javascript - 网站加载后如何触发按键组合？

Question

我有一个输入字段，我想做的是一旦网站加载它会触发点击输入然后向下箭头最后输入我尝试了下面的代码但我无法实现它我是刚开始使用按键，

HTML:

<input type="text" name="location" class="location" id="destination-autocomplete" placeholder="Enter a location" autocomplete="off">

JS

$('#destination-autocomplete').trigger(jQuery.Event('keypress', { keycode: 13 }));
$('#destination-autocomplete').trigger(jQuery.Event('keypress', { keycode: 40 }));
$('#destination-autocomplete').trigger(jQuery.Event('keypress', { keycode: 13 }));

Answer 1

将其包装在准备好的文档中

$( document ).ready(function() {
    $('#destination-autocomplete').trigger(jQuery.Event('keypress', { keycode: 13 }));
$('#destination-autocomplete').trigger(jQuery.Event('keypress', { keycode: 40 }));
$('#destination-autocomplete').trigger(jQuery.Event('keypress', { keycode: 13 }));
});