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並前往https://thinkster.io/tutorials/intro-to-reactive-forms-in-angular-make-forms-dynamic/demo-removing-items-from-a-formarray

Demo: Removing Items from a FormArray - Thinkster

We'll then use the FormArray method removeAt() , passing the index. removePhoneNumber(index: number): void { this.phoneNumbers.removeAt(index); }.

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