lighthouserc.js

/*
 * For details on the Lighthouse CI configuration API, see:
 * https://github.com/GoogleChrome/lighthouse-ci/blob/master/docs/configuration.md
 */

module.exports = {
  ci: {
    collect: {
      staticDistDir: "./public",
      // if new page types are added to the site, they must be added here also
      url: [
        "/",
        "/about/",
        "/issues/",
        "/issues/1/",
        "/issues/1/data-beyond-vision/",
        "/issues/4/",
        "/issues/4/sonorous-medieval/",
        "/issues/4/toward-deep-map/",
        "/authors/",
        "/404.html"
    ]
    },
    assert: {
      preset: "lighthouse:no-pwa",
      assertions: {
        /* Can't find an explicit mapping from mailures to IDs.
        However, in the Lighthouse interface, the div's ID is the key.
        A list of SOME tests:
        https://github.com/GoogleChrome/lighthouse-ci/blob/72107f3bf462ab60596f576967ff1a5e0aad622b/packages/utils/src/presets/all.js
        IDs are also available in GH Actions output. */

        /* color contrast check reports incorrect results on issue page and
           on 404 page footer due to the way content is actually rendered; so
           we switch it to a warning */
        "color-contrast": "warn",

        /* 3rd-party fonts included by e.g. sketchfab don't use font-display,
           so we have to switch it to a warning */
        "font-display": "warn",

        // some tap target warnings (adjacent DOIs, author/about links in footer)
        "tap-targets": "warn",
        // flagging an outdated aria role in footnotes generated by hugo/goldmark;
        // already resolved in goldmark https://github.com/yuin/goldmark/issues/258
        // should be resolved in hugo at some point
        "aria-required-children": "warn",

        // switch misc. performance issues to warnings until they are resolved
        "unsized-images": "warn",
        "uses-responsive-images": "warn",
        "offscreen-images": "warn",
        "uses-rel-preconnect": "warn",
        "uses-passive-event-listeners": "warn",
        "uses-optimized-images": "warn",
        "unused-javascript": "warn",
        "unused-css-rules": "warn",
        "total-byte-weight": "warn",
        "uses-webp-images": "warn",

        // kaltura errors to ignore
        "errors-in-console": "warn",
        "no-document-write": "warn",
        "uses-text-compression": "warn",

        // backward-forward cache
        "bf-cache": "warn",
        // ensure CSP is effective against XSS attacks
        // no warning in lighthouse report, maybe not checking?
        "csp-xss": "warn",

        // error specific to external asset in SW4 Budak/Rominger piece;
        // remove once we remove that article from urls to check with lighthouse
        "inspector-issues": "warn",
      }
    },
    upload: {
      target: "temporary-public-storage",
    },
  },
};