frontend: generic lazy loader for webcomponents (#8510)

After seeing #8111 use a webcomponent, I think that they are a neat usecase for Forgejo where most of the frontend is backend-generated, with some "island of enhancements".

I am considering using a webcomponent for the CITATION management (last occurrence of [`Blob.GetBlobContent`](https://codeberg.org/forgejo/forgejo/issues/8222)), however I noticed that the developer experience wasn't ideal.

With this PR it would be very easy to declare a webcomponent, which will be loaded only if needed (I converted `model-viewer` and `pdf-object` to this technique).

Some cleanup in the neighbor webcomponents.

## Testing

1) Create a new repository or use an existing one.
2) Upload a `.pdf` or `.glb`  file (such as https://codeberg.org/forgejo/forgejo/src/branch/forgejo/tests/testdata/data/viewer/Unicode%E2%9D%A4%E2%99%BBTest.glb)
3) Open the Network inspector and view the file in the repository.
    - After a short loading spinner, the PDF or 3D model should be rendered in a viewer
    - the related JS should have been loaded (e.g. http://localhost:3000/assets/js/model-viewer.494bf0cd.js)
    - visiting another page and check that this JS file isn't loaded

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8510
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Reviewed-by: 0ko <0ko@noreply.codeberg.org>
Reviewed-by: Beowulf <beowulf@beocode.eu>
Co-authored-by: oliverpool <git@olivier.pfad.fr>
Co-committed-by: oliverpool <git@olivier.pfad.fr>
This commit is contained in:
oliverpool 2025-07-23 04:10:50 +02:00 committed by Gusted
commit 83ea43cf49
14 changed files with 166 additions and 137 deletions

View file

@ -2,6 +2,7 @@
// SPDX-License-Identifier: MIT
// Some useful links:
// https://codeberg.org/forgejo/forgejo/src/branch/forgejo/web_src/js/webcomponents/relative-time.js
// https://www.unicode.org/cldr/charts/46/supplemental/language_plural_rules.html
// https://translate.codeberg.org/languages/$LANGUAGE_CODE/#information
// https://github.com/WeblateOrg/language-data/blob/main/languages.csv
@ -16,7 +17,7 @@ import (
"forgejo.org/modules/translation/i18n"
)
// The constants refer to indices below in `PluralRules` and also in i18n.js, keep them in sync!
// The constants refer to indices below in `PluralRules` and also in web_src/js/webcomponents/relative-time.js, keep them in sync!
const (
PluralRuleDefault = 0
PluralRuleBengali = 1