HTMLInputElement: name 属性

<p>
  <label for="planet">Which planet were you born on?</label>
  <input id="planet" type="text" name="origin" />
</p>

const inputElement = document.querySelector("#planet");
console.log(`Element's name: ${inputElement.name}`); // "Element's name: origin"
inputElement.name = "planet"; // updates the element's name