68 lines
2.4 KiB
JavaScript
68 lines
2.4 KiB
JavaScript
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// For perf reasons, this script is run inline to quickly set certain styles.
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// To allow CSP to work correctly, we also calculate a sha256 hash during
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// the build process and write it to checksum.js.
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import { INLINE_THEME, DEFAULT_THEME, switchToTheme } from '../routes/_utils/themeEngine'
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import { basename } from '../routes/_api/utils'
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import { onUserIsLoggedOut } from '../routes/_actions/onUserIsLoggedOut'
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import { storeLite } from '../routes/_store/storeLite'
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window.__themeColors = process.env.THEME_COLORS
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const {
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currentInstance,
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instanceThemes,
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disableCustomScrollbars,
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enableGrayscale
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} = storeLite.get()
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const theme = (instanceThemes && instanceThemes[currentInstance]) || DEFAULT_THEME
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if (currentInstance) {
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// Do prefetch if we're logged in, so we can connect faster to the other origin.
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// Note that /api/v1/instance is basically the only URL that doesn't require credentials,
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// which is why we can do this. Also we do end up calling this on loading the home page,
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// so it's not a wasted request.
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let link = document.createElement('link')
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link.setAttribute('rel', 'prefetch')
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link.setAttribute('href', `${basename(currentInstance)}/api/v1/instance`)
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link.setAttribute('crossorigin', 'anonymous')
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document.head.appendChild(link)
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}
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if (theme !== INLINE_THEME) {
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// switch theme ASAP to minimize flash of default theme
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switchToTheme(theme, enableGrayscale)
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}
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if (enableGrayscale) {
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document.getElementById('theGrayscaleStyle')
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.setAttribute('media', 'all') // enables the style
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}
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if (!currentInstance) {
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// if not logged in, show all these 'hidden-from-ssr' elements
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onUserIsLoggedOut()
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}
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if (disableCustomScrollbars) {
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document.getElementById('theScrollbarStyle')
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.setAttribute('media', 'only x') // disables the style
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}
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// hack to make the scrollbars rounded only on macOS
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if (/mac/i.test(navigator.platform)) {
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document.documentElement.style.setProperty('--scrollbar-border-radius', '50px')
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}
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// Versions of iOS Safari before iOS 12.2 do not work properly as a PWA
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// for cross-origin authentication: https://github.com/nolanlawson/pinafore/issues/45
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// Here we sniff for iOS <12.2 by checking for the existence of a native IntersectionObserver
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// function, which was added in 12.2.
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if (/iP(?:hone|ad|od)/.test(navigator.userAgent) &&
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!(typeof IntersectionObserver === 'function' &&
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IntersectionObserver.toString().includes('[native code]'))) {
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document.head.removeChild(document.getElementById('theManifest'))
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}
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