In the CSS, a class selector is a name preceded by a full stop (“.”) and an ID selector is a name preceded by a hash character (“#”).
The difference between an ID and a class is that an ID can be used to identify one element, whereas a class can be used to identify more than one.

Filme de actiune

Neque porro quisquam est qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit...

Filme documentare

Neque porro quisquam est qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit...

Filme romantice

Neque porro quisquam est qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit...

The width and height attribute values are specified in pixels by default, but you can also set these values in percentage,
such as 50%, 100% and so on. The default width of an iframe is 300 pixels, whereas the default height is 150 pixels.

Border red

No border

Iframe - Target for a Link

When the target of a link matches the name of an iframe, the link will open in the iframe.