Angular

Question

我有这个代码：

<ng-container *ngFor="let language of languages">
      <app-fields-to-translate
        *ngIf="language.ID === selectedLanguage.ID"
        [AttributeGroupsCollapses]="AttributeGroupsCollapses"
        [AttributeGroups]="AttributeGroups"
        [Attributes]="Attributes"
        [categoriesCollapsed]="categoriesCollapsed"
        [generalCollabsed]="generalCollabsed"
        [selectedLanguage]="selectedLanguage"
        (CategoriesCollapsedEmmiter)="categoriesCollapsed = $event"
        (CollapseGeneralEmmiter)="generalCollabsed = $event"
        (AddFieldToTranslation)="AddFieldToTranslation($event)"
        (AddAttrubuteToTranslation)="AddAttributeToTranslation($event)"
      >
      </app-fields-to-translate>
    </ng-container>

并且每次selctedLanguage改变（field-to-translate）的组件被销毁我可以阻止这个过程吗？还是有其他方法可以做到这一点？

Answer 1

根据您的业务逻辑具体执行的操作，您可以使用 [hidden]，即

[hidden]="language.ID !== selectedLanguage.ID"

Angular - 如何防止 ngIf 在每次条件改变时销毁组件

Angular - How to prevent ngIf from destroying the component every time the condition changes

angular-ng-if

angular-components