角度js下拉默认值
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【中文标题】角度js下拉默认值【英文标题】：angular js dropdown default value 【发布时间】：2020-07-30 03:44:06 【问题描述】：那么在以下脚本中，我们如何将“CAR1”设置为下拉列表的默认值？ 非常感谢提前
</script>
<body>
<div ng-app="myApp" ng-controller="myCtrl">
<p>Select a car:</p>
<select ng-model="selectedCar" ng-options="x for (x, y) in cars">
</select>
<h1>You selected: selectedCar.brand</h1>
<h2>Model: selectedCar.model</h2>
<h3>Color: selectedCar.color</h3>
<p>Note that the selected value represents an object.</p>
</div>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope)
$scope.cars =
car01 : brand : "Ford", model : "Mustang", color : "red",
car02 : brand : "Fiat", model : "500", color : "white",
car03 : brand : "Volvo", model : "XC90", color : "black"
);
</script><script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.6.9/angular.min.js"></script>【问题讨论】：
【参考方案1】：<select ng-init="selectedCar = cars.car01" ng-model="selectedCar" ng-options="x for (x, y) in cars">
</select>
使用ng-init并将默认值赋给ng-model变量selectedCar
【讨论】：
【参考方案2】：在分配选项后设置您的默认值。像这样设置默认值$scope.selectedCar = $scope.cars.car01;。我也更新了代码。
</script>
<body>
<div ng-app="myApp" ng-controller="myCtrl">
<p>Select a car:</p>
<select ng-model="selectedCar" ng-options="x for (x, y) in cars">
</select>
<h1>You selected: selectedCar.brand</h1>
<h2>Model: selectedCar.model</h2>
<h3>Color: selectedCar.color</h3>
<p>Note that the selected value represents an object.</p>
</div>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope)
$scope.cars =
car01 : brand : "Ford", model : "Mustang", color : "red",
car02 : brand : "Fiat", model : "500", color : "white",
car03 : brand : "Volvo", model : "XC90", color : "black"
$scope.selectedCar = $scope.cars.car01; // set here
);
</script><script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.6.9/angular.min.js"></script>【讨论】：
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