javascript AngularJS Select 元素设置选中索引
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AngularJS Select element set the selected index
提问by ErikBrandsma
So i'm using angular and this is my select html:
所以我使用 angular，这是我选择的 html：
<select id="date" ng-model="selectedDay" ng-change="setDate()" >
<option>another option</option>
<option>an option</option>
</select>
this is in my controller:
这是在我的控制器中：
$scope.selectedDay;
document.getElementById("date").selectedIndex = "0";
The result:Three options: one blank (which is default selected) and then the two options I made in html
结果：三个选项：一个空白（默认选中），然后是我在 html 中所做的两个选项
What the hell? why isn't the default when i open the view "another option"
我勒个去？为什么当我打开视图“另一个选项”时不是默认值
回答by Nano
Firstly, always check the official documentation. AngularJs is well documented.
首先，请务必查看官方文档。AngularJs 有据可查。
Secondly, do not use document.getElementById ("date") selectedIndex = "0"- that's javascript. Avoid using pure Javascript when an Angular function is available.
其次，不要使用document.getElementById ("date") selectedIndex = "0"- 那是 javascript。当 Angular 函数可用时，避免使用纯 Javascript。
Documentation:
文档：
https://docs.angularjs.org/api/ng/directive/select
https://docs.angularjs.org/api/ng/directive/select
