In flutter, you can achieve this by adding autofocus: true to your TextField.
color: rgb(212, 212, 212); background-color: rgb(30, 30, 30); font-family: Consolas, "Courier New", monospace; font-size: 14px; line-height: 19px; white-space: pre-wrap;](color: #4ec9b0;](TextField( autofocus: color: #569cd6;](true,)
Hope this is helpful to you.
Thanks.