HTML Media Event Attributes Reference

This is a practical reference for track a media element's playback and buffering progress. Keep it nearby when you are writing a page, but do not worry about memorizing every entry at once.

What this reference covers

Track a media element's playback and buffering progress. The entries below summarize the most useful choices and what each one means.

See it in HTML

A small example shows how one of these ideas appears in a normal page:

<video id="lesson" controls src="lesson.mp4"></video>
<script>
    document.getElementById("lesson").addEventListener("ended", () => {
        console.log("Lesson completed");
    });
</script>

How to use the reference

Begin by identifying what the page is trying to achieve. Then choose the entry that describes that job, instead of choosing a setting merely because it looks familiar.

Read the code from the outer element inward. Pay attention to attribute names, tag nesting, and any links between elements through IDs. A browser may accept some incorrect markup, but accepting it is not the same as using it correctly.

A useful check before publishing

Try changing one choice in the example while keeping the rest of the page the same. Inspect the result in your browser. For compatibility-sensitive features, test another browser; for accessibility-sensitive features, use keyboard navigation and an accessibility inspector.

Some entries describe browser hints rather than guarantees. User input still needs server-side validation, and event-based behavior needs JavaScript even if the HTML describes the control.

Recommended approach: Inline event handler attributes exist in HTML references, but addEventListener() in a separate JavaScript file is usually easier to maintain and works better with strict Content Security Policy settings.

Common Beginner Mistakes

• Treating every item in a reference list as interchangeable instead of choosing the one that matches the job.
• Copying reference markup without checking the element’s surrounding context or required attributes.
• Assuming one successful browser test proves the markup is accessible or universally supported.

Key Takeaways

• Track a media element's playback and buffering progress.
• Pick a setting for its meaning, then test the smallest working example.
• HTML references are most useful when combined with validation, browser inspection, and accessibility testing.