Domma v0.51.0

v0.51.0 - Lists Without the Boilerplate (2026-09-29)

Binding expressions can now ask questions of a list. Twelve array helpers ship built in - no
M.registerHelper needed - so "is it empty?", "how many are done?" and "only the open ones" no longer
each need a computed.

🧮 Built-in array helpers (domma-reactive 1.3.0)

• len, includes, some, every, count, where, sum, pluck, sortBy, first, last and join, callable from any data-bind-*, data-if, data-each or {{ }} expression.
• They take an M.observable or observable array directly (len(todos)), read observable fields on each row (count(todos, 'done')), and those reads are tracked - ticking one row re-runs the count.
• where and sortBy return new arrays, so they can drive a list: data-each="where(todos, 'done', false) key=id".
• Keys may be dotted paths ('meta.tag') and go through the same prototype guard as every other read. A helper you register under the same name still wins.

🔁 domma-reactive 1.3.0

• Domma is now built against domma-reactive 1.3.0 - see its release notes.