javascript - GM_registerMenuCommand()的 `accessKey`参数是什么，如何使用？

Question

我在看 GM_registerMenuCommand Tampermonkey 中的函数，我注意到第三个参数称为 accessKey 并认为它是传递一个热键来触发这个命令。

传递的参数的格式是什么，我假设这是它的作用是不是错了？

我在任何地方都找不到有关该参数的文档。 这里有人用过吗？

Answer 1

syntax for that function is :

GM_registerMenuCommand (menuName, callbackFunction, accessKey)

• 其中 accessKey(如果提供)必须是作为 menuName 传入的字符串的单个字母。
  它是用于facilitate Good UI by adding keyboard-only support 的菜单“访问键” .

来自 Menu Design Guidelines ^(8号):

Dropdowns (both menus and boxes) should support not only mouse input, but keys as well. In dropdown menus, access keys should enable users to quickly select a visible option without using the mouse. In a dropdown box, users should be able to type a letter and quickly navigate to options starting with that letter.

^{(已添加重点。)}

重要提示:Access keys are different from, and in addition to, any command shortcuts ("hotkeys") .

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这是一个示例 Tampermonkey 工作脚本，说明了用法:

// ==UserScript==
// @name     _GM_registerMenuCommand demo
// @match    https://stackoverflow.com/questions/56024629/*
// @match    *://YOUR_SERVER.COM/YOUR_PATH/*
// @grant    GM_registerMenuCommand
// ==/UserScript==

/*-- GM_registerMenuCommand (menuName, callbackFunction, accessKey)
*/
GM_registerMenuCommand ("Say Hello", helloFunc, "H");

function helloFunc () {
    console.log ("Say hello to my little script.");
}

如果你通过 Tampermonkey 安装并运行它，你会看到(点击查看大图):

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注意事项:

1. Violentmonkey ignores the accessKey parameter, for now.
2. Greasemonkey 4+ has borked this feature . Per usual .
3. 您可以set a keyboard command to activate the Tampermonkey icon/menu in Chrome .
4. 目前在 Firefox 中似乎无法激活键盘图标，但 a workaround is scheduled for Firefox version 67 .