[英]Angular *ngIf async as variable with multiple condition on same level not working
我正在尝试重构我的代码
<ng-container *ngIf='taskOutputs$ | async as taskOutputs && taskOutputs.outputs.length; else neverImportedOrLoading'>
我得到了Unexpected token &&, expected identifier
我应该绝对将其拆分为子ng-container
HTML 项目吗? 像下面这样?
<ng-container *ngIf='taskOutputs$ | async as taskOutputs && taskOutputs.outputs.length; else neverImportedOrLoading'>
<ng-container taskOutputs.outputs.length; else neverImportedOrLoading'>
</ng-container>
</ng-container>
编辑
这样做(添加()
)
<ng-container *ngIf='(taskOutputs$ | async as taskOutputs) && taskOutputs.outputs.length; else neverImportedOrLoading'>
得到另一个错误:
Missing expected ) at column 23 in [(taskOutputs$ | async as taskOutputs) && taskOutputs.outputs.length; else neverImportedOrLoading]
我建议使用两个 ng-container
<ng-container *ngIf='{tasks:taskOutputs$ | async} as data'>
<ng-container *ngIf="data.tasks && data.tasks.length else neverImportedOrLoading">
...see that you need use data.tasks.., e.g.
<div *ngFor="let task of data.tasks">
{{task.taskId}}
</div>
</ng-container>
</ng-container>
看到第一个条件{task:taskOutputs$|async}
它总是满足
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