Add 404.html file to enable routing for GH Pages (#266)

waalbert · web-flow · commit e86c3f0e598e · 2024-05-23T21:52:06.000-07:00
diff --git a/404.html b/404.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<html>
+	<head>
+		<meta charset="utf-8" />
+		<title>Single Page Apps for GitHub Pages</title>
+		<script type="text/javascript">
+			// Single Page Apps for GitHub Pages
+			// MIT License
+			// https://github.com/rafgraph/spa-github-pages
+			// This script takes the current url and converts the path and query
+			// string into just a query string, and then redirects the browser
+			// to the new url with only a query string and hash fragment,
+			// e.g. https://www.foo.tld/one/two?a=b&c=d#qwe, becomes
+			// https://www.foo.tld/?/one/two&a=b~and~c=d#qwe
+			// Note: this 404.html file must be at least 512 bytes for it to work
+			// with Internet Explorer (it is currently > 512 bytes)
+
+			// If you're creating a Project Pages site and NOT using a custom domain,
+			// then set pathSegmentsToKeep to 1 (enterprise users may need to set it to > 1).
+			// This way the code will only replace the route part of the path, and not
+			// the real directory in which the app resides, for example:
+			// https://username.github.io/repo-name/one/two?a=b&c=d#qwe becomes
+			// https://username.github.io/repo-name/?/one/two&a=b~and~c=d#qwe
+			// Otherwise, leave pathSegmentsToKeep as 0.
+			var pathSegmentsToKeep = 0;
+
+			var l = window.location;
+			l.replace(
+				l.protocol +
+					"//" +
+					l.hostname +
+					(l.port ? ":" + l.port : "") +
+					l.pathname
+						.split("/")
+						.slice(0, 1 + pathSegmentsToKeep)
+						.join("/") +
+					"/?/" +
+					l.pathname
+						.slice(1)
+						.split("/")
+						.slice(pathSegmentsToKeep)
+						.join("/")
+						.replace(/&/g, "~and~") +
+					(l.search ? "&" + l.search.slice(1).replace(/&/g, "~and~") : "") +
+					l.hash
+			);
+		</script>
+	</head>
+	<body></body>
+</html>
diff --git a/index.html b/index.html
@@ -26,6 +26,36 @@
 			crossorigin="anonymous"
 		/>
 		<title>VenusHacks 2024</title>
+		<!-- Start Single Page Apps for GitHub Pages -->
+		<script type="text/javascript">
+			// Single Page Apps for GitHub Pages
+			// MIT License
+			// https://github.com/rafgraph/spa-github-pages
+			// This script checks to see if a redirect is present in the query string,
+			// converts it back into the correct url and adds it to the
+			// browser's history using window.history.replaceState(...),
+			// which won't cause the browser to attempt to load the new url.
+			// When the single page app is loaded further down in this file,
+			// the correct url will be waiting in the browser's history for
+			// the single page app to route accordingly.
+			(function (l) {
+				if (l.search[1] === "/") {
+					var decoded = l.search
+						.slice(1)
+						.split("&")
+						.map(function (s) {
+							return s.replace(/~and~/g, "&");
+						})
+						.join("?");
+					window.history.replaceState(
+						null,
+						null,
+						l.pathname.slice(0, -1) + decoded + l.hash
+					);
+				}
+			})(window.location);
+		</script>
+		<!-- End Single Page Apps for GitHub Pages -->
 	</head>
 	<body>
 		<div id="root"></div>
