jquery - 获取下拉列表中的当前日期

Question

所以我有 HTML 下拉列表

<select name="Todays_Day">
    <option value="" selected></option>
    <option value="Monday">Monday</option>
    <option value="Tuesday">Tuesday</option>
    <option value="Wednesday">Wednesday</option>
    <option value="Thursday">Thursday</option>
    <option value="Friday">Friday</option>
    <option value="Saturday">Saturday</option>
    <option value="Sunday">Sunday</option>
</select>

JQuery 有没有办法选择今天？例如，今天是 6/12/2014，因此它会自动选择星期四。

Answer 1

您可以创建一个包含星期几的数组，然后使用 getDay (根据本地时间返回指定日期的星期几 (0-6)。)从 Date 对象获取当前日期。然后你可以使用它传递给jquery val方法:

var d =["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"][(new Date()).getDay()]
$("select").val(d);

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select name="Todays_Day">
    <option value="Monday">Monday</option>
    <option value="Tuesday">Tuesday</option>
    <option value="Wednesday">Wednesday</option>
    <option value="Thursday">Thursday</option>
    <option value="Friday">Friday</option>
    <option value="Saturday">Saturday</option>
    <option value="Sunday">Sunday</option>
</select>