[Vuejs]-Simulate keyboard event not working on textarea in Vuejs

Just change

<textarea
   id="terminal"
   autocorrect="off"
   spellcheck="false"
   @click.prevent
   @keydown.prevent="handleKey"
></textarea>

To the following. so you dont block the input or you will have to handle it manualy

<textarea
   id="terminal"
   autocorrect="off"
   spellcheck="false"
   @click.prevent
   @keydown="handleKey"
></textarea>

And in the event handler prevent it (stop the propagation) by call. In this case

handleKey(event) {
...
event.stopPropagation()
}