Is it better to use the addEventListener method in these scenarios?
<input id="input" type="file" onchange="fun()>
or
document.getElementById("input").addEventListener("change", function() {
fun();
});
What are the advantages of using one over the other?
Ensuring the onchange attribute is not dependent on a globally scoped function is crucial in larger applications where naming conflicts may occur. To avoid this issue, it's recommended to encapsulate the event listener within a closure when working on components that are used multiple times on a page:
By wrapping the addEventListener method inside an Immediately Invoked Function Expression (IIFE), like below, you can keep the function isolated and prevent any potential clashes with other functions:
(function(){
function fun(){
// Other components can now also have their own `fun` function without any confusion.
// The scope of `fun` is limited to the IIFE, ensuring no global conflicts.
}
document.getElementById("input").addEventListener("change", function() {
fun();
});
})();
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