Bug 216795
| Summary: | System color 'canvas' cannot be set or read | ||
|---|---|---|---|
| Product: | WebKit | Reporter: | Дилян Палаузов <dpa-webkit> |
| Component: | CSS | Assignee: | Nobody <webkit-unassigned> |
| Status: | NEW | ||
| Severity: | Normal | CC: | emilio, koivisto, megan_gardner, simon.fraser, timothy, webkit-bug-importer |
| Priority: | P2 | Keywords: | InRadar |
| Version: | WebKit Nightly Build | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
Дилян Палаузов
The way to obtain the default background color set by the user, is to call
function getDefaultBackgroundColor() {
let div = document.createElement("div");
div.style.backgroundColor = "canvas";
document.documentElement.appendChild(div);
let color = getComputedStyle(div).backgroundColor;
div.remove();
return color;
}
This does not work with WebKitGTK 2.28.1/Epiphany 3.36.4. In particular it allows setting custom CSS, and body.background-color in it, but it is unclear how to use the Canvas keyword as calor there.
• How to configure WebKit to change the default canvas system colour, in terms of https://www.w3.org/TR/css-color-4/#css-system-colors
• Please make the snippet above work.
See also https://bugzilla.mozilla.org/show_bug.cgi?id=1666127 and https://gitlab.gnome.org/GNOME/epiphany/-/issues/1344
| Attachments | ||
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| Add attachment proposed patch, testcase, etc. |
Emilio Cobos Álvarez (:emilio)
Ideally WebKit would support color: canvas and would allow users to change it, otherwise you need to use user stylesheets which don't reliably work.
Radar WebKit Bug Importer
<rdar://problem/69397317>