javascript - 有一个选择表单字段获取今天是星期几

Question

我有一个表单，您可以在其中选择一周中的某一天来搜索相应的数据。我希望有某种方法可以在加载表单时预先选择一周中的今天。任何指导将不胜感激，我认为这将是 javascript，我对此知之甚少。乔

<select name="tax_days" id="days-tax" class="gmw-dropdown-days gmw-dropdown-taxonomy">
	<option value="0"> – All – </option>
	<option class="level-0" value="15">Monday</option>
	<option class="level-0" value="29">Tuesday</option>
	<option class="level-0" value="5">Wednesday</option>
	<option class="level-0" value="43">Thursday</option>
	<option class="level-0" value="54">Friday</option>
	<option class="level-0" value="57">Saturday</option>
	<option class="level-0" value="65">Sunday</option>
</select>

Answer 1

window.onload = function() {
    var currentDay = new Date().getDay();
    if (currentDay == 0) {
      // Sunday is at the end of the select
      currentDay = 7;
    }
    document.getElementById("days-tax").selectedIndex = currentDay;
};

<select name="tax_days" id="days-tax" class="gmw-dropdown-days gmw-dropdown-taxonomy">
  <option value="0">– All –</option>
  <option class="level-0" value="15">Monday</option>
  <option class="level-0" value="29">Tuesday</option>
  <option class="level-0" value="5">Wednesday</option>
  <option class="level-0" value="43">Thursday</option>
  <option class="level-0" value="54">Friday</option>
  <option class="level-0" value="57">Saturday</option>
  <option class="level-0" value="65">Sunday</option>
</select>