How to get FormArray value in Angular 8?

To get the value of a FormArray in Angular 8, you need to access the controls property of the FormArray, which is an array of AbstractControl objects representing the form controls in the FormArray. You can then iterate over these controls to get their values.

Here is a step-by-step guide to getting the value of a FormArray in Angular 8:

1. Get a reference to the FormArray in your component:
“`typescript
formArray: FormArray;
“`

2. Initialize the FormArray in your component’s constructor or ngOnInit:
“`typescript
this.formArray = new FormArray([
new FormControl(‘value1’),
new FormControl(‘value2’),
]);
“`

3. To get the value of the FormArray, you can use the controls property and map over the controls to extract their values:
“`typescript
const formArrayValues = this.formArray.controls.map(control => control.value);
console.log(formArrayValues);
“`

By following these steps, you can easily get the value of a FormArray in Angular 8.

FAQs

1. How do I access a specific control value in a FormArray in Angular 8?

To access a specific control value in a FormArray, you can use the at() method of the FormArray to get a reference to the AbstractControl at a specific index and then access its value property.

2. Can I iterate over the controls of a FormArray in Angular 8?

Yes, you can iterate over the controls of a FormArray by using the forEach or map method on the controls property of the FormArray.

3. How can I get the length of a FormArray in Angular 8?

You can get the length of a FormArray in Angular 8 by accessing the length property of the controls array within the FormArray.

4. Is it possible to reset the values of a FormArray in Angular 8?

Yes, you can reset the values of a FormArray in Angular 8 by using the reset method on the FormArray, passing in the new values as arguments.

5. Can I add new controls to a FormArray in Angular 8?

Yes, you can add new controls to a FormArray in Angular 8 by using the push method on the FormArray, passing in a new AbstractControl object.

6. How do I remove a control from a FormArray in Angular 8?

To remove a control from a FormArray in Angular 8, you can use the removeAt method on the FormArray, passing in the index of the control you want to remove.

7. Can I update the value of a specific control in a FormArray in Angular 8?

Yes, you can update the value of a specific control in a FormArray in Angular 8 by accessing the control at a specific index using the at() method and then setting its value property to the new value.

8. How can I check if a FormArray is valid in Angular 8?

You can check if a FormArray is valid in Angular 8 by accessing the valid property of the FormArray, which will be true if all of the controls in the FormArray are valid.

9. How do I get the raw value of a FormArray in Angular 8?

To get the raw value of a FormArray in Angular 8, you can use the value property of the FormArray, which will return an array of the current values of all the controls in the FormArray.

10. Can I listen for value changes in a FormArray in Angular 8?

Yes, you can listen for value changes in a FormArray in Angular 8 by subscribing to the valueChanges observable of the FormArray, which emits an event every time the value of the FormArray changes.

11. How do I set the value of a FormArray in Angular 8?

To set the value of a FormArray in Angular 8, you can use the setValue or patchValue method on the FormArray, passing in the new values as arguments.

12. Is it possible to mark a FormArray as touched in Angular 8?

Yes, you can mark a FormArray as touched in Angular 8 by using the markAsTouched method on the FormArray, which will set the touched property to true for all controls in the FormArray.

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