Input border cutout for label cross section

I would like to put inputs label on border cross section and would like to hide borders under label like this

I did this by simply making label background white but it obviously doesn’t work if I place it inside grey div any other solution for this?

Also I’m using quasar inputs so I’m limited to css only solutions

>Solution :

Use fieldset

textarea {
  width: 100%;
  border: none;
}

<form>
  <fieldset>
    <legend>Your heading</legend>
    <textarea></textarea>
  </fieldset>
</form>