Last updated: Mar 4, 2024
Reading time·3 min
There are multiple reasons the removeEventListener
method might not work:
addEventListener
and
removeEventListener
methods.bind
method which returns a new function when calling
removeEventListener
.removeEventListener
on a different DOM element than the
addEventListener
method.capture
flag.Here is the most common cause of the issue - passing 2 different functions to the addEventListener() and removeEventListener() methods.
const btn = document.getElementById('btn'); btn.addEventListener('click', function logger() { console.log('Button clicked'); }); // ⛔️ Doesn't work - we define another function btn.removeEventListener('click', function logger() { console.log('Button clicked'); });
The function we passed to the 2 methods looks identical, however, these are two different functions with completely different references, stored in different locations in memory.
To the JavaScript engine, these 2 functions are not related in any way.
Instead, you should define the function and pass the same reference to the
addEventListener
and removeEventListener
methods.
const btn = document.getElementById('btn'); function logger() { console.log('Button clicked'); } btn.addEventListener('click', logger); // ✅ Works btn.removeEventListener('click', logger);
We passed the same reference to both methods, so the removeEventListener
method works as expected.
Another common cause of the removeEventListener
method not working is using
the bind
method which returns a new function.
const btn = document.getElementById('btn'); function logger() { console.log('Button clicked'); } btn.addEventListener('click', logger); // ⛔️ Doesn't work - bind returns a new function btn.removeEventListener('click', logger.bind(null));
The
bind()
method returns a copy of the given function with the provided this
value and
initial arguments.
To avoid this issue, assign the return value of calling the bind()
method to a
variable and pass it to both the addEventListener
and removeEventListener
methods.
const btn = document.getElementById('btn'); function logger() { console.log('Button clicked'); } const boundLogger = logger.bind(null); btn.addEventListener('click', boundLogger); // ✅ Works btn.removeEventListener('click', boundLogger);
removeEventListener
on another DOM elementAnother common cause of the removeEventListener
method not working is calling
the method on another DOM element.
const btn = document.getElementById('btn'); function logger() { console.log('Button clicked'); } btn.addEventListener('click', logger); // 👇️ Different DOM element const blueBtn = document.getElementById('blue-btn'); // ⛔️ Doesn't work called on different DOM element blueBtn.removeEventListener('click', logger);
To solve the issue, make sure to call the removeEventListener
method on the
same element you called the addEventListener
method on.
addEventListener
method twiceLastly, you might also get this behavior if you call the addEventListener
method twice - once without capture and once with capture.
const btn = document.getElementById('btn'); function logger() { console.log('Button clicked'); } btn.addEventListener('click', logger, true); btn.addEventListener('click', logger, false); // ⛔️ Doesn't work registered with and without capture btn.removeEventListener('click', logger);
You have to remove each event listener separately to resolve the issue.
const btn = document.getElementById('btn'); function logger() { console.log('Button clicked'); } btn.addEventListener('click', logger, true); btn.addEventListener('click', logger, false); // ✅ Works btn.removeEventListener('click', logger, true); btn.removeEventListener('click', logger, false);
We had to call the removeEventListener
method twice to remove both events -
the one that had the capture flag set and the one that didn't.
To resolve the removeEventListener
not working issue, make sure to pass the
same function to the addEventListener
and removeEventListener
methods.
Passing a function that has a different reference will not remove the listener.
You can learn more about the related topics by checking out the following tutorials: