update readme

README.md

@@ -38,3 +38,19 @@ to this in your browser, and you can call your Go code from devtools.
 
 To build a redistributable, production mode package, use `wails build`.
 
+## Tricks:
+
+### Inputs for date objects
+```svelte
+<div class="m-5">
+<Label>Start</Label>
+<Input
+  type="datetime-local"
+  value={session.Start.toISOString().slice(0, 16)}
+  onchange={(e) => {
+    // @ts-ignore
+    session.Start = new Date(e.target.value);
+  }}
+  required
+/>
+```