Javascript angularjs:只允许在文本框中键入数字
angularjs中是否有任何功能只允许在文本框中键入数字此功能正是您所需要的 编辑: 您可以将jquery插件包装到指令中。我在这里创建了一个示例: HTML: JS:Javascript angularjs:只允许在文本框中键入数字,javascript,ruby-on-rails,angularjs,numeric,Javascript,Ruby On Rails,Angularjs,Numeric,angularjs中是否有任何功能只允许在文本框中键入数字此功能正是您所需要的 编辑: 您可以将jquery插件包装到指令中。我在这里创建了一个示例: HTML: JS: 此代码显示了如何防止输入非数字符号的示例 angular.module('app'). directive('onlyDigits', function () { return { restrict: 'A', require: '?ngModel', link:
此代码显示了如何防止输入非数字符号的示例
angular.module('app').
directive('onlyDigits', function () {
return {
restrict: 'A',
require: '?ngModel',
link: function (scope, element, attrs, modelCtrl) {
modelCtrl.$parsers.push(function (inputValue) {
if (inputValue == undefined) return '';
var transformedInput = inputValue.replace(/[^0-9]/g, '');
if (transformedInput !== inputValue) {
modelCtrl.$setViewValue(transformedInput);
modelCtrl.$render();
}
return transformedInput;
});
}
};
});
以安东的回答为基础--
angular.module(“app”)指令(“onlyDigits”,函数()
{
返回{
限制:“EA”,
要求:“?ngModel”,
范围:{
allowDecimal:“@”,
allowNegative:“@”,
米努姆:“@”,
maxNum:“@”
},
链接:功能(范围、元素、属性、模型)
{
如果(!ngModel)返回;
ngModel.$parsers.unshift(函数(inputValue)
{
var decimalFound=假;
变量位数=inputValue.split(“”).filter(函数,i)
{
变量b=(!isNaN(s)和&s!=”);
如果(!b&&attrs.allowDecimal&&attrs.allowDecimal==“true”)
{
如果(s==”&&decimalFound==false)
{
小数=真;
b=正确;
}
}
如果(!b&&attrs.allowNegative&&attrs.allowNegative==“true”)
{
b=(s='-'&&i==0);
}
返回b;
}).加入(“”);
if(attrs.maxNum&&!isNaN(attrs.maxNum)&&parseFloat(数字)>parseFloat(attrs.maxNum))
{
数字=attrs.maxNum;
}
if(attrs.minNum&&!isNaN(attrs.minNum)&&parseFloat(数字)
HTML
//类型:123或123.45
.directive('onlyDigits', function () {
return {
require: 'ngModel',
restrict: 'A',
link: function (scope, element, attr, ctrl) {
function inputValue(val) {
if (val) {
var digits = val.replace(/[^0-9.]/g, '');
if (digits.split('.').length > 2) {
digits = digits.substring(0, digits.length - 1);
}
if (digits !== val) {
ctrl.$setViewValue(digits);
ctrl.$render();
}
return parseFloat(digits);
}
return undefined;
}
ctrl.$parsers.push(inputValue);
}
};
});
我只是在指令中使用了ng键来输入 HTML: 你可以查一下
这是最简单、最快的方法,只允许数字输入
<input type="text" id="cardno" placeholder="Enter a Number" onkeypress='return event.charCode >= 48 && event.charCode <= 57' required>
谢谢这是适合我的方法。它基于,但允许使用
输入提交表单,使用向上
和向下
箭头增加和减少数字,使用删除
编辑,退格
,左
和右
,以及使用选项卡
浏览各个字段。请注意,它适用于正整数,如金额
HTML:
我也有过类似的问题,最后我和这件事发生了联系
ng-change="changeCount()"
然后:
因此,如果插入了无效的数字,则用户默认为1。基于djsiz解决方案,包装在指令中。
注意:它不会处理数字,但可以轻松更新
angular
.module("app")
.directive("mwInputRestrict", [
function () {
return {
restrict: "A",
link: function (scope, element, attrs) {
element.on("keypress", function (event) {
if (attrs.mwInputRestrict === "onlynumbers") {
// allow only digits to be entered, or backspace and delete keys to be pressed
return (event.charCode >= 48 && event.charCode <= 57) ||
(event.keyCode === 8 || event.keyCode === 46);
}
return true;
});
}
}
}
]);
angular
.模块(“应用程序”)
.指令(“mwInputRestrict”[
函数(){
返回{
限制:“A”,
链接:函数(范围、元素、属性){
元素打开(“按键”,功能(事件){
如果(attrs.mwInputRestrict==“onlynumbers”){
//只允许输入数字,或按退格键和删除键
return(event.charCode>=48&&event.charCode我的解决方案接受复制和粘贴并保存插入符号的位置。它用于产品成本,因此只允许正十进制值。可以很容易地进行重构,以允许负数或整数
angular
.module("client")
.directive("onlyNumber", function () {
return {
restrict: "A",
link: function (scope, element, attr) {
element.bind('input', function () {
var position = this.selectionStart - 1;
//remove all but number and .
var fixed = this.value.replace(/[^0-9\.]/g, '');
if (fixed.charAt(0) === '.') //can't start with .
fixed = fixed.slice(1);
var pos = fixed.indexOf(".") + 1;
if (pos >= 0) //avoid more than one .
fixed = fixed.substr(0, pos) + fixed.slice(pos).replace('.', '');
if (this.value !== fixed) {
this.value = fixed;
this.selectionStart = position;
this.selectionEnd = position;
}
});
}
};
});
放在html页面上:
<input type="text" class="form-control" only-number ng-model="vm.cost" />
您可以这样做:
对RegExp“/^[0-9]+$/”使用ng模式,这意味着只有整数有效
<form novalidate name="form">
<input type="text" data-ng-model="age" id="age" name="age" ng-pattern="/^[0-9]+$/">
<span ng-show="form.age.$error.pattern">The value is not a valid integer</span>
</form>
该值不是有效的整数
只需使用HTML5即可
<input type="number" min="0"/>
我在
.directive('numbersCommaOnly',function(){
返回{
要求:'ngModel',
链接:功能(范围、元素、属性、模型){
on('keydown',函数(事件){
//允许:退格、删除、制表符、转义、输入和。
var array2=[46,8,9,27,13,110,190]
if(array2.indexOf(event.which)!=-1||
//允许:Ctrl+A
(event.which==65&&event.ctrlKey==true)||
//允许:Ctrl+C
(event.which==67&&event.ctrlKey==true)||
//允许:Ctrl+X
(event.which==88&&event.ctrlKey==true)||
//允许:起始、结束、左、右
(event.which>=35&&event.which此解决方案将只接受数字“.”和“-”
这也限制了文本框中的空格输入。我已经使用该指令实现了同样的功能
请提供以下工作示例的解决方案
HTML:
使用ng only number
仅允许数字,例如:
<input type="text" ng-only-number data-max-length=5>
它简单易懂。
只要复制粘贴此代码,您的问题就会得到解决。对于更多条件,只需更改模式中的值。您的工作就完成了
<input type="text" pattern="[0-9]{0,}" oninvalid="this.setCustomValidity('Please enter only numeric value. Special character are not allowed.')" oninput="setCustomValidity('')">
//内部控制
<input ng-keypress="onlyNumbers($event)" min="0" type="number" step="1" ng-pattern="/^[0-9]{1,8}$/" ng-model="... >
$scope.onlyNumbers = function(event){
var keys={
'up': 38,'right':39,'down':40,'left':37,
'escape':27,'backspace':8,'tab':9,'enter':13,'del':46,
'0':48,'1':49,'2':50,'3':51,'4':52,'5':53,'6':54,'7':55,'8':56,'9':57
};
for(var index in keys) {
if (!keys.hasOwnProperty(index)) continue;
if (event.charCode==keys[index]||event.keyCode==keys[index]) {
return; //default event
}
}
event.preventDefault();
};
ng-change="changeCount()"
self.changeCount = function () {
if (!self.info.itemcount) {
self.info.itemcount = 1;
}
};
angular
.module("app")
.directive("mwInputRestrict", [
function () {
return {
restrict: "A",
link: function (scope, element, attrs) {
element.on("keypress", function (event) {
if (attrs.mwInputRestrict === "onlynumbers") {
// allow only digits to be entered, or backspace and delete keys to be pressed
return (event.charCode >= 48 && event.charCode <= 57) ||
(event.keyCode === 8 || event.keyCode === 46);
}
return true;
});
}
}
}
]);
<input type="text"
class="form-control"
id="inputHeight"
name="inputHeight"
placeholder="Height"
mw-input-restrict="onlynumbers"
ng-model="ctbtVm.dto.height">
angular
.module("client")
.directive("onlyNumber", function () {
return {
restrict: "A",
link: function (scope, element, attr) {
element.bind('input', function () {
var position = this.selectionStart - 1;
//remove all but number and .
var fixed = this.value.replace(/[^0-9\.]/g, '');
if (fixed.charAt(0) === '.') //can't start with .
fixed = fixed.slice(1);
var pos = fixed.indexOf(".") + 1;
if (pos >= 0) //avoid more than one .
fixed = fixed.substr(0, pos) + fixed.slice(pos).replace('.', '');
if (this.value !== fixed) {
this.value = fixed;
this.selectionStart = position;
this.selectionEnd = position;
}
});
}
};
});
<input type="text" class="form-control" only-number ng-model="vm.cost" />
<form novalidate name="form">
<input type="text" data-ng-model="age" id="age" name="age" ng-pattern="/^[0-9]+$/">
<span ng-show="form.age.$error.pattern">The value is not a valid integer</span>
</form>
<input type="number" min="0"/>
.directive('numbersCommaOnly', function(){
return {
require: 'ngModel',
link: function (scope, element, attrs, ngModel) {
element.on('keydown', function(event) {
// Allow: backspace, delete, tab, escape, enter and .
var array2 = [46, 8, 9, 27, 13, 110, 190]
if (array2.indexOf(event.which) !== -1 ||
// Allow: Ctrl+A
(event.which == 65 && event.ctrlKey === true) ||
// Allow: Ctrl+C
(event.which == 67 && event.ctrlKey === true) ||
// Allow: Ctrl+X
(event.which == 88 && event.ctrlKey === true) ||
// Allow: home, end, left, right
(event.which >= 35 && event.which <= 39)) {
// let it happen, don't do anything
return;
}
// Ensure that it is a number and stop the keypress
if ((event.shiftKey || (event.which < 48 || event.which > 57)) && (event.which < 96 || event.which > 105)) {
event.preventDefault();
}
});
}
};
})
<form ng-app="myapp" name="myform" novalidate>
<div ng-controller="Ctrl">
<input name="number" is-number ng-model="wks.number">
<span ng-show="!wks.validity">Value is invalid</span>
</div>
var $scope;
var app = angular.module('myapp', []);
app.controller('Ctrl', function($scope) {
$scope.wks = {number: 1, validity: true}
});
app.directive('isNumber', function () {
return {
require: 'ngModel',
link: function (scope, element, attrs, ngModel) {
element.bind("keydown keypress", function (event) {
if(event.which === 32) {
event.returnValue = false;
return false;
}
});
scope.$watch(attrs.ngModel, function(newValue,oldValue) {
var arr = String(newValue).split("");
if (arr.length === 0) return;
if (arr.length === 1 && (arr[0] == '-' || arr[0] === '.' )) return;
if (arr.length === 2 && newValue === '-.') return;
if (isNaN(newValue)) {
//scope.wks.number = oldValue;
ngModel.$setViewValue(oldValue);
ngModel.$render();
}
});
}
};
});
<input type="text" ng-only-number data-max-length=5>
<input type="text" pattern="[0-9]{0,}" oninvalid="this.setCustomValidity('Please enter only numeric value. Special character are not allowed.')" oninput="setCustomValidity('')">
<input type="text" ng-keypress="checkNumeric($event)"/>
//inside controller
$scope.dot = false
$scope.checkNumeric = function($event){
if(String.fromCharCode($event.keyCode) == "." && !$scope.dot){
$scope.dot = true
}
else if( isNaN(String.fromCharCode($event.keyCode))){
$event.preventDefault();
}
angular.module("app").directive("numbersOnly", function() {
return {
require: "ngModel",
restrict: "A",
link: function(scope, element, attr, ctrl) {
function inputValue(val) {
if (val) {
//transform val to a string so replace works
var myVal = val.toString();
//replace any non numeric characters with nothing
var digits = myVal.replace(/\D/g, "");
//if anything needs replacing - do it!
if (digits !== myVal) {
ctrl.$setViewValue(digits);
ctrl.$render();
}
return parseFloat(digits);
}
return undefined;
}
ctrl.$parsers.push(inputValue);
}
};
});
<input
onkeypress="return (event.charCode >= 48 && event.charCode <= 57) ||
event.charCode == 0 || event.charCode == 46">
$scope.numberOnly="(^[0-9]+$)";
<input type="text" name="rollNo" ng-model="stud.rollNo" ng-pattern="numberOnly" ng-maxlength="10" maxlength="10" md-maxlength="10" ng-required="true" >
<input type="text" ng-keydown="onlyNumbers($event);"/>
$scope.onlyNumbers = function(event){
// 'up': 38,'right':39,'down':40,'left':37,
// 'escape':27,'backspace':8,'tab':9,'enter':13,'del':46,
// '0':48,'1':49,'2':50,'3':51,'4':52,'5':53,'6':54,'7':55,'8':56,'9':57
var keys = { 38:true,39:true,40:true,37:true,27:true,8:true,9:true,13:true,
46:true,48:true,49:true, 50:true,51:true,52:true,53:true,
54:true,55:true,56:true,57:true };
// if the pressed key is not listed, do not perform any action
if(!keys[event.keyCode]) { event.preventDefault(); }
}
<input type="text" (keydown)="onlyNumbers($event);"/>
onlyNumbers(event) { // the logic here }
<input type="phone" numbers-only >