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How to check whether dynamically attached event listener exists or not?

Here is my problem: is it possible somehow to check for existence of dynamically attached event listener? Or how can I check the status of the "onclick" (?) property in DOM? I have searched internet just like Stack Overflow for a solution, but no luck. Here is my html: ...
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What guidelines for HTML email design are there? [closed]

What guidelines can you give for rich HTML formatting in emails while maintaining good visual stability across many clients and web based email interfaces? ...
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Why must wait() always be in synchronized block

We all know that in order to invoke Object.wait() , this call must be placed in synchronized block, otherwise an IllegalMonitorStateException is thrown. But what's the reason for making this restriction? I know that wait() releases the monitor, but why do we need to explicitly acquire the mon...
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How to check if a path is absolute path or relative path in cross platform way with Python?

UNIX absolute path starts with '/', whereas Windows starts with alphabet 'C:' or '\'. Does python has a standard function to check if a path is absolute or relative? ...
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Convert date to another timezone in JavaScript

I am looking for a function to convert date in one timezone to another. 24 Answers 24...
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Fixed point vs Floating point number

I just can't understand fixed point and floating point numbers due to hard to read definitions about them all over Google. But none that I have read provide a simple enough explanation of what they really are. Can I get a plain definition with example? ...
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Clone private git repo with dockerfile

I have copied this code from what seems to be various working dockerfiles around, here is mine: 7 Answers ...
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How to make Google Chrome JavaScript console persistent?

Since I'm building a dynamic site, I need to track the changes between pages, ie. Ajax calls, POST, GET stuff and similar stuff. ...
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Adding and removing style attribute from div with jquery

I've inherited a project I'm working on and I'm updating some jquery animations (very little practice with jquery). 7 Answe...
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New Array from Index Range Swift

How can I do something like this? Take the first n elements from an array: 5 Answers 5...