.1" id="number" name="number" placeholder="float">

$(document).on("keypress", ".classname", function(evt) {
    evt = (evt) ? evt : window.event;
    var charCode = (evt.which) ? evt.which : evt.keyCode;
    if (charCode > 31 && (charCode < 48 || charCode > 57)) {
        return false;
    }
    return true;
});