JavaScript change Event

The change event in JavaScript is triggered when the value of an input element or a form control has changed. It occurs when the user interacts with the element and modifies its value.

The change event is commonly used with form elements such as <input>, <select>, and <textarea>. It can also be used with checkboxes, radio buttons, and other input types.

Here’s an example of how to handle the change event:

var inputElement = document.getElementById("myInput");

inputElement.addEventListener("change", function(event) {
  // Handle the change event
  var newValue = event.target.value;
  console.log("New value: " + newValue);
});

In this example, the addEventListener() method is used to attach a change event listener to the input element with the ID "myInput".

Inside the event listener callback function, you can access the new value of the input element using event.target.value. The event object provides information about the event, and event.target refers to the element on which the event occurred.

In the example code, the new value of the input element is logged to the console. You can replace this code with your own logic to handle the change event based on your specific requirements.

By running this code, whenever the user changes the value of the input element (e.g., by typing in a new value or selecting a different option in a dropdown), the change event will be triggered, and the provided callback function will be executed, allowing you to perform actions or update the application state based on the new value.