页面刷新后选项选择器的值更改

Question

我有一个下拉菜单，当用户从下拉菜单中选择一个选项时，该下拉菜单会将值附加到URL。但是，刷新页面后，将选择default / 1st选项。

<select id="ThemeSelect" onchange="saveTheme(this.value);">
  <option value="en">English</option>
  <option value="fr">French</option>
  <option value="ru">Russian</option>
</select>

document.addEventListener('mousedown', userInteractionEvent, {
  once: true
});
document.addEventListener('mousemove', userInteractionEvent, {
  once: true
});
document.addEventListener('touchstart', userInteractionEvent, {
  once: true
});
document.addEventListener('scroll', userInteractionEvent, {
  once: true
});
document.addEventListener('keydown', userInteractionEvent, {
  once: true
});