Sample page for `vertical-scroll`.

[googlechromelabs]

Sample page for `vertical-scroll`.

[ebidel]

Yea, the iframe embedding a demo is kinda hacky. I wanted to have every page be standalone and have the server send the correct headers, but it was easier to embed the demos in an iframe and toggle policies via allow :)

[ehsan-karamad]

I think even if the server would run and set the header to something like vertical-scroll 'none' we'd still have some issues to properly explain what the feature demos. vertical-scroll is mostly meaningful in dealing with embedded content.

I can see two solutions (there is possibly more of course):

• Get sample pages apply the change to a nested <iframe>. This is basically adding an <iframe> layer which makes some preparations before loading the actual test <iframe>. Some elements such as feature-allow-banner would have to be moved to the inner most frame. The general details and policy descriptions could (optionally) stay in the middle <iframe>.

• Add an embedder page initialization step which will be overridden for each policy (only vertical-scroll perhaps).

In all these two cases all we need to do for vertical-scroll is to add some spacer above or below the test frame so that it is quite visible what the feature does.