无法绑定到"aria-valuenow"，因为它不是"div"的已知属性 [英] Can't bind to 'aria-valuenow' since it isn't a known property of 'div'

问题描述

以下代码有什么问题? 当我尝试将表达式分配给元素时，对我产生了冲击，

What's wrong with the following code? Hapenned to me when I tried to assign an expression to an element,

<div class="progress-bar progress-bar-striped active" role="progressbar"
  aria-valuenow="{{MY_PREC}}" aria-valuemin="0" aria-valuemax="100" >
    {{MY_PREC}}
  </div>

也尝试过

[aria-valuenow]={{MY_PREC}}

似乎自RC5起就发生了

Seem like it happens since RC5

有什么想法吗?

推荐答案

默认情况下，Angular2绑定是属性绑定.如果没有应用具有这样的@Input()

Angular2 binding is property binding by default. There is no aria-valuenow property on div if there is no directive or component applied that has such an @Input()

使用显式属性绑定

attr.aria-valuenow="{{MY_PREC}}" 

或

[attr.aria-valuenow]="MY_PREC" 

这篇关于无法绑定到"aria-valuenow"，因为它不是"div"的已知属性的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！