You donвЂ™t need to import nothing to do thisOnclick is an inline event. How to remove a JS Event ListenerButtonEl.removeEventListener('click', () => alert('Hi user!')) Just like that! You must use removeEventListener to clean up.So far, from the look of using inline onClick and plain JS event listener, I think IвЂ™d rather go with onClick.But there are pros to using addEventListener: You should always remove an event listener when youвЂ™re done using it. What type of event youвЂ™re looking for, and the function to trigger after the event has happened.You can look for all the event references here.But like any good samaritan, you must clean up after yourself. LetвЂ™s do a code breakdown.First I create a variable named buttonEl, and itвЂ™s value is an the button node element.Then IвЂ™m adding an event listener by using, buttonEl.addEventListener().The addEventListener function requires 2 arguments. How to add a JS Event ListenerConst buttonEl = document.getElementById('greetBttn') ButtonEl.addEventListener('click', () => alert('Hi user!')) Okay, this isnвЂ™t too bad.

For the sake of simplicity, IвЂ™m going to use inline styling as well.BoxShadow: '0 2px 5px 0 rgba(0,0,0,0.25)'Const isClosest = e.target.closest(``) If (this.state. When to use addEventListenerThere are a few a use cases where you need to implement your own event listener.This is usually because of a specific UI behavior that you or the designers want to achieve.An example is, when you have a modal popup, and you want to make it disappear when you click anywhere else but the dialog itself.HereвЂ™s the code answer. Double win for us! Which to pick 99% of the time?Just use React onClick Synthetic Event. Does React remove event listener?LetвЂ™s take a look at plain JS event listener in a React component.addEventListener('click', this.handleClick).removeEventListener('click', this.handleClick)Since IвЂ™ve added my own custom event listener, I have to clean it up myself.But if we do it the React way, they handle that for us!And itвЂ™s less code. Quick overview of what is Synthetic EventsSynthetic Events is a React instance that all regular events go through in React.React has created this to keep consistency for all browsers, and to increase performance since SyntheticEvent is pooled.

Add Event Listener Javascript