javascript 从内容脚本向后台脚本发送消息会破坏 chrome 扩展
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Sending message from content script to background script breaks chrome extension
提问by user1573618
I am trying to send a message from a content script to the background script in a chrome extension that triggers a rich notification to open. I can already achieve this but it breaks the rest of my extension.
我正在尝试将消息从内容脚本发送到 chrome 扩展程序中的后台脚本，以触发丰富的通知打开。我已经可以做到这一点，但它打破了我的扩展的其余部分。
In my content script I have a call to chrome.extension.sendMessage inside of which I load my extension code. This was all working fine until I added my notification code, I decided to use chrome Rich Notifications API as I would like to have buttons in my notification eventually, and I am led to believe that only the background script can open the rich notification, hence the need for messages. If I comment out the chrome.runtime.OnMessage.addListener function in background.js my extension logic loads properly again, so something about that call is conflicting with the chrome.extension.sendMessage function in inject.js.
在我的内容脚本中，我调用了 chrome.extension.sendMessage，我在其中加载了扩展代码。这一切正常，直到我添加了我的通知代码，我决定使用 chrome Rich Notifications API，因为我最终希望在我的通知中有按钮，并且我相信只有后台脚本才能打开丰富的通知，因此消息的需要。如果我在 background.js 中注释掉 chrome.runtime.OnMessage.addListener 函数，我的扩展逻辑会再次正确加载，因此该调用与inject.js 中的 chrome.extension.sendMessage 函数发生冲突。
Can anyone explain why this happens and how to fix it?
谁能解释为什么会发生这种情况以及如何解决？
A simplified version of my code is as follows:
我的代码的简化版本如下：
manifest.json
清单文件.json
{
"name": "Test",
"version": "0.0.1",
"manifest_version": 2,
"description": "Test
"permissions": [
"notifications"
],
"background": {
"persistent": false,
"scripts": ["background.js"]
},
"content_scripts": [
{
"matches": [
"mywebsite/*"
],
"js": [
"inject.js",
]
}
],
"web_accessible_resources": [
"notificationIcon.png"
]
}
background.js
背景.js
chrome.runtime.onMessage.addListener(function(request, sender) {
if (request.type == "notification")
chrome.notifications.create('notification', request.options, function() { });
});
inject.js
注入.js
chrome.extension.sendMessage({}, function(response) {
//code to initialize my extension
});
//code to send message to open notification. This will eventually move into my extension logic
chrome.runtime.sendMessage({type: "notification", options: {
type: "basic",
iconUrl: chrome.extension.getURL("icon128.png"),
title: "Test",
message: "Test"
}});
采纳答案by user1573618
The problem was caused because my listener in background.js was not returning a response. So the function response of my chrome.extension.sendMessage was never being executed.
问题是因为我在 background.js 中的监听器没有返回响应。所以我的 chrome.extension.sendMessage 的函数响应从未被执行。
I changed my background.js to be:
我将我的 background.js 更改为：
chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
if (request.type == "worktimer-notification")
chrome.notifications.create('worktimer-notification', request.options, function() { });
sendResponse();
});
