Chrome扩展程序上下文菜单未显示

问题描述

我试图将一个上下文菜单项添加到一个Chrome应用程序中，它根本没有显示出来。我读过的所有内容似乎都表明我在这里做的是正确的事情，但显然我没有。

background.js：

  var clickHandler = function（e）{
 console.log（'testing testing'）; 
} 
 chrome.contextMenus.create（{
title：Click Me，
contexts：[page，selection，image， link]，
onclick：clickHandler 
}）; 
  

manifest.json：

  {
update_url：https://clients2.google.com/service/update2/crx，
name：Test，
 description：Test，
manifest_version：2，
version：3.2.3，
kiosk_enabled：true，
图标： {
128：icon_128.png，
16：icon_16.png
}，
app：{
background ：{
scripts：[background.js]，
persistent：false 
} 
}，
permissions：[
http：// * /，https：// * /，webview，storage，power，alwaysOnTopWindows，idle，contextMenus
] 
} 
  

没有记录错误或类似的东西。该项目根本不显示。我错过了什么？

解决方案

您错过了在 contextMenu 文档中：

注册监听器确实有（persistent）：false


Chrome会卸载该页面，并且对 clickHandler 的引用可以走开。相反，事件页面机制确保如果您使用 addListener 注册了一个事件，页面将被重新加载， addListener



所以：



  var clickHandler = function（e）{
 console.log（'testing testing'）; 
 
 
 chrome.contextMenus.create（{
title：Click Me，
contexts：[page，selection， image，link] 
}）; 
 
 //必须在事件页面加载时同步调用，
 //例如在顶层代码中
 chrome.contextMenus.onClicked.addListener（clickHandler）; 
  




I'm trying to add a context menu item to a chrome app and it's not showing up at all. Everything I've read seems to indicate that I'm doing the right thing here, but evidently I'm not.

background.js:

var clickHandler = function(e) {
  console.log('testing testing');
}
chrome.contextMenus.create({
  "title": "Click Me",
  "contexts": ["page", "selection", "image", "link"],
  "onclick" : clickHandler
});

manifest.json:

{
    "update_url": "https://clients2.google.com/service/update2/crx",
    "name": "Test",
    "description": "Test",
    "manifest_version": 2,
    "version": "3.2.3",
    "kiosk_enabled": true,
    "icons": {
        "128": "icon_128.png",
        "16": "icon_16.png"
    },
    "app": {
        "background": {
            "scripts": [ "background.js" ],
            "persistent": false
        }
    },
    "permissions": [
        "http://*/", "https://*/", "webview", "storage", "power", "alwaysOnTopWindows", "idle", "contextMenus"
    ]
}

There are no errors being logged or anything like that. The item simply does not show up. What am I missing here?

解决方案

You missed a small note in the contextMenu documentation:

You do have an Event page ("persistent": false), so it applies to you.

Chrome unloads the page, and the reference to clickHandler can get lost. On the contrary, Event page mechanism ensures that if you registered an event with addListener the page will be loaded again, addListener applied again and then your listener executed.

So:

var clickHandler = function(e) {
  console.log('testing testing');
}

chrome.contextMenus.create({
  "title": "Click Me",
  "contexts": ["page", "selection", "image", "link"]
});

// Must be synchronously called on event page load,
//   for instance in the top level code
chrome.contextMenus.onClicked.addListener(clickHandler);

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