AngularJS - 输入radio默认为null或空白

Question

这很好用，除了我不能将var1初始化为＆＃34;＆＃34;或者为null。我喜欢＆＃34; All＆＃34;要选择的项目，但它似乎没有注册为＆＃34; All＆＃34;通过ng值。点击该值后，它似乎有效。

angular.module('myApp', []);  
angular.module('myApp').controller('test_controller1', function($scope) {
  $scope.colors = [ "red", "green", "blue" ];
  $scope.var1 = "";
});

...

<input type="radio" ng-model="var1" ng-value="" id="all"> <label for="all">All</label> 
<input type="radio" ng-model="var1" ng-value="'red'" id="red_id"> <label for="red_id">red</label> 
<input type="radio" ng-model="var1" ng-value="'green'" id="green_id"> <label for="green_id">green</label> 
<input type="radio" ng-model="var1" ng-value="'blue'" id="blue_id"> <label for="blue_id">blue</label> 

https://plnkr.co/edit/UyaKv2UFpWOyoMvpuDE9?p=preview

Answer 1

刚刚意识到ng-value =“''”按我喜欢的方式工作。没关系。