Please ensure that the subscription data is fully loaded before utilizing it as input

Recently, I have been developing a service that retrieves a list of users to be used as input for a child component. However, I encountered an issue where the component loads before the users list is fully loaded. One solution I came up with is to implement the *ngIf directive to check if the array is not null. Despite this workaround, I am curious to know if there is a better approach to achieve the desired outcome. Below is a snippet of my code:

private fetchUsersList(): void {
    this.usersService.getUsers().subscribe((response: any[]) => {
        this.usersList = response;
    });
}

Here is my corresponding HTML code snippet:

<users-grid 
    *ngIf="usersList"
    [data]="usersList">
</users-grid>

Answer №1

Utilizing the async pipe in Angular

TypeScript:

private fetchUserList(): void {
    this.usersList = this.usersService.retrieveUsers();    
}; 

HTML:

<app-user-grid *ngIf="usersList | async; let userList"
      [data]="userList">
</app-user-grid>

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