Angular.js - 当 ng-pattern 为 $invalid 时，ng-change 不会触发 [英] Angular.js - ng-change not firing when ng-pattern is $invalid

问题描述

我正在使用 ng-pattern 来验证一些表单字段，并且我正在使用 ng-change 来观察和处理任何更改，但是 ng-change(或 $scope.$watch)只会在表单元素时触发处于 $valid 状态！我是 angular 的新手，所以我不知道如何解决这个问题，尽管我怀疑一个新的指令是要走的路.

如何让 ng-change 在 $invalid 和 $valid 表单元素状态下触发，而 ng-pattern 仍然像以前一样设置表单元素状态?

HTML:

<div ng-controller="控制器"><表格名称=表格"><input type="text" name="textbox" ng-pattern="/^[0-9]+$/" ng-change="change()" ng-model="inputtext">变化:{{变化}}</表单><br>输入任意数量的数字，更改应该会增加.<br><br>现在输入任何不是数字的内容，更改将停止增加.当表单处于 $invalid 状态时，ng-change 不会触发.<br><br>现在删除所有不是数字的字符.它将再次像往常一样递增.当表单处于 $valid 状态时，ng-change 将触发.<br><br>即使表单为 $invalid，我也希望 ng-change 触发.<br><br>form.$valid: <font color="red">{{ form.$valid }}</font>

Javascript:

angular.module('test', []).controller('controller', function ($scope) {$scope.changes = 0;$scope.change = 函数 () {$scope.changes += 1;};});

我创建了一个可用的 JS Fiddle，它显示了我遇到的问题.

http://jsfiddle.net/JAN3x/1/

顺便说一下，这个角度问题似乎也很重要:https://github.com/angular/angular.js/issues/1296

解决方案

Edit 当 ng-model-options 不可用时已回答此问题.请查看最高投票的答案.

您可以编写一个简单的指令来监听 input 事件.

HTML:

<input type="text" name="textbox" ng-pattern="/^[0-9]+$/" watch-change="change()" ng-model="inputtext>变化:{{变化}}

JS:

app.directive('watchChange', function() {返回 {范围: {onchange: '&watchChange'},链接:函数(范围，元素，属性){element.on('输入', function() {范围.$应用(函数(){范围.onchange();});});}};});

http://jsfiddle.net/H2EAB/

I am using ng-pattern to validate some form fields, and I am using ng-change with it to watch and process any changes, however ng-change (or $scope.$watch) will only fire when the form element is in the $valid state! I'm new to angular, so I don't know how to solve this issue, although I suspect a new directive is the way to go.

How can I get ng-change to fire in both $invalid and $valid form element states, with ng-pattern still setting the form element states as before?

Html:

<div ng-app="test">
  <div ng-controller="controller">
    <form name="form">
        <input type="text" name="textbox" ng-pattern="/^[0-9]+$/" ng-change="change()" ng-model="inputtext"> Changes: {{ changes }}
    </form>

    <br>
    Type in any amount of numbers, and changes should increment.

    <br><br>
    Now enter anything that isn't a number, and changes will stop incrementing. When the form is in the $invalid state, ng-change doesn't fire.

    <br><br>
    Now remove all characters that aren't numbers. It will increment like normal again. When the form is in the $valid state, ng-change will fire.

    <br><br>
    I would like ng-change to fire even when the the form is $invalid.

    <br><br>
        form.$valid: <font color="red">{{ form.$valid }}</font>

  </div>
</div>

Javascript:

angular.module('test', []).controller('controller', function ($scope) {
    $scope.changes = 0;
    $scope.change = function () {
        $scope.changes += 1;
    };
});

I have created a working JS Fiddle which shows the problem I am having.

http://jsfiddle.net/JAN3x/1/

By the way, this angular issue also seems to be relevant: https://github.com/angular/angular.js/issues/1296

解决方案

Edit This was answered when ng-model-options was not available. Please see the top-voted answer.

you can write a simple directive to listen input event.

HTML:

<input type="text" name="textbox" ng-pattern="/^[0-9]+$/" watch-change="change()" ng-model="inputtext"> Changes: {{ changes }}

JS:

app.directive('watchChange', function() {
    return {
        scope: {
            onchange: '&watchChange'
        },
        link: function(scope, element, attrs) {
            element.on('input', function() {
                scope.$apply(function () {
                    scope.onchange();
                });
            });
        }
    };
});

http://jsfiddle.net/H2EAB/

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