JSFiddle - React, Tailwind, and code Playground

HTML

<form method="get" id="search" target="_blank">
  <select id="space">
    <option value='["https://google.com/search","q"]'>интернет</option>
    <option value='["https://www.youtube.com/results","search_query"]'>youtube</option>
  </select>
  <input type="text" id="text">
  <input type="submit" onClick="search_in();">
</form>

JavaScript

function search_in()
{
	var space = document.getElementById('space').value;
  
  space = JSON.parse(space);
  
  document.getElementById('search').action = space[0];
  document.getElementById('text').name = space[1];
}