Why Angular ReactiveForms FormArray throws error "TypeError: Cannot read property 'updateOn' of null"

Question

Hello All I have a Formarray which which has set of Roles. During Edit it dynamically removes & adds roles in that form array till here all works fine, but when i submit the form it thorws error & the page gets refresh.

Error : TypeError: Cannot read property 'updateOn' of null

Also I am attaching the screen shot below

Sandeep Patel · Accepted Answer · 2020-01-13 15:13:32Z

10

it is worked for Me

Make sure you have put <button type="button" ></button> instead of <input type="submit" />

<button [ngClass]="(this.editMemberForm.invalid?'a1':'')" type="button" class="btn btn-success" (click)="saveData()">Save</button>

answered Jan 13, 2020 at 15:13

Sandeep Patel

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Salad.Guyo · Accepted Answer · 2021-10-30 13:38:01Z

0

Have a close look at what you're doing on your formGroup

For me doing some formGroup.removeControl("somefield");

raised the same error.

answered Oct 30, 2021 at 13:38

Salad.Guyo

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Why Angular ReactiveForms FormArray throws error "TypeError: Cannot read property 'updateOn' of null"

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Have a close look at what you're doing on your formGroup

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Have a close look at what you're doing on your formGroup

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