My goal is to create a DropdownBox that will automatically fill input fields based on the selected value. For example, selecting "Arnold" from the dropdown will populate another textbox with "Laptop". How can I accomplish this?
{ name:'Arnold', item:'Laptop' }
The dropdown includes the option for Name, but once "Arnold" is selected, the corresponding input field is populated with "Laptop". Here is the code I have so far: https://stackblitz.com/edit/mat-dialog-example-qzg1ea
Aside from the mentioned issue, there is another point to consider.
You are very close to finding the solution.
<mat-select
(selectionChange)="selectedType($event)"
formControlName="name"
style="width:200px"
>
<mat-option *ngFor="let item of items" [value]="item.name">
{{ item.name }}
</mat-option>
</mat-select>
In order for the selectionChange event to be triggered when a dropdown option is selected/changed.
selectionChange: EventEmitter<C>
This event will be emitted once the user changes the selected value.
Within the selectedType method, locate the selected item in the items array. If the item is located, use .patchValue() to update the value of the item control.
items = ELEMENT_DATA;
selectedType(trigger: MatSelectChange) {
...
const selectedItem = this.item.find((x) => x.name == trigger.value);
if (selectedItem) this.fg.controls.item.patchValue(selectedItem.item);
}
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