UUID and URL redirection

snippets/UUID-generator.md

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+### UUID generator
+
+Use `crypto` API to generate a UUID, compliant with [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) version 4.
+
+```js
+var uuid = _ =>
+  ( [1e7]+-1e3+-4e3+-8e3+-1e11 ).replace( /[018]/g, c =>
+    (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
+  )
+```

snippets/redirect-to-url.md

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+### Redirect to URL
+
+Use `window.location.href` or `window.location.replace()` to redirect to `url`.
+Pass a second argument to simulate a link click (`true` - default) or an HTTP redirect (`false`).
+
+```js
+var redirect = (url, asLink = true) =>
+  asLink ? window.location.href = url : window.location.replace(url);
+```