[Image v3] #2263: Add fetchpriority attribute support

Open aldunchev opened this issue 3 months ago • 2 comments

Q A

Fixed Issues? Fixes #2263

Patch: Bug Fix? no

Minor: New Feature? Yes

Major: Breaking Change? no

Tests Added + Pass? Yes

Documentation Provided Yes (code comments and or markdown)

Any Dependency Changes? No

License Apache License, Version 2.0

Q	A
Fixed Issues?	`Fixes #2263`
Patch: Bug Fix?	no
Minor: New Feature?	Yes
Major: Breaking Change?	no
Tests Added + Pass?	Yes
Documentation Provided	Yes (code comments and or markdown)
Any Dependency Changes?	No
License	Apache License, Version 2.0

Add fetchpriority attribute support to Image component (v3)

Implements fetchpriority attribute for the Image component to optimize Largest Contentful Paint (LCP) performance.

Changes:

Added policy-level configuration in design dialog (default fetchpriority + override toggle)
Added component-level override in edit dialog
Implemented decision logic: component value overrides policy value (if allowed)
Added getFetchPriority() method and updated getHtmlAttributes() in Image interface
Added 5 unit tests covering all scenarios

Usage:

Template authors can set default fetchpriority ("high", "low", "auto") in policies and optionally allow content authors to override per component. Useful for marking hero images as "high" priority to improve LCP.

Fixes #2263