loading a local file (file:///) using polymer will fail to load properly

[dinhvh]

To reproduce:
Once you checked out polymer-all, try to load an example from the disk.

By loading file://localhost/.../polymer-all/polymer-ui-elements/polymer-ui-toolbar/index.html in Chrome, I get the following console error:

XMLHttpRequest cannot load file://localhost/Users/dvh/Polymer/polymer-all/polymer-ui-elements/polymer-ui-toolbar/polymer-ui-toolbar.html. Cross origin requests are only supported for HTTP. index.html:1
Uncaught NetworkError: A network error occurred. 

Workaround:
You have to set up a web server to try your code.

[dfreedm]

This is a Chrome default security setting: https://code.google.com/p/chromium/issues/detail?id=37586. You can override with the --allow-file-access-from-files flag.

[dinhvh]

From a user of UI widgets perspective, when I used bootstrap, I didn't have that kind of issues.
It would be great if Polymer would match the same kind of "usability".

[dfreedm]

There's nothing we can do about this case until HTMLImports are native. Even then, I'm not sure that they would allow file:// access.

[dinhvh]

If native HTMLImports solves this issue, that's probably fine.