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我有一个简单的组件,其属性为userFirstName
。Angular4:数据绑定仅在初始化之前工作
现在我只想显示此属性。我已经做了一个简单的绑定,并且我在构造函数中初始化了userFirstName
,但它只有在它是第一个命令时才起作用!
所以这工作正常:它显示“用户名”文本。
this.userFirstName = "User Name";
this.loggedIn = localStorage.getItem("currentUser")!=null;
var currentUser = localStorage.getItem('currentUser');
let user:User = JSON.parse(currentUser) ;
this.userFirstName = localStorage.getItem('currentUser');
现在,如果我把this.userFirstName = "User Name";
在最后,它不起作用。
所以这不起作用它显示空字符串!
this.loggedIn = localStorage.getItem("currentUser")!=null;
var currentUser = localStorage.getItem('currentUser');
let user:User = JSON.parse(currentUser) ;
this.userFirstName = localStorage.getItem('currentUser');
this.userFirstName = "User Name";
下面是相应的HTML:
<div>
<a >Hello {{userFirstName}} ! </a>
//some content
</div>