| <!doctype html> |
| <meta charset="utf8"> |
| <title>Performs IndexedDB tasks in response to postMessage</title> |
| <script> |
| 'use strict'; |
| |
| self.addEventListener('message', async event => { |
| const action = event.data.action; |
| let response = null; |
| switch(action) { |
| case 'get-database-names': { |
| const dbInfos = await self.indexedDB.databases(); |
| response = dbInfos.map(dbInfo => dbInfo.name); |
| break; |
| } |
| |
| case 'delete-database': { |
| const dbName = event.data.name; |
| await new Promise((resolve, reject) => { |
| const request = indexedDB.deleteDatabase(dbName); |
| request.onsuccess = resolve; |
| request.onerror = reject; |
| }); |
| response = true; |
| break; |
| } |
| } |
| event.source.postMessage({ action, response }, event.origin); |
| window.close(); |
| }); |
| |
| // Make up for the fact that the opener of a cross-origin window has no way of |
| // knowing when the window finishes loading. |
| if (window.opener !== null) { |
| window.opener.postMessage({ action: null, response: 'ready' }, '*'); |
| } |
| </script> |
