{"id":6289,"date":"2017-07-20T02:19:47","date_gmt":"2017-07-19T18:19:47","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=6289"},"modified":"2018-11-06T14:31:41","modified_gmt":"2018-11-06T06:31:41","slug":"html5-indexeddb-js-example","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2017\/07\/html5-indexeddb-js-example\/","title":{"rendered":"HTML5 indexedDB\u524d\u7aef\u672c\u5730\u5b58\u50a8\u6570\u636e\u5e93\u5b9e\u4f8b\u6559\u7a0b"},"content":{"rendered":"

by zhangxinxu<\/a> from http:\/\/www.zhangxinxu.com\/wordpress\/?p=6289<\/a>
\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u4f46\u9700\u5f97\u5230\u539f\u4f5c\u8005\u4e66\u9762\u8bb8\u53ef\uff0c\u540c\u65f6\u4fdd\u7559\u539f\u4f5c\u8005\u548c\u51fa\u5904\uff0c\u6458\u8981\u5f15\u6d41\u5219\u968f\u610f\u3002<\/p>\n

\/\/ zxx: \u672c\u6587\u5185\u5bb9\u8f83\u591a\uff0c\u6709\u4e00\u5b9a\u7684\u6df1\u5ea6\uff0c\u5efa\u8bae\u9884\u7559\u8db3\u591f\u7684\u65f6\u95f4\u9605\u8bfb\uff0c\u6216\u8005\u53ef\u4ee5\u5148\u9a6c\u540e\u770b~<\/span><\/p>\n

\u4e00\u3001indexedDB\u4e3a\u4f55\u66ff\u4ee3\u4e86Web SQL Database\uff1f<\/h3>\n

\u8ddf\u5c0f\u670b\u53cb\u7684\u6559\u80b2\u4ece\u6765\u6ca1\u6709\u4ec0\u4e48\u201c\u8d62\u5728\u8d77\u8dd1\u7ebf\u201d\u8fd9\u79cd\u8bf4\u6cd5\u4e00\u6837\uff0c\u5728\u524d\u7aef\u9886\u57df\uff0c\u4e5f\u4e0d\u662f\u54ea\u6765\u5148\u51fa\u6765\u54ea\u4e2a\u5c31\u5728\u65e5\u540e\u5f15\u9886\u98ce\u9a9a\u7684\u3002<\/p>\n

HTML5 indexedDB\u548cWeb SQL Database\u90fd\u662f\u672c\u5730\u6570\u636e\u5e93\u6570\u636e\u5b58\u50a8\uff0cWeb SQL Database\u6570\u636e\u5e93\u8981\u51fa\u6765\u7684\u66f4\u65e9\uff0c\u7136\u5e76\u5375\u3002\u4ece2010\u5e7411\u670818\u65e5W3C\u5ba3\u5e03\u820d\u5f03Web SQL database\u8349\u6848\u5f00\u59cb\uff0c\u5c31\u5df2\u7ecf\u6ce8\u5b9aWeb SQL Database\u6570\u636e\u5e93\u662f\u660e\u65e5\u9ec4\u82b1\u3002<\/p>\n

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\"indexedDB\u517c\u5bb9\u6027\u8868\"<\/p>\n

\"web<\/p>\n

\u53ef\u4ee5\u770b\u5230IE\u548cFirefox\u5e76\u4e0d\u652f\u6301Web SQL Database\uff0c\u57fa\u672c\u4e0a\u53ef\u4ee5\u65ad\u5b9a\u6c38\u8fdc\u4e5f\u4e0d\u4f1a\u652f\u6301\uff0c\u89c4\u8303\u90fd\u4e0d\u8ba4\u53ef\uff0c\u5b9e\u5728\u6ca1\u6709\u6d6a\u8d39\u7cbe\u529b\u53bb\u652f\u6301\u7684\u7406\u7531\u3002<\/p>\n

\u597d\uff0c\u73b0\u5728\u6211\u4eec\u77e5\u9053\u4e86indexedDB\u53d6\u4ee3Web SQL Database\u5927\u5c40\u5df2\u5b9a\uff0c\u90a3\u5927\u5bb6\u77e5\u9053\u4e3a\u4f55Web SQL Database\u4f1a\u88ab\u820d\u5f03\u5417\uff1f<\/p>\n

\u4e0b\u9762\u662f\u4e00\u6bb5Web SQL Database\u4ee3\u7801\uff1a<\/p>\n

database.transaction(function(tx) {\n    tx.executeSql(\"CREATE TABLE IF NOT EXISTS tasks (id REAL UNIQUE, text TEXT)\", []);\n}<\/pre>\n
\u53ef\u4ee5\u770b\u5230\u76f4\u63a5\u628aSQL\u8bed\u53e5\u5f04\u5230JS\u4e2d\u4e86\uff0c\u4e3b\u6d41\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u5373\u89c6\u611f\uff0c\u8fd9\u4e48\u8bbe\u8ba1\u770b\u4e0a\u53bb\u4f3c\u4e4e\u65e0\u53ef\u539a\u975e\uff0c\u4f46\u6070\u6070\u8fd9\u4e2a\u8bbe\u8ba1\u6210\u4e3a\u4e86Web SQL Database\u88ab\u820d\u5f03\u7684\u91cd\u8981\u539f\u56e0\u4e4b\u4e00\uff1a\u4e00\u662f\u5b66\u4e60\u6210\u672c\u9ad8\u4e86\u5f88\u591a\uff0cSQL\u867d\u7136\u672c\u8eab\u5e76\u4e0d\u590d\u6742\uff0c\u4f46\u8de8\u5ea6\u8f83\u5927\uff0c\u4f8b\u5982\u6211\u53f8\u73a9JS\u7684\u5de5\u7a0b\u5e08\u548c\u73a9SQL\u7684\u5de5\u7a0b\u5e08\u4e2d\u95f4\u8fd8\u9694\u4e86\u4e2a\u73a9php\u7684\u5de5\u7a0b\u5e08\uff1b\u4e8c\u662f\u672c\u8eab\u4f7f\u7528\u5f88\u4e0d\u65b9\u4fbf\uff0c\u9700\u8981\u628aJS\u5bf9\u8c61\u8f6c\u6362\u6210\u5173\u7cfb\u578b\u7684\u5b57\u7b26\u4e32\u8bed\u53e5\uff0c\u5f88\u5570\u55e6\u7684\u3002<\/p>\n
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 <\/th>\nWebSQL<\/th>\nIndexedDB<\/th>\n<\/tr>\n<\/thead>\n
\u4f18\u70b9<\/td>\n\u771f\u6b63\u610f\u4e49\u4e0a\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff0c\u7c7b\u4f3cSQLite\uff08SQLite\u662f\u9075\u5b88ACID\u7684\u8f7b\u578b\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff09<\/td>\n\n
    \n
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  • \u7531\u4e8e\u662fNoSQL\u6570\u636e\u5e93\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u8bbe\u5b9a\u6211\u4eec\u7684JavaScript\u5bf9\u8c61\u548c\u7d22\u5f15\u3002<\/li>\n
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    \n
  • \u89c4\u8303\u4e0d\u652f\u6301\u5566<\/li>\n
  • \u7531\u4e8e\u4f7f\u7528SQL\u8bed\u8a00\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u638c\u63e1\u548c\u8f6c\u6362\u6211\u4eec\u7684JavaScript\u5bf9\u8c61\u4e3a\u5bf9\u5e94\u7684\u67e5\u8be2\u8bed\u53e5\u3002<\/li>\n
  • \u975e\u5bf9\u8c61\u9a71\u52a8\u3002<\/li>\n<\/ul>\n<\/td>\n
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\u67e5\u8be2\u673a\u5236<\/td>\nSQL<\/td>\nCursor APIs<\/a>\uff0cKey Range APIs<\/a>\uff0c\u5e94\u7528\u7a0b\u5e8f\u4ee3\u7801<\/td>\n<\/tr>\n
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STOP!<\/p>\n
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1. \u5173\u7cfb\u578b\u6570\u636e\u5e93\u548c\u975e\u5173\u7cfb\u578b\u6570\u636e\u5e93<\/h4>\n
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var obj = {\n  key1: 'value1',\n  key2: 'value2',\n  key3: 'value3',\n  ...\n};<\/pre>\n
\u201c\u5173\u7cfb\u578b\u6570\u636e\u5e93\u201d\u5bf9\u4e00\u81f4\u6027\u8981\u6c42\u975e\u5e38\u4e25\u683c\uff0c\u4f8b\u5982\u8981\u5199\u5165100\u4e2a\u6570\u636e\uff0c\u524d99\u4e2a\u6210\u529f\u4e86\uff0c\u7ed3\u679c\u7b2c100\u4e2a\u4e0d\u5408\u6cd5\uff0c\u6b64\u65f6\u4e8b\u52a1\u4f1a\u56de\u6eda\u5230\u6700\u521d\u72b6\u6001\u3002\u8fd9\u6837\u4fdd\u8bc1\u4e8b\u52a1\u7ed3\u675f\u548c\u5f00\u59cb\u65f6\u5019\u7684\u5b58\u50a8\u6570\u636e\u5904\u4e8e\u4e00\u81f4\u72b6\u6001\u3002\u975e\u5e38\u9002\u5408\u94f6\u884c\u8fd9\u79cd\u5bf9\u6570\u636e\u4e00\u81f4\u6027\u8981\u6c42\u975e\u5e38\u9ad8\u7684\u573a\u666f\u3002\u4f46\u662f\uff0c\u8fd9\u79cd\u4e00\u81f4\u6027\u4fdd\u8bc1\u662f\u727a\u7272\u4e86\u4e00\u90e8\u5206\u6027\u80fd\u7684\u3002<\/p>\n
\u4f46\u662f\uff0c\u5bf9\u4e8e\u5fae\u535a\uff0cQQ\u7a7a\u95f4\u8fd9\u7c7bweb2.0\u5e94\u7528\uff0c\u4e00\u81f4\u6027\u5374\u4e0d\u662f\u663e\u5f97\u90a3\u4e48\u91cd\u8981\uff0c\u6bd4\u65b9\u8bf4\u670b\u53cbA\u770b\u6211\u7684\u4e3b\u9875\u548c\u670b\u53cbB\u770b\u6211\u7684\u4e3b\u9875\u4fe1\u606f\u6709\u4e0d\u4e00\u6837\uff0c\u6ca1\u4ec0\u4e48\u5927\u4e0d\u4e86\u7684\uff0c\u6709\u4e2a\u51e0\u79d2\u5dee\u5f02\u5f88OK\u7684\u3002\u867d\u7136\u8fd9\u7c7b\u5e94\u7528\u5bf9\u4e00\u81f4\u6027\u8981\u6c42\u4e0d\u9ad8\uff0c\u4f46\u5bf9\u6027\u80fd\u8981\u6c42\u5374\u5f88\u9ad8\uff0c\u56e0\u4e3a\u8bfb\u5199\u5b9e\u5728\u592a\u9891\u7e41\u4e86\u3002\u5982\u679c\u4f7f\u7528\u201c\u5173\u7cfb\u578b\u6570\u636e\u5e93\u201d\uff0c\u4e00\u81f4\u6027\u7684\u597d\u5904\u6ca1\u600e\u4e48\u6536\u76ca\uff0c\u53cd\u800c\u6027\u80fd\u95ee\u9898\u6bd4\u8f83\u660e\u663e\uff0c\u6b64\u65f6\uff0c\u4e0d\u4fdd\u8bc1\u4e00\u81f4\u6027\u4f46\u6027\u80fd\u66f4\u4f18\u7684\u201c\u975e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u201d\u5219\u66f4\u5408\u9002\u3002\u540c\u65f6\uff0c\u7531\u4e8e\u201c\u975e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u201d\u7684\u6570\u636e\u7ed3\u6784\u4e0d\u56fa\u5b9a\uff0c\u975e\u5e38\u5bb9\u6613\u6269\u5c55\u3002\u7531\u4e8e\u5bf9\u4e8e\u793e\u4ea4\u7f51\u7ad9\uff0c\u9700\u6c42\u53d8\u52a8\u90a3\u662f\u4e00\u65e5\u4e09\u9910\u5e38\u6709\u7684\u4e8b\uff0c\u6dfb\u52a0\u65b0\u5b57\u6bb5\u5728\u6240\u96be\u514d\uff0c\u201c\u975e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u201d\u8f7b\u677e\u4e0a\u9635\uff0c\u5982\u679c\u4f7f\u7528\u201c\u5173\u7cfb\u578b\u6570\u636e\u5e93\u201d\uff0c\u591a\u534a\u8981\u6570\u636e\u5927\u53d8\u52a8\uff0c\u8981\u597d\u597d\u7422\u78e8\u7422\u78e8\u4e86\u3002<\/p>\n
\u4ece\u6c14\u8d28\u4e0a\u8bb2\uff0c\u201c\u5173\u7cfb\u578b\u6570\u636e\u5e93\u201d\u7a33\u91cd\u6301\u4e45\uff0c\u201c\u975e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u201d\u8fc5\u901f\u7075\u52a8\u3002<\/p>\n
\u5728\u524d\u7aef\u9886\u57df\uff0cWeb SQL Database\u662f\u201c\u5173\u7cfb\u578b\u6570\u636e\u5e93\u201d\uff0cindexedDB\u662f\u201c\u975e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u201d\u3002<\/p>\n
2. \u4e86\u89e3\u6570\u636e\u5e93\u4e2d\u7684\u4e8b\u52a1-transaction<\/h4>\n
\u6570\u636e\u5e93\u7684\u4e8b\u52a1\uff08\u82f1\u6587\u4e3a’transaction’\uff09\uff0c\u6211\u4eec\u53ef\u4ee5\u7406\u89e3\u4e3a\u5bf9\u6570\u636e\u5e93\u7684\u64cd\u4f5c\uff0c\u800c\u4e14\u4e13\u6307\u4e00\u4e2a\u5e8f\u5217\u4e0a\u7684\u64cd\u4f5c\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u94f6\u884c\u8f6c\u8d26\uff0c\u4e00\u4e2a\u8d26\u53f7\u94b1\u5c11\u4e86\u7136\u540e\u53e6\u4e00\u4e2a\u8d26\u53f7\u94b1\u591a\u4e86\uff0c\u8fd9\u4e24\u4e2a\u64cd\u4f5c\u8981\u4e48\u90fd\u6267\u884c\uff0c\u8981\u4e48\u90fd\u4e0d\u6267\u884c\u3002\u50cf\u8fd9\u79cd\u64cd\u4f5c\u5c31\u53ef\u4ee5\u770b\u6210\u4e00\u4e2a\u4e8b\u52a1\u3002<\/p>\n
\u4e8b\u52a1\u7684\u63d0\u51fa\u4e3b\u8981\u662f\u4e3a\u4e86\u4fdd\u8bc1\u5e76\u53d1\u60c5\u51b5\u4e0b\u4fdd\u6301\u6570\u636e\u4e00\u81f4\u6027\u3002\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4e2d\u7684\u4e8b\u52a1\u5177\u6709\u4e0b\u97624\u4e2a\u57fa\u672c\u7279\u5f81\uff1a<\/p>\n
    \n
  1. \u539f\u5b50\u6027(Atomicity)\uff1a\u4e8b\u52a1\u4e2d\u7684\u6240\u6709\u64cd\u4f5c\u4f5c\u4e3a\u4e00\u4e2a\u6574\u4f53\u63d0\u4ea4\u6216\u56de\u6eda\u3002<\/li>\n
  2. \u4e00\u81f4\u6027(Consistemcy)\uff1a\u4e8b\u7269\u5b8c\u6210\u65f6\uff0c\u6570\u636e\u5fc5\u987b\u662f\u4e00\u81f4\u7684\uff0c\u4ee5\u4fdd\u8bc1\u6570\u636e\u7684\u65e0\u635f\u3002<\/li>\n
  3. \u9694\u79bb\u6027(Isolation)\uff1a\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\u7684\u591a\u4e2a\u4e8b\u52a1\u662f\u5f7c\u6b64\u9694\u79bb\u7684\u3002<\/li>\n
  4. \u6301\u4e45\u6027(Durability)\uff1a\u4e8b\u52a1\u5b8c\u6210\u4e4b\u540e\uff0c\u5b83\u5bf9\u4e8e\u7cfb\u7edf\u7684\u5f71\u54cd\u662f\u6c38\u4e45\u7684\uff0c\u8be5\u4fee\u6539\u5373\u4f7f\u51fa\u73b0\u7cfb\u7edf\u6545\u969c\u4e5f\u5c06\u4e00\u76f4\u4fdd\u7559\u3002<\/li>\n<\/ol>\n
    \u901a\u5e38\u4e13\u4e1a\u63cf\u8ff0\u4e2d\u4f1a\u62bd\u53d6\u8fd94\u4e2a\u57fa\u672c\u7279\u6027\u7684\u9996\u5b57\u6bcd\uff0c\u7edf\u79f0\u4e3a\u201cACID\u7279\u6027<\/strong>\u201d\u3002\u4e8b\u52a1\u6267\u884c\u8fc7\u7a0b\u53ef\u4ee5\u7c97\u6d45\u5730\u7406\u89e3\u4e3a\uff1a\u5f00\u59cb\u4e8b\u52a1\uff0c\u5df4\u62c9\u5df4\u62c9\u64cd\u4f5c\uff0c\u5982\u679c\u9519\u8bef\uff0c\u56de\u6eda\uff08rollback\uff09\uff0c\u5982\u679c\u6ca1\u95ee\u9898\uff0c\u63d0\u4ea4\uff08commit\uff09\uff0c\u7ed3\u675f\u4e8b\u52a1\u3002<\/p>\n
    3. \u4e86\u89e3\u6570\u636e\u5e93\u4e2d\u7684\u6e38\u6807-cursor<\/h4>\n
    \u73b0\u5b9e\u4e16\u754c\u4e2d\u7684\u201c\u6e38\u6807\u201d\u76f8\u5173\u8054\u7684\u5e38\u89c1\u4e8b\u7269\u5c31\u662f\u201c\u6e38\u6807\u5361\u5c3a\u201d\uff0c\u6709\u523b\u5ea6\u6709\u533a\u57df\uff1a<\/p>\n
    \"\u6e38\u6807\u5361\u5c3a\"<\/p>\n
    \u6570\u636e\u5e93\u4e2d\u7684\u6e38\u6807\u5176\u5b9e\u4e0e\u4e4b\u6709\u5171\u540c\u4e4b\u5904\u3002\u5185\u5b58\u6761\u672c\u8d28\u4e0a\u5c31\u50cf\u4e00\u628a\u5c3a\u5b50\uff0c\u6211\u4eec\u53ef\u4ee5\u60f3\u8c61\u4e0a\u9762\u6709\u5f88\u591a\u523b\u5ea6\uff0c\u7136\u540e\u5185\u5b58\u5927\u5c0f\u5c31\u662f\u7531\u8fd9\u4e9b\u523b\u5ea6\u4e00\u4e2a\u4e00\u4e2a\u5806\u780c\u8d77\u6765\u7684\u3002\u6570\u636e\u5e93\u7684\u4e8b\u52a1\u4e3a\u4e86\u4fdd\u8bc1\u6570\u636e\u53ef\u4ee5\u56de\u6eda\uff0c\u663e\u7136\u9700\u8981\u6709\u4e00\u7247\u5185\u5b58\u533a\u57df\u653e\u7f6e\u90a3\u4e9b\u5373\u5c06\u53d7\u5f71\u54cd\u662f\u6570\u636e\uff0c\u8fd9\u4e2a\u5185\u5b58\u533a\u57df\u4e2d\u7684\u865a\u8868\u5c31\u662f\u6570\u636e\u5e93\u7684\u201c\u6e38\u6807\u201d\u3002<\/p>\n
    \u548c\u73b0\u5b9e\u4e16\u754c\u7684\u201c\u6e38\u6807\u5361\u5c3a\u201d\u76f8\u6620\u5c04\u5c31\u662f\uff1a\u4e00\u4e2a\u523b\u5ea6\u8868\u793a\u4e00\u884c\u6570\u636e\uff0c\u6e38\u6807\u5c31\u662f\u5c3a\u5b50\u4e0a\u7684\u4e00\u7247\u533a\u57df\uff0c\u60f3\u8981\u83b7\u5f97\u6570\u636e\u5e93\u4e00\u884c\u4e00\u884c\u7684\u6570\u636e\uff0c\u6211\u4eec\u53ef\u4ee5\u904d\u5386\u8fd9\u4e2a\u6e38\u6807\u5c31\u597d\u4e86\u3002<\/p>\n
    4. \u6570\u636e\u5e93\u4e2d\u7684\u201c\u9501\u201d-lock<\/h4>\n
    \u6570\u636e\u5e93\u4e2d\u7684\u201c\u9501\u201d\u662f\u4fdd\u8bc1\u6570\u636e\u5e93\u6570\u636e\u9ad8\u5e76\u53d1\u65f6\u5019\u6570\u636e\u4e00\u81f4\u6027\u7684\u4e00\u79cd\u673a\u5236\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff1a\u73b0\u6709\u4e24\u5904\u706b\u8f66\u7968\u552e\u7968\u70b9\uff0c\u540c\u65f6\u8bfb\u53d6\u67d0\u53d1\u73b0\u4e0a\u6d77\u5230\u5317\u4eac\u8f66\u7968\u4f59\u989d\u4e3a5<\/code>\u3002\u6b64\u65f6\u4e24\u5904\u552e\u7968\u70b9\u540c\u65f6\u5356\u51fa\u4e00\u5f20\u8f66\u7968\uff0c\u540c\u65f6\u4fee\u6539\u4f59\u989d\u4e3a5-1<\/code>\u4e5f\u5c31\u662f4<\/code>\u5199\u56de\u6570\u636e\u5e93\uff0c\u8fd9\u6837\u5c31\u9020\u6210\u4e86\u5b9e\u9645\u5356\u51fa\u4e24\u5f20\u706b\u8f66\u7968\u800c\u6570\u636e\u5e93\u4e2d\u7684\u8bb0\u5f55\u5374\u53ea\u5c11\u4e861<\/code>\u5f20\u3002\u4e3a\u4e86\u907f\u514d\u53d1\u751f\u8fd9\u79cd\u72b6\u51b5\uff0c\u5c31\u6709\u4e86\u9501\u673a\u5236\uff0c\u4e5f\u5c31\u662f\u6267\u884c\u591a\u7ebf\u7a0b\u65f6\u7528\u4e8e\u5f3a\u884c\u9650\u5236\u8d44\u6e90\u8bbf\u95ee\u3002<\/p>\n
    \u4e09\u3001\u4ece\u7b80\u5355\u5b9e\u7528\u7684\u5b9e\u4f8b\u5f00\u59cb\u5b66\u4e60indexedDB<\/h3>\n
    \u8981\u60f3\u7cfb\u7edf\u5b66\u4e60indexedDB\u76f8\u5173\u77e5\u8bc6\uff0c\u53ef\u4ee5\u53bbMDN\u6587\u6863<\/a>\u5543API\uff0c\u5047\u4ee5\u65f6\u65e5\u5c31\u53ef\u4ee5\u6210\u4e3a\u524d\u7aefindexedDB\u65b9\u9762\u7684\u4e13\u5bb6\u3002\u4f46\u662f\u8fd9\u79cd\u5b66\u4e60\u65b9\u6cd5\u5468\u671f\u957f\uff0c\u8fc7\u4e8e\u75db\u82e6\uff0c\u65e0\u6cd5\u7acb\u7aff\u89c1\u5f71\uff0c\u56e0\u4e3aAPI\u5b9e\u5728\u592a\u591a\uff0c\u5929\u5929\u82b1\u4e2a\u628a\u5c0f\u65f6\uff0c\u4f30\u8ba1\u4e5f\u9700\u8981\u6570\u5468\u65f6\u95f4\u624d\u80fd\u5168\u90e8\u901a\u900f\u3002<\/p>\n
    \u4e00\u60f3\u5230\u6295\u5165\u4ea7\u51fa\u6bd4\u8fd9\u4e48\u4f4e\uff0c\u4e8e\u662f\u6211\u51b3\u5b9a\u4ece\u5b9e\u4f8b\u5165\u624b\u5f00\u59cb\u5b66\u4e60\uff0c\u80fd\u591f\u5b9e\u73b0\u57fa\u672c\u7684\u6570\u636e\u5e93\u589e\u5220\u6539\u67e5\u529f\u80fd\u5c31\u597d\uff0c\u57fa\u672c\u4e0a80%+\u7684\u76f8\u5173\u9700\u6c42\u90fd\u80fd\u4ece\u5bb9\u641e\u5b9a\uff1b\u7b49\u65e5\u540e\u6709\u673a\u4f1a\u518d\u6162\u6162\u6df1\u5165\u3002<\/p>\n
    \u82b1\u4e86\u51e0\u4e2a\u665a\u4e0a\u6298\u817e\uff0c\u4e00\u4e2a\u5177\u6709\u589e\u5220\u6539\u65e0\u67e5\u7684\u5b9e\u4f8b\u9875\u9762\u7ec8\u4e8e\u5f04\u51fa\u6765\u4e86\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1aHTMl5 indexedDB\u5b58\u50a8\u7f16\u8f91\u548c\u5220\u9664\u6570\u636edemo<\/a><\/p>\n
    \u6211\u4eec\u7b2c\u4e00\u6b21\u8fdb\u53bb\u662f\u6ca1\u6709\u6570\u636e\u7684\uff0c\u663e\u793a\u5982\u4e0b\uff1a
    \n\"\u6682\u65e0\u6570\u636e\u622a\u56fe\"<\/p>\n
    1. \u6b64\u65f6\uff0c\u6211\u4eec\u586b\u5199\u8868\u5355\uff0c\u521b\u5efa\u4e00\u6761\u6570\u636e\uff0c\u5982\u4e0b\uff1a
    \n\"\u521b\u5efa\u4e00\u6761\u6d4b\u8bd5\u6570\u636e\"<\/p>\n
    \u70b9\u51fb\u201c\u786e\u5b9a\u521b\u5efa\u201d\u6309\u94ae\u540e\uff0c\u5c31\u5f97\u5230\u5982\u4e0b\u56fe\u6240\u793a\u7684\u7ed3\u679c\uff1a
    \n\"\u6dfb\u52a0\u4e00\u6761\u6570\u636e\u540e\u7684\u7ed3\u679c\"<\/p>\n
    \u6b64\u65f6\u6211\u4eec\u5237\u65b0\u9875\u9762\uff0c\u4f9d\u7136\u662f\u4e0a\u56fe\u6240\u793a\u7684\u7ed3\u679c\u3002<\/p>\n
    \u6253\u5f00\u63a7\u5236\u53f0\uff0c\u5728Application\u2192indexedDB\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5f53\u524d\u5b58\u50a8\u7684\u6570\u636e\u5b57\u6bb5\u548c\u503c\u7b49\u4fe1\u606f\uff1a
    \n\"\u5f00\u53d1\u8005\u5de5\u5177\u4e2d\u67e5\u770b\u5b58\u50a8\u6570\u636e\"<\/p>\n
    2. \u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u5bf9\u521b\u5efa\u7684\u6570\u636e\u8fdb\u884c\u4fee\u6539\uff0c\u4f8b\u5982\u4fee\u6539\u5907\u6ce8\u4fe1\u606f\uff1a
    \n\"\u4fee\u6539\u5907\u6ce8\u4fe1\u606f\u622a\u56fe\"<\/p>\n
    \u5931\u7126\u540e\u76f4\u63a5\u5c31\u4fee\u6539\u4e86\u672c\u5730\u6570\u636e\u5e93\u4fe1\u606f\u4e86\uff0c\u6211\u4eec\u5237\u65b0\u4e00\u4e0b\uff0c\u53ef\u4ee5\u770b\u5230\u5907\u6ce8\u6587\u6848\u5df2\u7ecf\u53d8\u6210\u201c\u662f\u4e2a\u5e05\u54e5~\u201d<\/p>\n
    3. \u6211\u4eec\u8fd8\u53ef\u4ee5\u5bf9\u6570\u636e\u5e93\u6570\u636e\u8fdb\u884c\u5220\u9664\uff0c\u4f8b\u5982\u70b9\u51fb\u5220\u9664\u6309\u94ae\uff1a
    \n\"\u70b9\u51fb\u5220\u9664\u6309\u94ae\u793a\u610f\"<\/p>\n
    \u7ed3\u679c\u8fd9\u6761\u6570\u636e\u5e93\u6570\u636e\u5c31\u88ab\u5220\u6389\u4e86\uff0c\u754c\u9762\u91cd\u65b0\u663e\u793a\u4e3a\u201c\u6682\u65e0\u6570\u636e\u201d\u3002<\/p>\n
    \"\u6682\u65e0\u6570\u636e\u622a\u56fe\u793a\u610f\"<\/p>\n
    \u4ee5\u4e0a\u5c31\u662fdemo\u9875\u9762\u6240\u5b9e\u73b0\u7684indexedDB\u7684\u589e\u52a0\u6570\u636e\uff0c\u7f16\u8f91\u6570\u636e\u548c\u5220\u9664\u6570\u636e\u529f\u80fd\u3002<\/p>\n
    \u5982\u679c\u60a8\u5f53\u524d\u7684\u9700\u6c42\u6025\u7528\uff0c\u53ef\u4ee5\u628ademo\u9875\u9762\u4e0a\u7684JS\u6e90\u4ee3\u7801\u76f4\u63a5\u590d\u5236\u8fc7\u53bb\u6539\u6539\uff1b\u5982\u679c\u4f60\u5e0c\u671b\u5bf9indexedDB\u76f8\u5173API\u53ca\u5176\u4f7f\u7528\u6709\u6240\u4e86\u89e3\uff0c\u5c31\u7ee7\u7eed\u5f80\u4e0b\u770b\u3002<\/p>\n
    1. \u9996\u5148\u6253\u5f00indexedDB\u6570\u636e\u5e93<\/h4>\n
    indexedDB\u6570\u636e\u5e93\u6253\u5f00\u975e\u5e38\u7b80\u5355\uff0c\u8bed\u6cd5\u5c31\u662f\u5b57\u9762\u610f\u601d\uff1a<\/p>\n
    window.indexedDB.open(dbName, version);<\/pre>\n
    dbName<\/code>\u5c31\u662f\u6570\u636e\u5e93\u540d\u79f0\uff0c\u4f8b\u5982demo\u4e2d\u4f7f\u7528\u7684\u662f'project'<\/code>\uff1bversion<\/code>\u8868\u793a\u6570\u636e\u5e93\u7684\u7248\u672c\uff0c\u6839\u636e\u6211\u7684\u7406\u89e3\uff0c\u5f53\u6211\u4eec\u5bf9\u6570\u636e\u5e93\u7684\u5b57\u6bb5\u8fdb\u884c\u589e\u52a0\u6216\u4fee\u6539\u65f6\u5019\uff0c\u9700\u8981\u589e\u52a0\u4e2a\u7248\u672c\u3002<\/p>\n
    \u901a\u5e38\uff0c\u6253\u5f00indexedDB\u6570\u636e\u5e93\u662f\u548c\u4e00\u4e9b\u56de\u8c03\u65b9\u6cd5\u4e00\u8d77\u51fa\u73b0\u7684\uff0c\u4ee3\u7801\u5957\u8def\u6bd4\u8f83\u56fa\u5b9a\uff0c\u57fa\u672c\u4e0a\u5982\u679c\u5927\u5bb6\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u4f7f\u7528\u7684\u8bdd\uff0c\u90fd\u53ef\u4ee5\u4f7f\u7528\u7c7b\u4f3c\u7684\u4ee3\u7801\uff1a<\/p>\n
    \n\/\/ \u6570\u636e\u5e93\u6570\u636e\u7ed3\u679c<\/span>\nvar db;\n\/\/ \u6253\u5f00\u6570\u636e\u5e93<\/span>\nvar DBOpenRequest = window.indexedDB.open('project', 1);\n\/\/ \u6570\u636e\u5e93\u6253\u5f00\u6210\u529f\u540e<\/span>\nDBOpenRequest.onsuccess = function(event) {        \n    \/\/ \u5b58\u50a8\u6570\u636e\u7ed3\u679c<\/span>\n    db<\/span> = DBOpenRequest.result;\n    \/\/ \u505a\u5176\u4ed6\u4e8b\u60c5...<\/span>\n};\n\n\/\/ \u4e0b\u9762\u4e8b\u60c5\u6267\u884c\u4e8e\uff1a\u6570\u636e\u5e93\u9996\u6b21\u521b\u5efa\u7248\u672c\uff0c\u6216\u8005window.indexedDB.open\u4f20\u9012\u7684\u65b0\u7248\u672c\uff08\u7248\u672c\u6570\u503c\u8981\u6bd4\u73b0\u5728\u7684\u9ad8\uff09<\/span>\nDBOpenRequest.onupgradeneeded = function(event) {\n    \/\/ \u901a\u5e38\u5bf9\u4e3b\u952e\uff0c\u5b57\u6bb5\u7b49\u8fdb\u884c\u91cd\u5b9a\u4e49\uff0c\u5177\u4f53\u53c2\u89c1demo<\/span>\n};<\/pre>\n
    \u5176\u4e2d\uff0c\u6700\u91cd\u8981\u5c31\u662f\u7ea2\u8272\u9ad8\u4eae\u7684db<\/code>\u53d8\u91cf\uff0c\u6211\u4eec\u540e\u9762\u6240\u6709\u7684\u6570\u636e\u5e93\u64cd\u4f5c\u90fd\u79bb\u4e0d\u5f00\u5b83\u3002<\/p>\n
    2. \u521b\u5efaindexedDB\u6570\u636e\u5e93\u7684\u4e3b\u952e\u548c\u5b57\u6bb5<\/h4>\n
    \u5728\u6211\u4eec\u5f00\u59cb\u6570\u636e\u5e93\u7684\u589e\u52a0\u5220\u9664\u64cd\u4f5c\u4e4b\u524d\uff0c\u9996\u5148\u8981\u628a\u6211\u4eec\u6570\u636e\u5e93\u7684\u4e3b\u952e\u548c\u4e00\u4e9b\u5b57\u6bb5\u5148\u5efa\u597d\u3002\u662f\u5728onupgradeneeded<\/code>\u8fd9\u4e2a\u56de\u8c03\u65b9\u6cd5\u4e2d\u8bbe\u7f6e\u7684\uff0c\u8fd9\u4e2a\u56de\u8c03\u65b9\u6cd5\u6267\u884c\u4e8e\u6570\u636e\u5e93\u9996\u6b21\u521b\u5efa\u7248\u672c\u6216\u8005\u6570\u636e\u5e93indexedDB.open()<\/code>\u65b9\u6cd5\u4e2d\u4f20\u9012\u7684\u7248\u672c\u53f7\u6bd4\u5f53\u524d\u7248\u672c\u53f7\u8981\u9ad8\u3002<\/p>\n
    \u6211\u4eec\u5bf9\u6570\u636e\u5e93\u67d0\u4e00\u884c\u6570\u636e\u8fdb\u884c\u589e\u52a0\u5220\u9664\u64cd\u4f5c\uff0c\u6211\u4eec\u662f\u6ca1\u6709\u5fc5\u8981\u5bf9\u6570\u636e\u5e93\u7684\u7248\u672c\u53f7\u8fdb\u884c\u4fee\u6539\u7684\u3002\u4f46\u662f\u5bf9\u4e8e\u5b57\u6bb5\u4fee\u6539\u5c31\u4e0d\u4e00\u6837\u4e86\uff0c\u6bd4\u65b9\u8bf4\u539f\u6765\u662f5<\/code>\u5217\u6570\u636e\uff0c\u6211\u4eec\u73b0\u5728\u6539\u62106<\/code>\u5217\uff0c\u7531\u4e8e\u76f8\u5173\u8bbe\u7f6e\u662f\u5728onupgradeneeded<\/code>\u56de\u8c03\u4e2d\uff0c\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u589e\u52a0\u7248\u672c\u53f7\u6765\u89e6\u53d1\u5b57\u6bb5\u4fee\u6539\u3002demo\u9875\u9762\u8fd9\u90e8\u5206\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
    DBOpenRequest.onupgradeneeded = function(event) {\n    var db = event.target.result;\n\n    \/\/ \u521b\u5efa\u4e00\u4e2a\u6570\u636e\u5e93\u5b58\u50a8\u5bf9\u8c61<\/span>\n    var objectStore = db.createObjectStore(dbName, { \n        keyPath: 'id',\n        autoIncrement: true\n    });\n\n    \/\/ \u5b9a\u4e49\u5b58\u50a8\u5bf9\u8c61\u7684\u6570\u636e\u9879<\/span>\n    objectStore.createIndex('id', 'id', {\n        unique: true    \n    });\n    objectStore.createIndex('name', 'name');\n    objectStore.createIndex('begin', 'begin');\n    objectStore.createIndex('end', 'end');\n    objectStore.createIndex('person', 'person');\n    objectStore.createIndex('remark', 'remark');\n};<\/pre>\n
    \u8fd9\u91cc\u51fa\u73b0\u4e86\u4e00\u4e2a\u6bd4\u8f83\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u53eb\u505aobjectStore<\/code>\uff0c\u8fd9\u662findexedDB\u53ef\u4ee5\u66ff\u4ee3Web SQL Database\u7684\u91cd\u8981\u4f18\u52bf\u6240\u5728\uff0c\u6211\u79f0\u4e4b\u4e3a\u201c\u5b58\u50a8\u5bf9\u8c61<\/a>\u201d\u3002<\/p>\n
    objectStore.add()<\/code>\u53ef\u4ee5\u5411\u6570\u636e\u5e93\u6dfb\u52a0\u6570\u636e\uff0cobjectStore.delete()<\/code>\u53ef\u4ee5\u5220\u9664\u6570\u636e\uff0cobjectStore.clear()<\/code>\u53ef\u4ee5\u6e05\u7a7a\u6570\u636e\u5e93\uff0cobjectStore.put()<\/code>\u53ef\u4ee5\u66ff\u6362\u6570\u636e\u7b49\u8fd8\u6709\u5f88\u591a\u5f88\u591a\u64cd\u4f5cAPI<\/a>\u3002<\/p>\n
    \u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u4f7f\u7528objectStore<\/code>\u6765\u521b\u5efa\u6570\u636e\u5e93\u7684\u4e3b\u952e\u548c\u666e\u901a\u5b57\u6bb5\u3002<\/p>\n
    db.createObjectStore<\/code>\u5728\u521b\u5efa\u4e3b\u952e\u540c\u65f6\u8fd4\u56de\u201c\u5b58\u50a8\u5bf9\u8c61\u201d\uff0c\u672c\u6f14\u793a\u4e2d\u4f7f\u7528\u81ea\u52a8\u9012\u589e\u7684id<\/code>\u5b57\u6bb5\u4f5c\u4e3a\u5173\u952e\u8def\u5f84\u3002createIndex()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u7528\u6765\u521b\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u521b\u5efa\u5b57\u6bb5\uff0c\u8bed\u6cd5\u4e3a\uff1a<\/p>\n
    objectStore.createIndex(indexName, keyPath, objectParameters)<\/pre>\n
    \u5176\u4e2d\uff1a<\/p>\n
    \n
    indexName<\/dt>\n
    \u521b\u5efa\u7684\u7d22\u5f15\u540d\u79f0\uff0c\u53ef\u4ee5\u4f7f\u7528\u7a7a\u540d\u79f0\u4f5c\u4e3a\u7d22\u5f15\u3002<\/dd>\n
    keyPath<\/dt>\n
    \u7d22\u5f15\u4f7f\u7528\u7684\u5173\u952e\u8def\u5f84\uff0c\u53ef\u4ee5\u4f7f\u7528\u7a7a\u7684keyPath<\/code>, \u6216\u8005keyPath<\/code>\u4f20\u4e3a\u6570\u7ec4keyPath<\/code>\u4e5f\u662f\u53ef\u4ee5\u7684\u3002<\/dd>\n
    objectParameters<\/dt>\n
    \n
    \u53ef\u9009\u53c2\u6570\u3002\u5e38\u7528\u53c2\u6570\u4e4b\u4e00\u662funique<\/code>\uff0c\u8868\u793a\u8be5\u5b57\u6bb5\u503c\u662f\u5426\u552f\u4e00\uff0c\u4e0d\u80fd\u91cd\u590d\u3002\u4f8b\u5982\uff0c\u672cdemo\u4e2did<\/code>\u662f\u4e0d\u80fd\u91cd\u590d\u7684\uff0c\u4e8e\u662f\u6709\u8bbe\u7f6e\uff1a<\/p>\n
    objectStore.createIndex('id', 'id', {\n  unique: true    \n});<\/pre>\n<\/dd>\n<\/dl>\n
    3. indexedDB\u6570\u636e\u5e93\u6dfb\u52a0\u6570\u636e<\/h4>\n
    \u5b57\u6bb5\u5efa\u597d\u4e86\u4e4b\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u7ed9indexedDB\u6570\u636e\u5e93\u6dfb\u52a0\u6570\u636e\u4e86\u3002<\/p>\n
    \u7531\u4e8e\u6570\u636e\u5e93\u7684\u64cd\u4f5c\u90fd\u662f\u57fa\u4e8e\u4e8b\u52a1\uff08transaction\uff09\u6765\u8fdb\u884c\uff0c\u4e8e\u662f\uff0c\u65e0\u8bba\u662f\u6dfb\u52a0\u7f16\u8f91\u8fd8\u662f\u5220\u9664\u6570\u636e\u5e93\uff0c\u6211\u4eec\u90fd\u8981\u5148\u5efa\u7acb\u4e00\u4e2a\u4e8b\u52a1\uff08transaction\uff09\uff0c\u7136\u540e\u624d\u80fd\u7ee7\u7eed\u4e0b\u9762\u7684\u64cd\u4f5c\u3002\u8bed\u6cd5\u5c31\u662f\u540d\u79f0\uff1a<\/p>\n
    var transaction = db.transaction(dbName, \"readwrite\");<\/pre>\n
    dbName<\/code>\u5c31\u662f\u6570\u636e\u5e93\u7684\u540d\u79f0\uff0c\u4e8e\u662f\u6211\u4eec\u7684\u6570\u636e\u5e93\u6dfb\u52a0\u6570\u636e\u64cd\u4f5c\u53d8\u5f97\u5f88\u7b80\u5355\uff1a<\/p>\n
    \/\/ \u65b0\u5efa\u4e00\u4e2a\u4e8b\u52a1<\/span>\nvar transaction = db.transaction('project', \"readwrite\");\n\/\/ \u6253\u5f00\u5b58\u50a8\u5bf9\u8c61<\/span>\nvar objectStore = transaction.objectStore('project');\n\/\/ \u6dfb\u52a0\u5230\u6570\u636e\u5bf9\u8c61\u4e2d<\/span>\nobjectStore.add(newItem);<\/pre>\n
    \u4f7f\u7528\u4e00\u884c\u8bed\u53e5\u8868\u793a\u5c31\u662f\uff1a<\/p>\n
    db.transaction('project', \"readwrite\").objectStore('project').add(newItem);<\/pre>\n
    \u8fd9\u91cc\u7684newItem<\/code>\u76f4\u63a5\u5c31\u662f\u4e00\u4e2a\u539f\u751f\u7684\u7eaf\u7cb9\u7684JavaScript\u5bf9\u8c61\uff0c\u5728\u672cdemo\u4e2d\uff0cnewItem<\/code>\u6570\u636e\u7c7b\u4f3c\u4e0b\u9762\u8fd9\u6837\uff1a<\/p>\n
    {\n  \"name\": \"\u7b2c\u4e00\u4e2a\u9879\u76ee\",\n  \"begin\": \"2017-07-16\",\n  \"end\": \"2057-07-16\",\n  \"person\": \"\u5f20\u946b\u65ed\",\n  \"remark\": \"\u6d4b\u8bd5\u6d4b\u8bd5\"\n}<\/pre>\n
    \u53ef\u4ee5\u53d1\u73b0\uff0c\u5f53\u6211\u4eec\u4f7f\u7528indexedDB\u6570\u636e\u5e93\u6dfb\u52a0\u6570\u636e\u7684\u65f6\u5019\uff0c\u6839\u672c\u5c31\u4e0d\u7528\u53bb\u989d\u5916\u5b66\u4e60SQL\u8bed\u53e5\uff0c\u539f\u59cb\u7684JavaScript\u5bf9\u8c61\u76f4\u63a5\u65e0\u7f1d\u5bf9\u63a5\uff0c\uff0c<\/p>\n
    4. indexedDB\u6570\u636e\u5e93\u7684\u7f16\u8f91<\/h4>\n
    \u539f\u7406\u4e3a\uff0c\u5148\u6839\u636eid<\/code>\u83b7\u5f97\u5bf9\u5e94\u884c\u7684\u5b58\u50a8\u5bf9\u8c61\uff0c\u65b9\u6cd5\u4e3aobjectStore.get(id)<\/code>\uff0c\u7136\u540e\u5728\u539f\u5b58\u50a8\u5bf9\u8c61\u4e0a\u8fdb\u884c\u66ff\u6362\uff0c\u518d\u4f7f\u7528objectStore.put(record)<\/code>\u8fdb\u884c\u6570\u636e\u5e93\u6570\u636e\u66ff\u6362\u3002<\/p>\n
    \u4ee3\u7801\u793a\u610f\uff1a<\/p>\n
    function edit(id, data) {\n    \/\/ \u65b0\u5efa\u4e8b\u52a1<\/span>\n    var transaction = db.transaction('project', \"readwrite\");\n    \/\/ \u6253\u5f00\u5df2\u7ecf\u5b58\u50a8\u7684\u6570\u636e\u5bf9\u8c61<\/span>\n    var objectStore = transaction.objectStore(project);\n    \/\/ \u83b7\u53d6\u5b58\u50a8\u7684\u5bf9\u5e94\u952e\u7684\u5b58\u50a8\u5bf9\u8c61<\/span>\n    var objectStoreRequest = objectStore.get(id);\n    \/\/ \u83b7\u53d6\u6210\u529f\u540e\u66ff\u6362\u5f53\u524d\u6570\u636e<\/span>\n    objectStoreRequest.onsuccess = function(event) {\n        \/\/ \u5f53\u524d\u6570\u636e<\/span>\n        var myRecord = objectStoreRequest.result;\n        \/\/ \u904d\u5386\u66ff\u6362<\/span>\n        for (var key in data) {\n            if (typeof myRecord[key] != 'undefined') {\n                myRecord[key] = data[key];\n            }\n        }\n        \/\/ \u66f4\u65b0\u6570\u636e\u5e93\u5b58\u50a8\u6570\u636e<\/span>             \n        objectStore.put(myRecord);\n    };\n}<\/pre>\n
    \u5176\u4e2d\uff0cid<\/code>\u5c31\u662f\u8981\u66ff\u6362\u7684\u6570\u636e\u5e93\u884c\u7684id<\/code>\u5b57\u6bb5\u503c\uff0c\u56e0\u4e3a\u552f\u4e00\u7684\u4e3b\u952e\uff0c\u53ef\u4ee5\u4fdd\u8bc1\u51c6\u786e\u548c\u9ad8\u6027\u80fd\uff1bdata<\/code>\u5219\u662f\u9700\u8981\u66ff\u6362\u7684\u6570\u636e\u5bf9\u8c61\uff0c\u4f8b\u5982\u4ece\u201c\u6d4b\u8bd5\u6d4b\u8bd5\u201d\u4fee\u6539\u4e3a\u201c\u662f\u4e2a\u5e05\u54e5~\u201d\uff0c\u5219\u8c03\u7528\uff1a<\/p>\n
    edit(1, {\n  remark: '\u662f\u4e2a\u5e05\u54e5~'\n});<\/pre>\n
    \u5c31\u53ef\u4ee5\u4e86\uff0c\u8ddf\u6211\u4eec\u5e73\u5e38\u5199JS\u4ee3\u7801\u5c31\u6ca1\u6709\u4ec0\u4e48\u533a\u522b\u3002<\/p>\n
    5. indexedDB\u6570\u636e\u5e93\u7684\u5220\u9664<\/h4>\n
    \u548c\u6dfb\u52a0\u64cd\u4f5c\u6b63\u597d\u76f8\u53cd\uff0c\u4f46\u4ee3\u7801\u7ed3\u6784\u5374\u662f\u7c7b\u4f3c\u7684\uff0c\u4e00\u884c\u8868\u793a\u6cd5\uff1a<\/p>\n
    db.transaction('project', \"readwrite\").objectStore('project').delete(id);<\/pre>\n
    id<\/code>\u8868\u793a\u9700\u8981\u5220\u9664\u884cid<\/code>\u5b57\u6bb5\u5bf9\u5e94\u7684\u503c\u3002<\/p>\n
    5. indexedDB\u6570\u636e\u5e93\u7684\u83b7\u53d6<\/h4>\n
    indexedDB\u6570\u636e\u5e93\u7684\u83b7\u53d6\u4f7f\u7528Cursor APIs<\/a>\u548cKey Range APIs<\/a>\u3002<\/p>\n
    \u4e5f\u5c31\u662f\u4f7f\u7528\u201c\u6e38\u6807API\u201d\u548c\u201c\u8303\u56f4API\u201d\u3002\u5728\u672c\u6587\u7684\u6f14\u793a\u9875\u9762\u4e2d\uff0c\u53ea\u4f7f\u7528\u4e86\u201c\u6e38\u6807API\u201d\uff0c\u76f4\u63a5\u663e\u793a\u5168\u90e8\u6570\u636e\uff0c\u5bf9\u4e8e\u201c\u8303\u56f4API\u201d\u5e76\u6ca1\u6709\u4f7f\u7528\uff0c\u4f46\u8fd9\u91cc\u4e5f\u4f1a\u7b80\u5355\u4ecb\u7ecd\u4e0b\u3002<\/p>\n
    \u201c\u6e38\u6807API\u201d\u53ef\u4ee5\u8ba9\u6211\u4eec\u4e00\u884c\u4e00\u884c\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\uff0c\u4ee3\u7801\u793a\u610f\uff1a<\/p>\n
    var objectStore = db.transaction(dbName).objectStore(dbName);\nobjectStore.openCursor().onsuccess = function(event) {\n    var cursor = event.target.result;\n    if (cursor) {\n        \/\/ cursor.value\u5c31\u662f\u6570\u636e\u5bf9\u8c61\n        \/\/ \u6e38\u6807\u6ca1\u6709\u904d\u5386\u5b8c\uff0c\u7ee7\u7eed<\/span>\n        cursor.continue();\n    } else {\n        \/\/ \u5982\u679c\u5168\u90e8\u904d\u5386\u5b8c\u6bd5...<\/span>\n    }\n}<\/pre>\n
    \u53ef\u4ee5\u770b\u5230\uff0c\u6211\u4eec\u4f7f\u7528\u5b58\u50a8\u5bf9\u8c61\u7684openCursor()<\/code>\u6253\u5f00\u6e38\u6807\uff0c\u5728onsuccess<\/code>\u56de\u8c03\u4e2d\u5c31\u53ef\u4ee5\u904d\u5386\u6211\u4eec\u7684\u6e38\u6807\u5bf9\u8c61\u4e86\u3002\u5176\u4e2dcursor.value<\/code>\u5c31\u662f\u5b8c\u6574\u7684\u6570\u636e\u5bf9\u8c61\uff0c\u7eafJS\u5bf9\u8c61\uff0c\u5c31\u50cf\u4e0b\u9762\u8fd9\u6837\uff1a<\/p>\n
    {\n  \"id\": 1,\n  \"name\": \"\u7b2c\u4e00\u4e2a\u9879\u76ee\",\n  \"begin\": \"2017-07-16\",\n  \"end\": \"2057-07-16\",\n  \"person\": \"\u5f20\u946b\u65ed\",\n  \"remark\": \"\u6d4b\u8bd5\u6d4b\u8bd5\"\n}<\/pre>\n
    \u6211\u4eec\u5c31\u53ef\u4ee5\u6309\u7167\u9700\u6c42\u968f\u610f\u663e\u793a\u6211\u4eec\u7684\u6570\u636e\u4e86\u3002<\/p>\n
    \u201c\u8303\u56f4API\u201d\u662f\u548c\u201c\u6e38\u6807API\u201d\u4e00\u8d77\u4f7f\u7528\u7684\uff0c\u770b\u4e0b\u9762\u8fd9\u4e2a\u4f8b\u5b50\uff0c\u53ea\u6253\u5f00id<\/code>\u4ece4~10\u4e4b\u95f4\u7684\u6570\u636e\uff0c\u5219\u6709\uff1a<\/p>\n
    \/\/ \u786e\u5b9a\u6253\u5f00\u7684\u6e38\u6807\u7684\u4e3b\u952e\u8303\u56f4<\/span>\nvar keyRangeValue = IDBKeyRange.bound(4, 10);\n\/\/ \u6253\u5f00\u5bf9\u5e94\u8303\u56f4\u7684\u6e38\u6807<\/span>\nvar objectStore = db.transaction(dbName).objectStore(dbName);\nobjectStore.openCursor(keyRangeValue).onsuccess = function(event) {\n    var cursor = event.target.result;\n    \/\/ ...<\/span>\n}<\/pre>\n
    \u5176\u4e2d\uff0c\u6709bound()<\/code>, only()<\/code>, lowerBound()\u548cupperBound()<\/code>\u8fd9\u51e0\u4e2a\u65b9\u6cd5\uff0c\u610f\u601d\u5c31\u662f\u65b9\u6cd5\u540d\u5b57\u9762\u610f\u601d\uff0c\u201c\u8303\u56f4\u5185\u201d\uff0c\u201c\u4ec5\u4ec5\u662f\u201d\uff0c\u201c\u5c0f\u4e8e\u67d0\u503c\u201d\u548c\u201c\u5927\u4e8e\u67d0\u503c\u201d\u3002<\/p>\n
    \u65b9\u6cd5\u6700\u540e\u8fd8\u652f\u6301\u4e24\u4e2a\u5e03\u5c14\u503c\u53c2\u6570\uff0c\u4f8b\u5982\uff1a<\/p>\n
    IDBKeyRange.bound(4, 10, true, true)<\/pre>\n
    \u5219\u8868\u793a\u8303\u56f43~9<\/code>\uff0c\u4e5f\u5c31\u662f\u4e3atrue<\/code>\u7684\u65f6\u5019\u4e0d\u80fd\u548c\u8303\u56f4\u8fb9\u754c\u76f8\u7b49\u3002<\/p>\n
    \u56db\u3001indexedDB\u5b58\u50a8\u548clocalStorage\u5b58\u50a8\u5bf9\u6bd4<\/h3>\n