如何正确构建带有 AngularJS 标签的无线电输入指令? [英] How do I properly build an AngularJS labeled radio input directive?
问题描述
我意识到 AngularJS 已经有一个 input[radio] 指令,我想尽可能多地利用它.
我在这里创建了一个 JSFiddle,但我不知道如何获得 ng-模型属性才能正常工作.我正在选择每个收音机,但 selectedValue 不会改变.
另外,请告诉我我在这里做错了什么.我相信我可以做一些其他的改进.
HTML:
JavaScript:
angular.module('app', []).controller('controller', function($scope) {$scope.selectedValue = 'FOO';$scope.radios = [{标签:'foo',值:'FOO'},{标签:'bar',值:'BAR'}];}).directive('labeledRadio', function(){返回 {要求:['ngModel','值'],限制:'A',替换:真的,模板: ['<label class="radio">',' <input class="radio__input" type="radio" data-ng-model="ngModel" name="{{name}}" value="{{value}}">',' <span class="radio__label">{{label}}</span>','</标签>'].加入(''),范围: {ngModel: '=',标签: '@',姓名: '@',价值: '@'}}});
解决方案 由于原型继承在 JavaScript 中的工作方式,您不能在 2 路数据绑定的作用域上使用原语.因此,解决此问题的方法是将 selectedValue
更改为对象...
angular.module('app', []).controller('controller', function($scope) {$scope.selectedValue = { value: 'FOO' };$scope.radios = [{标签:'foo',值:'FOO'},{标签:'bar',值:'BAR'}];})<div data-ng-controller="控制器">
小提琴:http://jsfiddle.net/gdnKW/
有关完整说明,请参见此处:https://github.com/angular/angular.js/wiki/Understanding-Scopes
I realize that AngularJS already has an input[radio] directive and I want to leverage that as much as possible.
I created a JSFiddle here, but I can't figure out how to get the ng-model property to work properly. I'm selecting each radio, but the selectedValue doesn't change.
Also, please tell me anything that I'm doing wrong here. I'm sure I could make some other improvements.
The HTML:
<div data-ng-controller="controller">
<div
data-ng-repeat="radio in radios"
data-ng-model="selectedValue"
data-name="radio1"
data-label="{{radio.label}}"
data-value="{{radio.value}}"
data-labeled-radio></div>
<br>
selected value: {{selectedValue}}
</div>
The JavaScript:
angular.module('app', [])
.controller('controller', function($scope) {
$scope.selectedValue = 'FOO';
$scope.radios = [
{ label: 'foo', value: 'FOO' },
{ label: 'bar', value: 'BAR' }
];
})
.directive('labeledRadio', function(){
return {
require: ['ngModel', 'value'],
restrict: 'A',
replace: true,
template: [
'<label class="radio">',
' <input class="radio__input" type="radio" data-ng-model="ngModel" name="{{name}}" value="{{value}}">',
' <span class="radio__label">{{label}}</span>',
'</label>'
].join(''),
scope: {
ngModel: '=',
label: '@',
name: '@',
value: '@'
}
}
});
解决方案 Because of the way prototypal inheritance works in JavaScript, you can't use primatives on the scope for 2-way databinding. Therefore the way to fix this is to change selectedValue
to an object...
angular.module('app', [])
.controller('controller', function($scope) {
$scope.selectedValue = { value: 'FOO' };
$scope.radios = [
{ label: 'foo', value: 'FOO' },
{ label: 'bar', value: 'BAR' }
];
})
<div data-ng-controller="controller">
<div
data-ng-repeat="radio in radios"
data-ng-model="selectedValue.value"
data-name="radio1"
data-label="{{radio.label}}"
data-value="{{radio.value}}"
data-labeled-radio></div>
<br>
selected value: {{selectedValue.value}}
</div>
Fiddle: http://jsfiddle.net/gdnKW/
For a full explanation, see here: https://github.com/angular/angular.js/wiki/Understanding-Scopes
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