Update EXPLAINER.md

Make it explicit that file references can not only be serialized, but also postMessaged. Fixes #7
WICG · Aug 1, 2018 · bd28fc8 · bd28fc8
1 parent 6b552a2
commit bd28fc8
Showing 1 changed file with 18 additions and 0 deletions.
diff --git a/EXPLAINER.md b/EXPLAINER.md
@@ -108,6 108,24 @@ request.onsuccess = function(e) {
 }
 ```
 
 The fact that handles are serializable also means you can `postMessage` them around:
 
 ```javascript
 // In a service worker:
 self.addEventListener('some-hypothetical-launch-event', e => {
  // e.file is a FileSystemFileHandle representing the file this SW was launched with.
  let win = await clients.openWindow('bla.html');
  if (win)
  win.postMessage({openFile: e.file});
 });
 
 // In bla.html
 navigator.serviceWorker.addEventListener('message', e => {
  let file_ref = e.openFile;
  // Do something useful with the file reference.
 });
 ```
 
 Also possible to get access to an entire directory.
 
 ```javascript