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21 changes: 11 additions & 10 deletions builtins/amp-pixel.md
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Expand Up @@ -14,31 +14,32 @@ See the License for the specific language governing permissions and
limitations under the License.
-->

### <a name="amp-pixel"></a> `amp-pixel`
## <a name="amp-pixel"></a> `amp-pixel`

The `amp-pixel` element is meant to be used as a typical tracking pixel - to count page views.
The `amp-pixel` element is meant to be used as a typical tracking pixel to count page views.

#### Behavior
### Behavior

The `amp-pixel` component behaves like a simple tracking pixel `img`. It takes a single URL, but provides variables that can be replaced by the component in the URL string when making the request. See the `src` attribute for more information.

#### Attributes
### Attributes

**src**

A simple URL to send a GET request to when the tracking pixel is loaded.

#### Substitutions
### Substitutions

The `amp-pixel` allows all standard URL variable substitutions.
See [Substitutions Guide](../spec/amp-var-substitutions.md) for more info.
The `amp-pixel` allows all standard URL variable substitutions. See the [Substitutions Guide](../spec/amp-var-substitutions.md) for more information.

For example, this code:

For instance:
```html
<amp-pixel src="https://foo.com/pixel?RANDOM"></amp-pixel>
```
may make a request to something like `https://foo.com/pixel?0.8390278471201` where the RANDOM value is randomly generated upon each impression.

#### Styling
may make a request to something like `https://foo.com/pixel?0.8390278471201`, where the `RANDOM` value is randomly generated upon each impression.

### Styling

`amp-pixel` should not be styled.