Chainable modifiers?

[otherdaniel]

This came up when editing the "modify-able config" PR, #237: Should the modifier methods return a reference to [=this=], so that you can 'chain' methods?

sanitizer.allowElement("a").allowElement("span");

A precedent might be JavaScript Set type

[annevk]

The web platform doesn't do this. We reserve return values in case we might want to return something useful at some point.

See w3ctag/design-principles#286.