缺少在angular2(2种差异方式)文档中访问本机元素的正确方法是什么 [英] What's the proper way of accessing native element in angular2 (2 diff ways) docs are scarce
问题描述
在angular2中访问本机元素的正确方法是什么(2种比较方式) 所以我看过使用以下代码的代码:
What's the proper way of accessing native element in angular2 (2 diff ways) so I have seen code that uses:
constructor(ele: ElementRef) {
let myEl = ele.nativeElement;
// do some work on myEl such as jQuery(myEl).hide()
...
以及通过BrowserDomAdapter使用本机dom的代码:
As well as code that uses native dom via BrowserDomAdapter:
constructor(viewContainer:ViewContainerRef) {
let dom = new BrowserDomAdapter();
let el = viewContainer.element.nativeElement;
let myEle = dom.getElementsByClassName(el, element)[0];
// or jQuery(myEle).hide()
...
我想知道什么是Pro/Cons和正确"的做事方式. 不幸的是，文档似乎仍然稀缺.
I am wondering what's the Pro / Cons and "proper" way of doing things. Unfortunately, the docs seem scarce still.
我假设后者会通过该界面为WebWorkers提供支持，但这只是我的假设.
I am assuming the latter will give you WebWorkers support through the interface, but it is just my assumption.
推荐答案
<div #foo>
@ViewChild() foo;
ngAfterViewInit(){
foo.nativeElement...
}
或已被排除
@ContentChild() foo;
ngAfterContentInit(){
foo.nativeElement...
}
允许按模板变量或组件或指令类型选择元素. (使用类型，您将获得组件实例而不是元素实例.
Allow to pick elements by template variable or component or directive type. (with a type you'll get the component instance instead of the element though.
或
constructor(@ViewChildren('foo') elements) {...
constructor(@ContentChildren('foo') elements) {...
@ViewChild提供实时视图，以匹配具有更改订阅的元素.
@ViewChild provides a live view to matching elements with changes subscription.
另请参见
- What's the difference between @ViewChild and @ContentChild?
- angular 2 / typescript : get hold of an element in the template
这篇关于缺少在angular2(2种差异方式)文档中访问本机元素的正确方法是什么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！
