Unable to pre-select the radio button in the form by default

@marytee123 wrote:

Ionic 4:

I have the the following form with radio buttons:

One

    <ion-item>
      <ion-label>{{value1}}</ion-label>
      <ion-radio slot="start" value={{value1}} checked></ion-radio>
    </ion-item>

{{value2}}

 </ion-radio-group>
</ion-list>

I tried [checked] = “true”, [checked]=‘true,’ nothing works. How can I pre-select a radio button by default?

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