Angular2:克隆组件/ HTML元素及其功能 [英] Angular2: Cloning component / HTML element and it's functionality
问题描述
所以,问题相当简单......
So, the question is fairly simple...
我有一张桌子和一些角度逻辑(计算样式等)...具体来说我有这个THs
I have a table and some angular logic on it (calculating styles, etc)... specifically I have this on THs
[class.hidden] = "column.group !== 'key-data' && currentTableView !== column.group"
对于我的表粘贴标题功能,我需要克隆表和位置它修复..使用指令,做类似这样的事情(简化)
For my table sticky headers functionality I need to clone the table and position it fixed.. using a directive, that does something like this (simplified)
let newTable = element.cloneNode(true);
body.appendChild(newTable);
显然角度逻辑不适用于newTable,但我希望它是......
obviously the angular logic is not applied to the newTable, but I want it to be...
我该怎么做?
推荐答案
所以我做了一些研究这就是我想出来的。
So I did some research and this is what I came up with.
你可以这样做,使用模板和 [ngTemplateOutlet]
实际上并不难。这就是它的工作原理:
You can do it and it isn't actually that hard using templates and the [ngTemplateOutlet]
. This is how it works:
@Component({
selector: 'my-app',
template: `
<template #temp>
<h1 [ngStyle]="{background: 'green'}">Test</h1>
<p *ngIf="bla">Im not visible</p>
</template>
<template [ngTemplateOutlet]="temp"></template>
<template [ngTemplateOutlet]="temp"></template>
`
})
export class AppComponent {
bla: boolean = false;
@ContentChild('temp') testEl: any;
}
因此,您创建一个参考模板,在其中添加所有逻辑,然后你只需使用 [ngTemplateOutlet]
创建尽可能多的模板副本。保留所有内部绑定和角度功能。
So you create a reference template, add all of your logic inside of it, and then you just create as many copies of the template using the [ngTemplateOutlet]
. All of the inner bindings and angular functionality is retained.
以下是一名工作人员:
http://plnkr.co/edit/jPt5eKUfLUe9FxnLH8bL?p=preview
当你可以看到我用 * ngIf
和 [ngStyle]
进行了测试,它们按预期工作,但我没有看到为什么任何其他类型的指令不起作用的任何原因。
As you can see I've tested it with *ngIf
and [ngStyle]
and they work as expected and I don't see any reason why any other kind of directive wouldn't work.
你甚至可以使用 * ngFor
但是你需要提供 [ngOutletContext]
。
我已经在我正在处理的库中完成了这个,你可以在这里看到一个例子:
You can even use *ngFor
but then you need to provide the [ngOutletContext]
.
I've done that in a library I'm working on you can see an example here:
https://github.com/flauc/ng2-simple-components/blob/master /src/select/select.component.ts
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