<input id="datePicker" type="date" />

美元(文档)。Ready (function() { var now = new Date(); var day = ("0" + now.getDate()).slice(-2); var月=(“0”+ (now.getMonth () + 1)) .slice (2); 今天var = now.getFullYear() +“-”+(月)+“-”+(一天); $ (' # datePicker ') .val(今天); })； < script src = " https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js " > < /脚本> <input id="datePicker" type="date" />

由于日期类型只接受“yyyy-MM-dd”格式，因此需要相应地格式化日期值。

这是它的解，

var d = new Date();
var month = d.getMonth();
var month_actual = month + 1;

if (month_actual < 10) {
  month_actual = "0"+month_actual; 
  }

var day_val = d.getDate();
if (day_val < 10) {
  day_val = "0"+day_val; 
  }

document.getElementById("datepicker_id").value = d.getFullYear()+"-"+ month_actual +"-"+day_val;

这依赖于PHP:

<input type="date" value="<?php echo date('Y-m-d'); ?>" />

一个简单的解决方案:

<input class="set-today" type="date">
<script type="text/javascript">
    window.onload= function() {
        document.querySelector('.set-today').value=(new Date()).toISOString().substr(0,10));
    }
</script>

HTML

<input type="date" id="theDate">

JQuery

$(document).ready(function() {
    var date = new Date();

    var day = date.getDate();
    var month = date.getMonth() + 1;
    var year = date.getFullYear();

    if (month < 10) month = "0" + month;
    if (day < 10) day = "0" + day;

    var today = year + "-" + month + "-" + day +"T00:00";       
    $("#theDate").attr("value", today);
});

demo

如果你不想使用jQuery，你可以这样做

JS

var date = new Date();

var day = date.getDate();
var month = date.getMonth() + 1;
var year = date.getFullYear();

if (month < 10) month = "0" + month;
if (day < 10) day = "0" + day;

var today = year + "-" + month + "-" + day;       
document.getElementById("theDate").value = today;

demo

TS

const date = new Date()
const year = date.getFullYear()

let month: number | string = date.getMonth() + 1
let day: number | string = date.getDate()

if (month < 10) month = '0' + month
if (day < 10) day = '0' + day

const today = `${year}-${month}-${day}`    
document.getElementById("theDate").value = today;

如果你需要填写输入日期时间，你可以使用这个:

<input type="datetime-local" name="datetime" 
       value="<?php echo date('Y-m-d').'T'.date('H:i'); ?>" />