javascript 通过javascript触发向上或向下箭头键事件
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Trigger an UP or DOWN ARROW key event through javascript
提问by Rishab Gupta
There is some event listener in Thunderbird which resolves the emails address from my LDAP server when i press the UP or DOWN ARROW key. so i want to trigger that the same event through Javascript without having to physically press the up or down arrow key. How can i do this?
当我按向上或向下箭头键时，Thunderbird 中有一些事件侦听器可以解析来自我的 LDAP 服务器的电子邮件地址。所以我想通过 Javascript 触发相同的事件，而不必物理按下向上或向下箭头键。我怎样才能做到这一点？
采纳答案by a_pradhan
I believe this is what you want (using JQuery)
我相信这就是你想要的（使用 JQuery）
var e = jQuery.Event("keyup");
// e.which is used to set the keycode
e.which = 38; // it is up
e.which = 40; // it is down
$("id_to_element").trigger(e);
If JQuery is not allowed to use, pure javascript solution is more verbose. See this answer
如果不允许使用 JQuery，纯 javascript 解决方案更加冗长。看到这个答案
Note: There maybe a bug in Chrome which will hamper this. I would recommend JQuery for less headache.
注意：Chrome 中可能有一个错误会阻碍这一点。我会推荐 JQuery 来减少头痛。
