upload component triggers document dialog twice times when using enter key

[d2833599931]

I use tab key to focus on the upload component, and would like to open document dialog one time only by enter key, but

what beyond my expectation is that the dialog was opened again when I select cancel button.

[d2833599931]

the problem was solved: I had add (keypress)="$event.preventDefault()" on button label.
<nz-upload [nzHeaders]="{ authorization: 'authorization-text' }" (nzChange)="handleChange($event)"> <button nz-button (keypress)="$event.preventDefault()"> <i nz-icon nzType="upload"></i> Click to Upload </button> </nz-upload>