* frontend: remove deprecated iframe attrs and non-standard CSS
Three separate cleanups:
1. remove deprecated HTML attributes from iframe creation (create-iframe.ts)
- frameborder="0": deprecated since HTML5; border is already set to none via CSS
- allowtransparency="true": non-standard Microsoft attribute never in any spec;
transparency is handled by body { background: transparent } in CSS instead
- scrolling="no": deprecated since HTML5; overflow is already hidden via CSS
- horizontalscrolling/verticalscrolling: non-standard IE-era attributes with
no effect in modern browsers; remove without replacement
2. replace allowtransparency with explicit CSS (global.css)
- add background: transparent to body; this is the spec-correct way to make
an iframe document transparent, as documented by MDN
3. drop -moz-touch-enabled media query prefix (5 comment CSS files)
- -moz-touch-enabled was a Firefox-only non-standard media feature removed
in Firefox 58 (2018); pointer: coarse is the standard equivalent and was
already present as the second condition in every query, so removing the
dead -moz prefix reduces the media query to just (pointer: coarse)
note: colorScheme: 'none' in create-iframe.ts is intentionally left unchanged;
it is tracked by #1430 and requires a broader color-scheme implementation
* frontend: fix CSS bugs and replace deprecated properties
Bugs fixed:
- comment-votes.module.css: add missing comma between transition values;
without it the shorthand was invalid and colour transitions on vote
buttons were silently ignored
- icon-button.module.css: fix "transfrom" typo (should be "transform");
the misspelling made the transition declaration a no-op, so the hover
scale animation jumped instantly instead of easing
- auth.module.css: remove doubly-nested rgb(rgb(var(…))) call; the outer
rgb() rejected the inner rgb() result, so the .title element's colour
fell back to inherited instead of the intended --secondary-text-color
Deprecated properties replaced:
- comment-form__markdown-toolbar.css: replace deprecated clip: rect()
with clip-path: inset(50%); clip was deprecated in CSS Masking Level 1
- raw-content.css: replace word-wrap with overflow-wrap; word-wrap was
renamed in CSS Text Level 3, all current browsers support overflow-wrap
- global.css: remove redundant literal-colour fallback lines before
var() declarations in .preloader and .preloader_view_iframe; the var()
calls already have inline fallback values (e.g. var(--color6, #fff)),
making the preceding duplicate property and its stylelint-disable
comment unnecessary since IE11 EOL
* move border:none from inline style to widget__comments-frame class
Dmitry VerkhoturovandGitHub
c26f45e55e