Add comments and cleanup

.gitignore

@@ -1,2 +1,2 @@
 node_modules
-public/out
+public

src/App.svelte

@@ -1,9 +1,6 @@
 <script>
 	import Router from 'svelte-spa-router'
 	import Index from './index.svelte';
-	const themes = [
-		'default'
-	]
 
 	const routes = {
 		'/': Index

src/index.svelte

@@ -1,6 +1,7 @@
 <script>
 	import { onMount } from 'svelte';
 	import Lightbox from './lightbox.svelte';
+
 	let file_list;
 	let open;
 	let thumb_list = [];
@@ -16,14 +17,17 @@
 			.then(resp => resp.text())
 			.then(data => data.split('\n'));
 
-		// Loop backwards efficiently
+		// Loop backwards efficiently.
 		for (let i = file_list.length - 2; i >= 0; i--) {
 			const file = file_list[i];
+
+			// Thumbs are only ever .jpg
 			thumb_list.push(file.substr(0, file.lastIndexOf('.')) + '.jpg');
 		}
 	});
 	
 	function open_lightbox(i) {
+		// If `open' is already `i' updates aren't sent to lightbox.
 		open = null; 
 		open = i;	
 	}

src/lightbox.svelte

@@ -11,6 +11,7 @@
 	$: image = open !== null && open >= 0 ? set_images()  : '';
 	$: is_open(open);
 
+	// This needs renamed
 	function is_open(i) {
 		if (should_open && i !== null &&  i >= 0) {
 			class_list += ' open'
@@ -85,7 +86,7 @@
     width: 100vw;
     height: 100vh;
     opacity: 1;
-    transition: opacity 1s;
+    transition: opacity 1s; /* This is being applied when we add `slide_classes' */
 		display: flex;
     justify-content: center;
     align-items: center;
@@ -96,7 +97,6 @@
     background-color: rgba(0,0,0,0.7);
     z-index: 0;
   }
-
 </style>
 
 <svelte:window on:keydown={handle_keys} />