HTML

Four attributes are the whole markup surface of the framework.

Attribute	Declares
data-component	which components this element runs
data-mount	when they mount
data-ref	that this element is a named part of a component
data-option-<name>	the value of one declared option

Every one of them follows the same grammar:

data-<namespace>[:<qualifier>[.<part>…]]

The colon selects one member of the vocabulary the namespace declares, which is why an attribute the framework reads holds at most one colon. See The attribute grammar.

What is not an attribute

• data-load — the mount and the import are one decision, so data-mount says it.
• <tk-name> tag sugar and lowercase arbitrary-selector registrations — removed.
• A breakpoint list suffix such as :xxs:xs:s — a suffix names one breakpoint and cascades.
• A range form or a breakpoint-list form — neither exists.

Watching your own

attributeFilter takes exact names and the DOM has no wildcard, so the engine cannot see an attribute the framework cannot name. Two opt-ins cover the rest:

• watchAttributes() — every attribute of one element.
• watchAttributeNamespace() — a namespace whose names cannot be enumerated, with keyed bindings.