HTML suspend DOM Event: Reference and Examples

When someone interacts with a webpage, the browser sends events to the relevant JavaScript code. The suspend event happens when the browser intentionally stops fetching media data.

When suspend happens

The browser intentionally stops fetching media data.

You can listen for it using addEventListener(). That keeps event handling separate from HTML attributes such as onclick and works well with modern code organization.

A small working example

<video id="demo-target" controls preload="metadata" width="320">
    <source src="sample-video.mp4" type="video/mp4">
</video>
<p id="event-status" role="status">Waiting for suspend...</p>
<script>
    const eventTarget = document.getElementById("demo-target");
    const eventStatus = document.getElementById("event-status");

    if (eventTarget) {
        eventTarget.addEventListener("suspend", (eventDetails) => {
            eventStatus.textContent = "suspend event received";
            console.log(eventDetails.type, eventDetails.target);
        });
    }
</script>

Reading the code

The browser listens for suspend on the relevant target. When the event occurs, the callback receives eventDetails, updates the status message and logs the event name and target in Developer Tools.

Use preload=metadata or none; this is not necessarily an error.

To test this example, put a real supported media file at the shown path. Events tied to buffering or download behavior may not fire in the same order on every connection. An unavailable sample file is not proof that your event listener is broken.

Try it in your browser

Open the page, show the Console panel, and follow this test: Use preload=metadata or none; this is not necessarily an error. Then change one thing in the example and observe whether the event still fires.

Common Beginner Mistakes

• Expecting suspend to fire without its required user action or browser condition.
• Use preload=metadata or none; this is not necessarily an error.
• Adding repeated event listeners without considering cleanup or unwanted side effects.

Key Takeaways

• suspend reports the browser intentionally stops fetching media data.
• addEventListener("suspend", ...) listens for the event on the appropriate target.
• Use preload=metadata or none; this is not necessarily an error.