implemented spaces, fixed login and signup, thought creation and space creation.

js/old/md_preview.js

@@ -0,0 +1,16 @@
+const textarea = document.querySelector('textarea');
+const preview = document.getElementById('md_preview');
+
+textarea.addEventListener('input', function() {
+  fetch('functions/preview.php', {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/x-www-form-urlencoded',
+    },
+    body: 'markdown=' + encodeURIComponent(this.value),
+  })
+    .then(response => response.text())
+    .then(data => {
+      preview.innerHTML = decodeURIComponent(data);
+    });
+});