Guide to adding information to a table with the help of an "interface" in Angular 6 and utilizing Typescript

Looking for some guidance with Angular as I am just starting out. I am currently trying to send an API request in angular 6 using Typescript. However, I am facing difficulties when it comes to adding data to a table.

Check out my code on: Codepen

In my project, there is an angular material table that includes a custom interface called PeriodicElement, an array named 

const ELEMENT_DATA: PeriodicElement[]
, and a component class.

I am struggling to figure out how to append new data to the ELEMENT_DATA array from within the class due to its placement outside of the class scope.

If anyone has experience with this issue and can offer assistance, I would greatly appreciate it!

angulartypescriptangular-material

Answer №1

After investigating the issue, I was able to successfully resolve it. You can view the solution by visiting https://stackblitz.com/edit/angular-fhngg8.

Here are the steps I took:

  1. Reorganized ELEMENT_DATA into a class
  2. Specified displayedColumns in the HTML
<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
  1. Added providers: [HttpClient] in the component
  2. Included 
    imports:[ BrowserModule, FormsModule, MatTableModule, BrowserAnimationsModule, HttpClientModule ]
    in the module
  3. In the response, there is no need for a foreach loop as the data is already an array. Instead, use 
    subscribe((response: any) => this.dataSource = response.data[0])

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