feat: add transparent
webpreference to webview (#40301)
* feat: add transparent option to WebContents * feat: add transparent attribute to webview * test: add tests for webview transparent attribute * docs: add transparent attribute to webview docs * fix: run tests on macOS only * refactor: remove unneeded html tag * fix: only apply transparent option to guests * refactor: correct comment * refactor: use opaque instead Retains current webview behaviour by default. * fix: correct variable name to guest_opaque_ * refactor: use transparent webpreference * docs: remove unused web preference * fix: uncomment condition for transparency test * docs: converted to list format and linked to MDN * fix: make webviews transparent by default again * fix: rebase error --------- Co-authored-by: Cheng Zhao <zcbenz@gmail.com>
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@ -221,7 +221,9 @@ windows. Popups are disabled by default.
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A `string` which is a comma separated list of strings which specifies the web preferences to be set on the webview.
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The full list of supported preference strings can be found in [BrowserWindow](browser-window.md#new-browserwindowoptions).
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The full list of supported preference strings can be found in [BrowserWindow](browser-window.md#new-browserwindowoptions). In addition, webview supports the following preferences:
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* `transparent` boolean (optional) - Whether to enable background transparency for the guest page. Default is `true`. **Note:** The guest page's text and background colors are derived from the [color scheme](https://developer.mozilla.org/en-US/docs/Web/CSS/color-scheme) of its root element. When transparency is enabled, the text color will still change accordingly but the background will remain transparent.
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The string follows the same format as the features string in `window.open`.
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A name by itself is given a `true` boolean value.
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