Adding the sqlite sourcecode

ext/wasm/demo-123-worker.html

@@ -0,0 +1,44 @@
+<!doctype html>
+<html lang="en-us">
+  <head>
+    <meta charset="utf-8">
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+    <link rel="shortcut icon" href="data:image/x-icon;," type="image/x-icon">
+    <title>Hello, sqlite3</title>
+    <style>
+      .warning, .error {color: red}
+      .error {background-color: yellow}
+      body {
+          display: flex;
+          flex-direction: column;
+          font-family: monospace;
+          white-space: break-spaces;
+      }
+    </style>
+  </head>
+  <body>
+    <h1>1-2-sqlite3 worker demo</h1>
+    <script>(function(){
+      const logHtml = function(cssClass,...args){
+        const ln = document.createElement('div');
+        if(cssClass) ln.classList.add(cssClass);
+        ln.append(document.createTextNode(args.join(' ')));
+        document.body.append(ln);
+      };
+      const w = new Worker("demo-123.js?sqlite3.dir=jswasm"
+                           /* Note the URL argument on that name. See
+                              the notes in demo-123.js (search for
+                              "importScripts") for why we need
+                              that. */);
+      w.onmessage = function({data}){
+        switch(data.type){
+            case 'log':
+              logHtml(data.payload.cssClass, ...data.payload.args);
+              break;
+            default:
+              logHtml('error',"Unhandled message:",data.type);
+        };
+      };
+    })();</script>
+  </body>
+</html>