svelte/site/content/tutorial/06-bindings/10-media-elements/text.md

---
title: Media elements
---

The `<audio>` and `<video>` elements have several properties that you can bind to. This example demonstrates a few of them.

On line 116, add `currentTime={time}`, `duration` and `paused` bindings:

```html
<video
	poster="https://sveltejs.github.io/assets/caminandes-llamigos.jpg"
	src="https://sveltejs.github.io/assets/caminandes-llamigos.mp4"
	on:mousemove={handleMousemove}
	on:mousedown={handleMousedown}
	bind:currentTime={time}
	bind:duration
	bind:paused
></video>
```

> `bind:duration` is equivalent to `bind:duration={duration}`

Now, when you click on the video, it will update `time`, `duration` and `paused` as appropriate. This means we can use them to build custom controls.

> Ordinarily on the web, you would track `currentTime` by listening for `timeupdate` events. But these events fire too infrequently, resulting in choppy UI. Svelte does better — it checks `currentTime` using `requestAnimationFrame`.

The complete set of bindings for `<audio>` and `<video>` is as follows — four *readonly* bindings...

* `duration` (readonly) — the total duration of the video, in seconds
* `buffered` (readonly) — an array of `{start, end}` objects
* `seekable` (readonly) — ditto
* `played` (readonly) — ditto

...and four *two-way* bindings:

* `currentTime` — the current point in the video, in seconds
* `playbackRate` — how fast to play the video, where `1` is 'normal'
* `paused` — this one should be self-explanatory
* `volume` — a value between 0 and 1