How to pass parameters to a function being passed as an argument of addEventListener or being assigned to an event handler?

问题

What is the correct and professional way to add parameters to a function being passed to addEventListener() or or being directly assigned to an event handlers as in el.onclick = doSomething(param);

回答1:

You can use an anonymous function when you need to pass parameters to another, like this:

el.addEventListener("click", function() { doSomething(param); }, false); 

Whereas if it didn't need parameters, it would just be:

el.addEventListener("click", doSomething, false); 

来源：https://stackoverflow.com/questions/4305196/how-to-pass-parameters-to-a-function-being-passed-as-an-argument-of-addeventlist