Fix "ready" state for viewer API

tify-iiif-viewer / tify

TIFY is a slim and mobile-friendly IIIF document viewer.

GNU Affero General Public License v3.0

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Fix "ready" state for viewer API #168

Closed t11r closed 4 months ago

t11r commented 4 months ago

Add promise creator so every component can define ready conditions, use it in scan component so "ready" is only fulfilled after viewer has been initialized.

Resolves #164