Created
January 24, 2018 23:35
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Test IndexedDB + microtasks #2
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| <!doctype html> | |
| <html> | |
| <head> | |
| <title>Demo of IndexedDB + microtasks Test 2</title> | |
| </head> | |
| <body> | |
| <h1>Demo of IndexedDB + microtasks Test 2</h1> | |
| <pre id="display"></pre> | |
| <script> | |
| (function () { | |
| function log(str) { | |
| document.getElementById('display').textContent += str + '\n' | |
| } | |
| var openReq = indexedDB.open('mydb', 1) | |
| openReq.onupgradeneeded = function (e) { | |
| var db = e.target.result | |
| var store = db.createObjectStore('keyvalue', {keyPath: 'key'}) | |
| store.put({key: 'foo', value: 'bar'}) | |
| } | |
| openReq.onsuccess = function (e) { | |
| var db = e.target.result | |
| var tx = db.transaction('keyvalue', 'readwrite') | |
| var store = tx.objectStore('keyvalue') | |
| log('get()') | |
| new Promise(function (resolve, reject) { | |
| store.get('foo').onsuccess = function (e) { | |
| log('get() onsuccess with result: ' + JSON.stringify(e.target.result)) | |
| resolve(e.target.result) | |
| } | |
| }).then(function (result) { | |
| log('promise callback with result: ' + JSON.stringify(result)) | |
| log('put()') | |
| var req | |
| try { | |
| req = store.put({key: 'foo', value: 'bar'}) | |
| } catch (e) { | |
| log('put() error: ' + e) | |
| } | |
| req.onsuccess = function () { | |
| log('put() onsuccess') | |
| } | |
| req.onerror = function () { | |
| log('put() onerror') | |
| } | |
| }) | |
| tx.oncomplete = function () { | |
| log('transaction: oncomplete') | |
| } | |
| tx.onerror = function (e) { | |
| log('transaction: onerror: ' + e.target.error) | |
| } | |
| } | |
| })() | |
| </script> | |
| </body> | |
| </html> |
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