如何在Chrome扩展程序中删除事件监听器 [英] How to remove event listener in Chrome extension
问题描述
我正在尝试在发出请求后删除由chrome.extension.onRequest.addListener
添加的onRequest
侦听器,如下所示:
I am trying to remove the onRequest
listener added by chrome.extension.onRequest.addListener
after a request is made, like this:
chrome.extension.onRequest.addListener(
function(request){
chrome.extension.onRequest.removeListener();
other_function(request);
}
);
问题是我不知道这是否可行.我尝试了chrome.extension.onRequest.hasListener
,它似乎没有给出正确的答案,所以我想知道是否还有其他方法可以删除onRequest
侦听器或检查该侦听器是否存在.
The problem is that I don't know if this works or not. I tried chrome.extension.onRequest.hasListener
, which seems not to give the right answer, so I am wondering if there are some other ways to remove the onRequest
listener or check if the listener exists or not.
谢谢!
推荐答案
removeListener
接受一个参数.您需要命名侦听器函数,然后按名称将其删除:
removeListener
takes an argument. You need to name the listener function and then remove it by name:
function doStuff(request){
chrome.extension.onRequest.removeListener(doStuff);
other_function(request);
}
chrome.extension.onRequest.addListener(doStuff);
或更简洁地说:
chrome.extension.onRequest.addListener(
function doStuff(request){
chrome.extension.onRequest.removeListener(doStuff);
other_function(request);
}
);
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