JSFiddle - React, Tailwind, and code Playground

HTML

<select id="aaa">
    <option>我要被觸發啦</option>
    <option>我要被觸發啦</option>
</select>

<input type="button" id="btn" value="按這個可以觸發select的選取事件嗎">

JavaScript

$('#btn').click(function(){
    $('#aaa').trigger('focus').trigger("click");
});