Improve jsr support from homepage

Author: danopia

lib/resolve.ts

@@ -14,6 +14,10 @@ export async function findModuleSlug(modUrl: string) {
       return `https/raw.githubusercontent.com/${owner}/${repo}/${ref}/${path.join('/') || 'deps.ts'}`;
     }
   }
+  // convert jsr URLs into jsr specifiers
+  if (url.host === 'jsr.io') {
+    return `jsr/${url.pathname.slice(1)}`;
+  }
 
   return `${url.protocol.slice(0, -1)}/${url.host}${url.pathname}`;
 }

public/index.html

@@ -68,7 +68,7 @@ <h2>
   <form id="dependencies-of" action="/dependencies-of/" method="GET"
       style="display: flex; flex-direction: row;">
     <input type="url" name="url" class="url" required autofocus style="flex: 1;"
-        placeholder="Module URL (e.g. https://deno.land/x/opine/mod.ts)" pattern="https://.+" />
+        placeholder="Module URL (e.g. https://deno.land/x/opine/mod.ts, jsr:@dbushell/http-tunnel)" pattern="https://.+|jsr:.+" />
     <button type="submit">Visualize!</button>
   </form>