Every asset the tour needs, checked from this file

Open this page from the laptop that will present, offline. Each line below is an asset the tour loads; the page tries to load it now and reports found or missing. No network is used. If everything reads found, the tour works from file://.

checking…

Fonts are checked with the browser's font-loading API; images and stylesheets by loading them; pages by opening them in a hidden frame and waiting for the one-line message every generated page posts to its parent. A page that stays silent for eight seconds is reported missing.