在ng-template中使用ng-content [英] using ng-content in ng-template
问题描述
是否可以在<ng-template>
内使用<ng-content>
(及其 select 选项),还是仅在组件内工作?
Is it possible to use <ng-content>
(and its select option) inside a <ng-template>
or does it only works within a component ?
<ng-container *ngTemplateOutlet="tpl">
<span greetings>Hello</span>
</ng-container>
<ng-template #tpl>
<ng-content select="[greetings]"></ng-content> World !
</ng-template>
上面的代码只是渲染World !
:(
The above code does just render World !
:(
推荐答案
据我所知,使用ng-content
是不可能的,但是您可以为模板提供参数.因此,可以传递另一个NgTemplate
,它可以再次与原始模板内的NgTemplateOutlet
一起使用.这是一个工作示例:
As far as i know it is not possible using ng-content
, but you can provide parameters to the template. So it's possible to pass another NgTemplate
, which can again be used with an NgTemplateOutlet
inside the original template. Here's a working example:
<ng-container *ngTemplateOutlet="tpl, context: {$implicit: paramTemplate}">
</ng-container>
<ng-template #paramTemplate>
<span>Hello</span>
</ng-template>
<ng-template #tpl let-param>
<ng-container *ngTemplateOutlet="param"></ng-container> World !
</ng-template>
实际上甚至可以将多个模板传递给原始模板:
Actually it is even possible to pass multiple templates to the original template:
<ng-container *ngTemplateOutlet="tpl, context: {'param1': paramTemplate1, 'param2': paramTemplate2}">
</ng-container>
<ng-template #paramTemplate1>
<span>Hello</span>
</ng-template>
<ng-template #paramTemplate2>
<span>World</span>
</ng-template>
<ng-template #tpl let-param1="param1" let-param2="param2">
<ng-container *ngTemplateOutlet="param1"></ng-container>
<ng-container *ngTemplateOutlet="param2"></ng-container>
</ng-template>
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