How do I get the data from my component into html in Angular before the page gets displayed?

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I am trying to display values retrieved from my api in the component. By the time the API responds with the data, my page is getting displayed and I am never able to show the list of elements. Could you let me know how I can solve this and display the values in my html page?

Here is my api call

public searchTeamInfo(term: string): Observable<TeamInfo> {

        return this.http.get<TeamInfo>(`/api/${term}`);
    }

I am calling the api in my component.

 public associatedPodNames: Array<TeamInfo>;
 associatedTeamIds: [
                            "12345",
                            "45454",
                            "43543543"
                        ]

ngOnInit() {
             this.getTeamInfo();
            }

public getTeamInfo(): Array<IPodDetails> {
     for (let i = 0; i < this.associatedTeamIds.length; i++) {
    this.searchService.searchTeamInfo(this.associatedTeamIds[i]).subscribe(res => {
                                    this.associatedPodNames.push(res);
                                    console.log(this.associatedPodNames);

                                 },
                            );
                       }

            }

I am trying to display the values in my html page using the below code.

<ng-container *ngFor="let pods of associatedPodNames">
    pods
</ng-container>

I am able to see result in my console, the list of associatedPodNames. Here is the sample result.

[{podId: "12345", podName: "sample1", podType: "Project Pod"},
{podId: "45454"podName: "sample2"podType: "Project Pod"},
{podId: "43543543", podName: "sample3", podType: "Delivery Pod"}]

The associatedPodnames shows as empty even though I see the pod information in the console. How do I fix this?

You need to use double curly braces like this : {{ pods.property }} to bind one way content

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You have pods referring to each object within the container. You need an angular expression {{ }} within the container to display output values:

<ng-container *ngFor="let pods of associatedPodNames">
    <p>{{pods.podName}}</p>
</ng-container>

Displaying data in views, The HTML template associated with a component provides the means to The process of combining data values with their representation on the page is called data binding. Before you read the complete template syntax guide, the exercises on this template: ` <h1>{{title}}</h1> <h2>My favorite hero is: {{ myHero}}</h2>� Im very new to Angular 2 so bear with me. Im trying to get a new component to appear in the index.html page. The file set is from the basic quick start files from GitHub. I created a new component

if you want to render the results you need to use the JSON pipe and you need to use {{}} to bind your data.

The JSON pipe will show the entire structure of the object on your HTML e.g

<ng-container *ngFor="let pods of associatedPodNames">
    {{pods | json}}
</ng-container>

or

use the properties of the object:

<ng-container *ngFor="let pods of associatedPodNames">
    {{pods.podId}}
</ng-container>

You can use any property you want to display that is inside of the Object you want to render

Angular Docs https://angular.io/guide/displaying-data

FYI there are several way to bind data into your HTML

Property Binding,Event Binding and Two-Way Data Binding.

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 associatedTeamIds: [
                            "12345",
                            "45454",
                            "43543543"
                        ]

ngOnInit() {
             this.getTeamInfo();
            }

public getTeamInfo(): Array<IPodDetails> {
     for (let i = 0; i < this.associatedTeamIds.length; i++) {
    this.searchService.searchTeamInfo(this.associatedTeamIds[i]).subscribe(res => {
                                    this.associatedPodNames = this.associatedPodNames.concat(res);
                                    console.log(this.associatedPodNames);

                                 },
                            );
                       }

            }

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Sending a Request and Processing a Mapped Response to , Angular is a JavaScript framework that allows you to be able to Angular 7 is entirely based on components. Before getting started with the guide, I will let you know we are using data binding is a simple, one-way communication where the HTML I have named my project ResponseData_Binding. 2. Don't use DOM references before they exist (@ViewChild) With the help of the @ViewChild decorator, angular makes it very easy to reference specific child elements (html nodes or components) of your component. All you need to do is to add a reference identifier to the node or component inside of your template.

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Comments
  • Try {{pods.podName}} within the container.
  • Hi Andy, Thank you for replying. I understand the display part. Sorry for not being clear. My issue is with the associatedPodnames. It always shows as empty instead of the result from the API. I can see it in console. But it just that it does not get the value html. Looks like the page is being rendered even before the value is set in component. I need help on getting the associatePodNames get the data from the component into my html page.
  • Hi Patricio, Thank you for replying. I understand the display part. Sorry for not being clear. My issue is with the associatedPodnames. It always shows as empty instead of the result. I can see it in console. But it just that it does not display in html. Looks like the page is being displayed even before the value is set in component. I need help on getting the associatePodNames getting the data in my html page.
  • you can do that different ways you can use the async pipe or you can have an *ngIf checking if the value of the array is bigger than 0. If this doesn't work take a look to the ngAfterOnInit() lifecycle