以角度2反应形式动态删除表单控件

Question

Try to remove a control that I add to a form

I have tried this.*FormArray*.splice but it doesn't compile. Saying that FormArray has no method splice . Then I tried removeAt() but then when I run the code the error says, removeAt is not a method . One compile time fails, the next runtime fails.

I want to remove a control from an array of controls.

Answer 1

removeAt() is a method on the FormArray namespace, but not a ES5-7 method.

(<FormArray>items).removeAt(idx) forced the array to become a Typescript FormArray object which opened up the methods.