问题描述
对于我的Chrome扩展程序，我想在browserAction弹出窗口关闭时执行一个操作.我了解发生这种情况时不会触发任何内置事件.我发现了此建议以后台脚本打开连接，然后使用该连接的port.onDisconnect事件来检测到弹出窗口正在关闭.
For my chrome extension, I want to perform an action when the browserAction popup window closes. I understand that there no built-in events are triggered when this happens. I found this suggestion to open a connection with the background script, and then use the connection's port.onDisconnect event to detect that the popup window is closing.
但是，当弹出窗口关闭时，我在开发人员控制台中看到了后台脚本的以下错误:
However, when the popup window closes, I see the following error in the Developer Console for the background script:
(BLESSED_EXTENSION context for glkehflnlfekdijfhacccflbffbjhgbd) extensions::messaging:102: Uncaught TypeError: Cannot read property 'destroy_' of undefined{TypeError: Cannot read property 'destroy_' of undefined
at PortImpl.destroy_ (extensions::messaging:102:37)
at dispatchOnDisconnect (extensions::messaging:322:29)}
我使用的脚本在下面详细说明.
The scripts that I use are detailed below.
你能看到我要去哪里了吗?
Can you see where I am going wrong?
manifest.json
manifest.json
{ "manifest_version": 2
, "name": "Detect when popup closes"
, "version": "0.1"
, "browser_action": {
"default_icon": "popup.png"
, "default_popup": "popup.html"
}
, "background": {
"scripts": [
"background.js"
]
}
}
popup.html
popup.html
<!DOCTYPE html>
<body>
<h1>Test</h1>
<script src="popup.js"></script>
</body>
</html>
popup.js
var port = chrome.runtime.connect()
background.js
background.js
chrome.runtime.onConnect.addListener(function (externalPort) {
externalPort.onDisconnect = function () {
try {
var ignoreError = chrome.runtime.lastError
} catch (error) {
console.log("onDisconnect")
}
}
)
推荐答案
onDisconnect不是可分配的属性.
该对象提供addListener方法来注册回调:
onDisconnect is not an assignable property.
It's an object that provides addListener method to register a callback:
externalPort.onDisconnect.addListener(function() {
var ignoreError = chrome.runtime.lastError;
console.log("onDisconnect");
});
这篇关于Chrome扩展程序:检测弹出窗口何时关闭的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！