How to use Inline Event Handlers In Javascript

Using removeEventListener()

To remove an event handler using inline event handlers in JavaScript, we can directly set the corresponding attribute to an empty string or null. Here, onEventName can be events like onclick, onmouseover, etc. An alert is shown indicating that the button was clicked. After the button is clicked once, the inline event handler is removed by setting onclick to null. This ensures that subsequent clicks on the button won’t trigger any action.

Example: The below example uses Inline Event Handlers to Remove Event Handlers in JavaScript.

HTML

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" 
          content="width=device-width, initial-scale=1.0">
    <title>Remove Inline Event Handler Example</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            text-align: center;
            margin-top: 50px;
        }

        h1 {
            color: green;
            text-align: center;
        }

        #myButton {
            padding: 10px 20px;
            font-size: 16px;
            background-color: #4CAF50;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }

        #myButton:hover {
            background-color: #45a049;
        }
    </style>
</head>

<body>
    <h1>w3wiki</h1>
    <button id="myButton" onclick="handleClick()">
      Click me!
      </button>

    <script>
        
          // Function to handle button click
        function handleClick() {
            alert("Button clicked!");
            
              // Remove inline event handler from button
            document.getElementById('myButton').onclick = null;
        }
    </script>
</body>

</html>

Output:

How to Remove Event Handlers in JavaScript ?

In JavaScript, event handlers are functions attached to HTML elements to respond to specific events like clicks or mouse movements. Removing event handlers effectively detaches the specified function from listening to that particular event on that element.

Table of Content

Using removeEventListener()
Using inline event handlers

Tags:

#JavaScript-Questions #JavaScript #Web Technologies

Using removeEventListener()

How to use Inline Event Handlers In Javascript

How to Remove Event Handlers in JavaScript ?

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