I recently started working on a form using StackBlitz, but I've hit a roadblock and need some guidance on how to proceed.
My goal is to achieve a similar effect like the one shown in this gif: https://i.stack.imgur.com/76nsY.gif and I'd like to implement it following the approach used in this code snippet: Github - RESTer
I attempted to use the (change) method, but it only triggers after pressing Enter, which doesn't meet my requirements.
To manage the input event on the final line, you can do the following:
<div *ngFor="let header of headers; let i = index; let isLast = last" fxLayout="row" fxLayoutGap="25px">
<mat-form-field fxFlex="25">
<input matInput placeholder="Name" type="text" name="name-{{i}}" value="{{header.name}}"
(input)="handleInput(isLast)">
</mat-form-field>
<mat-form-field fxFlex>
<input matInput placeholder="Value" type="text" name="value-{{i}}" value="{{header.value}}">
</mat-form-field>
...
</div>
utilize the handleInput function, which inserts a new entry upon the first modification of the input content:
export class DynamicformComponent implements OnInit {
public headers: any[] = [];
ngOnInit() {
this.headers = [
{ name: 'Accept-Encoding', value: 'gzip' },
{ name: 'Accept-Charset', value: 'utf-8' },
{ name: 'User-Agent', value: '' },
{ name: 'Accept', value: 'text/plain' },
{ name: 'Cookie', value: '' },
{ name: '', value: '' }
];
}
handleInput(isLast: boolean) {
if (isLast) {
this.headers.push({ name: '', value: '' });
}
}
eraseInput(index) {
this.headers.splice(index, 1)
}
}
View the demonstration on this stackblitz.
If you are working with reactive forms, consider utilizing formArray. Check out this resource for more information on using dynamic controls with form arrays: https://angular.io/guide/reactive-forms#dynamic-controls-using-form-arrays
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