Add parseCookie and serializeCookie

snippets/serializeCookie.md

@@ -0,0 +1,13 @@
+### serializeCookie
+
+Serialize a cookie name-value pair into a Set-Cookie header string.
+
+Use template literals and `encodeURIComponent()` to create the appropriate string.
+
+```js
+const serializeCookie = (name, val) => `${encodeURIComponent(name)}=${encodeURIComponent(val)}`;
+```
+
+```js
+serializeCookie('foo', 'bar'); // 'foo=bar'
+```