我正在创建一个网页,其中我有一个输入文本字段,我想只允许数字字符,如(0,1,2,3,4,5…9)0-9。
我如何使用jQuery做到这一点?
我正在创建一个网页,其中我有一个输入文本字段,我想只允许数字字符,如(0,1,2,3,4,5…9)0-9。
我如何使用jQuery做到这一点?
当前回答
用这种形式。在我看来,允许home, end, shift和ctrl这样的键是正确的,缺点是用户可以打印特殊字符:
$("#busca_cep").keydown(function(event) {
if ( event.keyCode == 46 || event.keyCode == 8 || event.keyCode == 13 || event.keyCode == 16 || event.keyCode == 36 || event.keyCode == 35) {
if (event.keyCode == 13) {
localiza_cep(this.value);
}
} else {
if ((event.keyCode < 48 || event.keyCode > 57) && (event.keyCode < 96 || event.keyCode > 105 )) {
event.preventDefault();
}
}
});
其他回答
最简单的解决方案是在你的html表单代码中添加:
<input type="number"
如果是php表单,则添加:
$data = array(
'type' => 'number',
两者都是
停止用户输入逗号 停止用户粘贴逗号(它粘贴数字但去掉逗号)
在document.ready中添加以下代码
$('.class of text box').keyup(function ()
{
this.value = this.value.replace(/[^0-9]/g, '');
});
$(document).ready(function() {
$("#txtboxToFilter").keydown(function(event) {
// Allow only backspace and delete
if ( event.keyCode == 46 || event.keyCode == 8 ) {
// let it happen, don't do anything
}
else {
// Ensure that it is a number and stop the keypress
if (event.keyCode < 48 || event.keyCode > 57 ) {
event.preventDefault();
}
}
});
});
来源:http://snipt.net/GerryEng/jquery-making-textfield-only-accept-numeric-values
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">
function validate_profile(frmid) {
var form = $('#' + frmid);
var error = $('.alert-danger', form);
var success = $('.alert-success', form);
form.validate({
errorElement: 'span', //default input error message container
errorClass: 'help-block', // default input error message class
focusInvalid: true, // do not focus the last invalid input
ignore: "",
rules: {
contact_no: {
required: true,
minlength: 10,
maxlength: 10,
number: true
}, email_id: {
required: true,
email: true
}
},
invalidHandler: function (event, validator) { //display error alert on form submit
success.hide();
error.show();
Metronic.scrollTo(error, -7000);
},
highlight: function (element) { // hightlight error inputs
$(element)
.closest('.form-group').addClass('has-error'); // un set error class to the control group
$(element)
.closest('.form-group').removeClass('has-success'); // set success class to the control group
},
unhighlight: function (element) { // revert the change done by hightlight
$(element)
.closest('.form-group').removeClass('has-error'); // un set error class to the control group
$(element)
.closest('.form-group').addClass('has-success'); // set success class to the control group
error.hide();
},
success: function (label) {
label.closest('.form-group').removeClass('has-error');
label.closest('.form-group').addClass('has-success');
},
submitHandler: function (form) {
success.show();
error.hide();
form.submit();
}
});
}