页面加载时触发选项卡按下键事件

问题描述：

我有一个请求，应该在页面加载时触发Tab键按下键盘事件.我尝试了以下示例，但它不起作用.

I have a request where on page load I should trigger the tab press keyboard event. I tried below example but it does not work.

我的要求是在页面加载时将重点放在父html页面中的元素上，但是我无权访问此父页面的源代码.我的html页面是作为框架的父项的一部分.因此，在加载页面(父级已加载)时，我想触发Tab键按下事件以将焦点设置在父级元素上.

My requirement is to set focus on a element in parent html page on page load, but I do not have access to the source code of this parent page. My html page is part of the parent as a frame. So on load of my page (parent is already loaded) I want to trigger the tab press key event to set the focus on the element from parent.

注意:此元素是父页面中的第一个元素，因此，在第一个选项卡上，焦点转移到了此元素.我无法编辑父页面

Note : This element is the first element in the parent page and hence on first tab the focus shifts to this. I cannot edit the parent page

<!DOCTYPE html>
<html>
   <head>
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
      <script>
         $(document).ready(function(){
         	$("#input1").focus();
             var press = jQuery.Event("keypress");
             press.which = 9;
             $("#input1").trigger(press);
         });
         
         
      </script>
   </head>
   <body>
      <input type="text" name="myInput1" id="input1" />
      <input type="text" name="myInput2" id="input2" />
      <input type="text" name="myInput3" id="input3" />
   </body>
</html>

答

此$("1")无效.您必须按类$(".1")或ID $("#1")来获取元素.您的情况是$("#1").

This $("1") won't work. You have to grab the element by class $(".1") or id $("#1"). In your case it would be $("#1").

页面加载时触发选项卡按下键事件

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