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How to Simplify Event Listener Assignment for Multiple Elements?

Mary-Kate Olsen
Mary-Kate OlsenOriginal
2024-10-30 17:43:31656browse

How to Simplify Event Listener Assignment for Multiple Elements?

Simplifying Event Listener Assignment for Multiple Elements

You may encounter a situation where you need to add event listeners to multiple elements. While it's possible to assign listeners individually as shown:

element1.addEventListener("input", function() {
  // This function does stuff
});

or by chaining conditional statements:

element1 && element2.addEventListener("input", function() {
  // This function does stuff
});

these methods can become tedious when dealing with many elements. A more efficient approach is to utilize the forEach() method on an array of the elements:

let elementsArray = document.querySelectorAll("whatever");

elementsArray.forEach(function(elem) {
    elem.addEventListener("input", function() {
        // This function does stuff
    });
});

By iterating through the array, this code assigns the event listener to each element in a single line, simplifying your code and streamlining the event-handling process.

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