Angular dynamic table using ngFor - html

Question

I would like to know if it is possible to create a dynamic HTML table from JSON data. The amount of columns and headers should change according to the keys in the JSON. For example this JSON should create this table:
{
color: "green", code: "#JSH810"
}
,
{
color: "red", code: "#HF59LD"
}
...
And this JSON should create this table:
{
id: "1", type: "bus", make: "VW", color: "white"
}
,
{
id: "2", type: "taxi", make: "BMW", color: "blue"
}
...
This has to be 100% dynamic though, because I want to display hundreds of different JSON objects, so nothing should be hard coded in the HTML page.

Answer 1

If you want to get the key of your object as the head of your table, you should create a custom pipe.
import { PipeTransform, Pipe } from '#angular/core';
#Pipe({name: 'keys'})
export class KeysPipe implements PipeTransform {
transform(value, args:string[]) : any {
let keys = [];
for (let key in value) {
keys.push(key);
}
return keys;
}
}
Update: Or simply return keys using Object.keys().
(demo)
#Pipe({name: 'keys'})
export class KeysPipe implements PipeTransform {
transform(value, args:string[]) : any {
return Object.keys(value);
}
}
Now into your html template:
<table>
<thead>
<tr>
<th *ngFor="let head of items[0] | keys">{{head}}</th>
</tr>
</thead>
<tbody>
<tr *ngFor="let item of items">
<td *ngFor="let list of item | keys">{{item[list]}}</td>
</tr>
</tbody>
</table>
Update: Here is the demo.

Answer 2

This can help:
export class AppComponent {
//Array of any value
jsonData:any = [
{id: "1", type: "bus", make: "VW", color: "white"},
{id: "2", type: "taxi", make: "BMW", color: "blue"}
];
_object = Object;
}
<div>
<table border="1">
<thead>
<tr>
<th *ngFor="let header of _object.keys(jsonData[0]); let i = index">{{header}}</th>
</tr>
</thead>
<tbody>
<tr *ngFor="let row of jsonData; let i = index">
<th *ngFor="let objKey of _object.keys(row); let j = index">{{ row[objKey] }} </th>
</tr>
</tbody>
</table>
</div>