{"id":2922,"date":"2018-07-08T15:43:47","date_gmt":"2018-07-08T07:43:47","guid":{"rendered":"http:\/\/www.xttblog.com\/?p=2922"},"modified":"2018-07-08T15:43:47","modified_gmt":"2018-07-08T07:43:47","slug":"%e6%b5%8f%e8%a7%88%e5%99%a8%e6%95%b0%e6%8d%ae%e5%ba%93-indexeddb-%e5%85%a5%e9%97%a8%e6%95%99%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=2922","title":{"rendered":"\u6d4f\u89c8\u5668\u6570\u636e\u5e93 IndexedDB \u5165\u95e8\u6559\u7a0b"},"content":{"rendered":"<h2>\n\t\u4e00\u3001\u6982\u8ff0<br \/>\n<\/h2>\n<p>\n\t\u968f\u7740\u6d4f\u89c8\u5668\u7684\u529f\u80fd\u4e0d\u65ad\u589e\u5f3a\uff0c\u8d8a\u6765\u8d8a\u591a\u7684\u7f51\u7ad9\u5f00\u59cb\u8003\u8651\uff0c\u5c06\u5927\u91cf\u6570\u636e\u50a8\u5b58\u5728\u5ba2\u6237\u7aef\uff0c\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u6570\u636e\uff0c\u76f4\u63a5\u4ece\u672c\u5730\u83b7\u53d6\u6570\u636e\u3002\n<\/p>\n<p>\n\t\u73b0\u6709\u7684\u6d4f\u89c8\u5668\u6570\u636e\u50a8\u5b58\u65b9\u6848\uff0c\u90fd\u4e0d\u9002\u5408\u50a8\u5b58\u5927\u91cf\u6570\u636e\uff1aCookie \u7684\u5927\u5c0f\u4e0d\u8d85\u8fc74KB\uff0c\u4e14\u6bcf\u6b21\u8bf7\u6c42\u90fd\u4f1a\u53d1\u9001\u56de\u670d\u52a1\u5668\uff1bLocalStorage \u5728 2.5MB \u5230 10MB \u4e4b\u95f4\uff08\u5404\u5bb6\u6d4f\u89c8\u5668\u4e0d\u540c\uff09\uff0c\u800c\u4e14\u4e0d\u63d0\u4f9b\u641c\u7d22\u529f\u80fd\uff0c\u4e0d\u80fd\u5efa\u7acb\u81ea\u5b9a\u4e49\u7684\u7d22\u5f15\u3002\u6240\u4ee5\uff0c\u9700\u8981\u4e00\u79cd\u65b0\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u8fd9\u5c31\u662f IndexedDB \u8bde\u751f\u7684\u80cc\u666f\u3002\n<\/p>\n<p>\n\t<img decoding=\"async\" alt=\"\" src=\"https:\/\/www.wangbase.com\/blogimg\/asset\/201807\/bg2018070401.png\" title=\"\" \/>\n<\/p>\n<p>\n\t\u901a\u4fd7\u5730\u8bf4\uff0cIndexedDB \u5c31\u662f\u6d4f\u89c8\u5668\u63d0\u4f9b\u7684\u672c\u5730\u6570\u636e\u5e93\uff0c\u5b83\u53ef\u4ee5\u88ab\u7f51\u9875\u811a\u672c\u521b\u5efa\u548c\u64cd\u4f5c\u3002IndexedDB \u5141\u8bb8\u50a8\u5b58\u5927\u91cf\u6570\u636e\uff0c\u63d0\u4f9b\u67e5\u627e\u63a5\u53e3\uff0c\u8fd8\u80fd\u5efa\u7acb\u7d22\u5f15\u3002\u8fd9\u4e9b\u90fd\u662f LocalStorage \u6240\u4e0d\u5177\u5907\u7684\u3002\u5c31\u6570\u636e\u5e93\u7c7b\u578b\u800c\u8a00\uff0cIndexedDB \u4e0d\u5c5e\u4e8e\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff08\u4e0d\u652f\u6301 SQL \u67e5\u8be2\u8bed\u53e5\uff09\uff0c\u66f4\u63a5\u8fd1 NoSQL \u6570\u636e\u5e93\u3002\n<\/p>\n<p>\n\tIndexedDB \u5177\u6709\u4ee5\u4e0b\u7279\u70b9\u3002\n<\/p>\n<p>\n\t<strong>\uff081\uff09\u952e\u503c\u5bf9\u50a8\u5b58\u3002<\/strong>&nbsp;IndexedDB \u5185\u90e8\u91c7\u7528\u5bf9\u8c61\u4ed3\u5e93\uff08object store\uff09\u5b58\u653e\u6570\u636e\u3002\u6240\u6709\u7c7b\u578b\u7684\u6570\u636e\u90fd\u53ef\u4ee5\u76f4\u63a5\u5b58\u5165\uff0c\u5305\u62ec JavaScript \u5bf9\u8c61\u3002\u5bf9\u8c61\u4ed3\u5e93\u4e2d\uff0c\u6570\u636e\u4ee5&quot;\u952e\u503c\u5bf9&quot;\u7684\u5f62\u5f0f\u4fdd\u5b58\uff0c\u6bcf\u4e00\u4e2a\u6570\u636e\u8bb0\u5f55\u90fd\u6709\u5bf9\u5e94\u7684\u4e3b\u952e\uff0c\u4e3b\u952e\u662f\u72ec\u4e00\u65e0\u4e8c\u7684\uff0c\u4e0d\u80fd\u6709\u91cd\u590d\uff0c\u5426\u5219\u4f1a\u629b\u51fa\u4e00\u4e2a\u9519\u8bef\u3002\n<\/p>\n<p>\n\t<strong>\uff082\uff09\u5f02\u6b65\u3002<\/strong>&nbsp;IndexedDB \u64cd\u4f5c\u65f6\u4e0d\u4f1a\u9501\u6b7b\u6d4f\u89c8\u5668\uff0c\u7528\u6237\u4f9d\u7136\u53ef\u4ee5\u8fdb\u884c\u5176\u4ed6\u64cd\u4f5c\uff0c\u8fd9\u4e0e LocalStorage \u5f62\u6210\u5bf9\u6bd4\uff0c\u540e\u8005\u7684\u64cd\u4f5c\u662f\u540c\u6b65\u7684\u3002\u5f02\u6b65\u8bbe\u8ba1\u662f\u4e3a\u4e86\u9632\u6b62\u5927\u91cf\u6570\u636e\u7684\u8bfb\u5199\uff0c\u62d6\u6162\u7f51\u9875\u7684\u8868\u73b0\u3002\n<\/p>\n<p>\n\t<strong>\uff083\uff09\u652f\u6301\u4e8b\u52a1\u3002<\/strong>&nbsp;IndexedDB \u652f\u6301\u4e8b\u52a1\uff08transaction\uff09\uff0c\u8fd9\u610f\u5473\u7740\u4e00\u7cfb\u5217\u64cd\u4f5c\u6b65\u9aa4\u4e4b\u4e2d\uff0c\u53ea\u8981\u6709\u4e00\u6b65\u5931\u8d25\uff0c\u6574\u4e2a\u4e8b\u52a1\u5c31\u90fd\u53d6\u6d88\uff0c\u6570\u636e\u5e93\u56de\u6eda\u5230\u4e8b\u52a1\u53d1\u751f\u4e4b\u524d\u7684\u72b6\u6001\uff0c\u4e0d\u5b58\u5728\u53ea\u6539\u5199\u4e00\u90e8\u5206\u6570\u636e\u7684\u60c5\u51b5\u3002\n<\/p>\n<p>\n\t<strong>\uff084\uff09\u540c\u6e90\u9650\u5236<\/strong>&nbsp;IndexedDB \u53d7\u5230\u540c\u6e90\u9650\u5236\uff0c\u6bcf\u4e00\u4e2a\u6570\u636e\u5e93\u5bf9\u5e94\u521b\u5efa\u5b83\u7684\u57df\u540d\u3002\u7f51\u9875\u53ea\u80fd\u8bbf\u95ee\u81ea\u8eab\u57df\u540d\u4e0b\u7684\u6570\u636e\u5e93\uff0c\u800c\u4e0d\u80fd\u8bbf\u95ee\u8de8\u57df\u7684\u6570\u636e\u5e93\u3002\n<\/p>\n<p>\n\t<strong>\uff085\uff09\u50a8\u5b58\u7a7a\u95f4\u5927<\/strong>&nbsp;IndexedDB \u7684\u50a8\u5b58\u7a7a\u95f4\u6bd4 LocalStorage \u5927\u5f97\u591a\uff0c\u4e00\u822c\u6765\u8bf4\u4e0d\u5c11\u4e8e 250MB\uff0c\u751a\u81f3\u6ca1\u6709\u4e0a\u9650\u3002\n<\/p>\n<p>\n\t<strong>\uff086\uff09\u652f\u6301\u4e8c\u8fdb\u5236\u50a8\u5b58\u3002<\/strong>&nbsp;IndexedDB \u4e0d\u4ec5\u53ef\u4ee5\u50a8\u5b58\u5b57\u7b26\u4e32\uff0c\u8fd8\u53ef\u4ee5\u50a8\u5b58\u4e8c\u8fdb\u5236\u6570\u636e\uff08ArrayBuffer \u5bf9\u8c61\u548c Blob \u5bf9\u8c61\uff09\u3002\n<\/p>\n<h2>\n\t\u4e8c\u3001\u57fa\u672c\u6982\u5ff5<br \/>\n<\/h2>\n<p>\n\tIndexedDB \u662f\u4e00\u4e2a\u6bd4\u8f83\u590d\u6742\u7684 API\uff0c\u6d89\u53ca\u4e0d\u5c11\u6982\u5ff5\u3002\u5b83\u628a\u4e0d\u540c\u7684\u5b9e\u4f53\uff0c\u62bd\u8c61\u6210\u4e00\u4e2a\u4e2a\u5bf9\u8c61\u63a5\u53e3\u3002\u5b66\u4e60\u8fd9\u4e2a API\uff0c\u5c31\u662f\u5b66\u4e60\u5b83\u7684\u5404\u79cd\u5bf9\u8c61\u63a5\u53e3\u3002\n<\/p>\n<blockquote>\n<ul>\n<li>\n\t\t\t\u6570\u636e\u5e93\uff1aIDBDatabase \u5bf9\u8c61\n\t\t<\/li>\n<li>\n\t\t\t\u5bf9\u8c61\u4ed3\u5e93\uff1aIDBObjectStore \u5bf9\u8c61\n\t\t<\/li>\n<li>\n\t\t\t\u7d22\u5f15\uff1a IDBIndex \u5bf9\u8c61\n\t\t<\/li>\n<li>\n\t\t\t\u4e8b\u52a1\uff1a IDBTransaction \u5bf9\u8c61\n\t\t<\/li>\n<li>\n\t\t\t\u64cd\u4f5c\u8bf7\u6c42\uff1aIDBRequest \u5bf9\u8c61\n\t\t<\/li>\n<li>\n\t\t\t\u6307\u9488\uff1a IDBCursor \u5bf9\u8c61\n\t\t<\/li>\n<li>\n\t\t\t\u4e3b\u952e\u96c6\u5408\uff1aIDBKeyRange \u5bf9\u8c61\n\t\t<\/li>\n<\/ul>\n<\/blockquote>\n<p>\n\t\u4e0b\u9762\u662f\u4e00\u4e9b\u4e3b\u8981\u7684\u6982\u5ff5\u3002\n<\/p>\n<p>\n\t<strong>\uff081\uff09\u6570\u636e\u5e93<\/strong>\n<\/p>\n<p>\n\t\u6570\u636e\u5e93\u662f\u4e00\u7cfb\u5217\u76f8\u5173\u6570\u636e\u7684\u5bb9\u5668\u3002\u6bcf\u4e2a\u57df\u540d\uff08\u4e25\u683c\u7684\u8bf4\uff0c\u662f\u534f\u8bae + \u57df\u540d + \u7aef\u53e3\uff09\u90fd\u53ef\u4ee5\u65b0\u5efa\u4efb\u610f\u591a\u4e2a\u6570\u636e\u5e93\u3002\n<\/p>\n<p>\n\tIndexedDB \u6570\u636e\u5e93\u6709\u7248\u672c\u7684\u6982\u5ff5\u3002\u540c\u4e00\u4e2a\u65f6\u523b\uff0c\u53ea\u80fd\u6709\u4e00\u4e2a\u7248\u672c\u7684\u6570\u636e\u5e93\u5b58\u5728\u3002\u5982\u679c\u8981\u4fee\u6539\u6570\u636e\u5e93\u7ed3\u6784\uff08\u65b0\u589e\u6216\u5220\u9664\u8868\u3001\u7d22\u5f15\u6216\u8005\u4e3b\u952e\uff09\uff0c\u53ea\u80fd\u901a\u8fc7\u5347\u7ea7\u6570\u636e\u5e93\u7248\u672c\u5b8c\u6210\u3002\n<\/p>\n<p>\n\t<strong>\uff082\uff09\u5bf9\u8c61\u4ed3\u5e93<\/strong>\n<\/p>\n<p>\n\t\u6bcf\u4e2a\u6570\u636e\u5e93\u5305\u542b\u82e5\u5e72\u4e2a\u5bf9\u8c61\u4ed3\u5e93\uff08object store\uff09\u3002\u5b83\u7c7b\u4f3c\u4e8e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u8868\u683c\u3002\n<\/p>\n<p>\n\t<strong>\uff083\uff09\u6570\u636e\u8bb0\u5f55<\/strong>\n<\/p>\n<p>\n\t\u5bf9\u8c61\u4ed3\u5e93\u4fdd\u5b58\u7684\u662f\u6570\u636e\u8bb0\u5f55\u3002\u6bcf\u6761\u8bb0\u5f55\u7c7b\u4f3c\u4e8e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u884c\uff0c\u4f46\u662f\u53ea\u6709\u4e3b\u952e\u548c\u6570\u636e\u4f53\u4e24\u90e8\u5206\u3002\u4e3b\u952e\u7528\u6765\u5efa\u7acb\u9ed8\u8ba4\u7684\u7d22\u5f15\uff0c\u5fc5\u987b\u662f\u4e0d\u540c\u7684\uff0c\u5426\u5219\u4f1a\u62a5\u9519\u3002\u4e3b\u952e\u53ef\u4ee5\u662f\u6570\u636e\u8bb0\u5f55\u91cc\u9762\u7684\u4e00\u4e2a\u5c5e\u6027\uff0c\u4e5f\u53ef\u4ee5\u6307\u5b9a\u4e3a\u4e00\u4e2a\u9012\u589e\u7684\u6574\u6570\u7f16\u53f7\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\n{ id: 1, text: &#039;foo&#039; }\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u4e0a\u9762\u7684\u5bf9\u8c61\u4e2d\uff0c<code>id<\/code>\u5c5e\u6027\u53ef\u4ee5\u5f53\u4f5c\u4e3b\u952e\u3002\n<\/p>\n<p>\n\t\u6570\u636e\u4f53\u53ef\u4ee5\u662f\u4efb\u610f\u6570\u636e\u7c7b\u578b\uff0c\u4e0d\u9650\u4e8e\u5bf9\u8c61\u3002\n<\/p>\n<p>\n\t<strong>\uff084\uff09\u7d22\u5f15<\/strong>\n<\/p>\n<p>\n\t\u4e3a\u4e86\u52a0\u901f\u6570\u636e\u7684\u68c0\u7d22\uff0c\u53ef\u4ee5\u5728\u5bf9\u8c61\u4ed3\u5e93\u91cc\u9762\uff0c\u4e3a\u4e0d\u540c\u7684\u5c5e\u6027\u5efa\u7acb\u7d22\u5f15\u3002\n<\/p>\n<p>\n\t<strong>\uff085\uff09\u4e8b\u52a1<\/strong>\n<\/p>\n<p>\n\t\u6570\u636e\u8bb0\u5f55\u7684\u8bfb\u5199\u548c\u5220\u6539\uff0c\u90fd\u8981\u901a\u8fc7\u4e8b\u52a1\u5b8c\u6210\u3002\u4e8b\u52a1\u5bf9\u8c61\u63d0\u4f9b<code>error<\/code>\u3001<code>abort<\/code>\u548c<code>complete<\/code>\u4e09\u4e2a\u4e8b\u4ef6\uff0c\u7528\u6765\u76d1\u542c\u64cd\u4f5c\u7ed3\u679c\u3002\n<\/p>\n<h2>\n\t\u4e09\u3001\u64cd\u4f5c\u6d41\u7a0b<br \/>\n<\/h2>\n<p>\n\tIndexedDB \u6570\u636e\u5e93\u7684\u5404\u79cd\u64cd\u4f5c\uff0c\u4e00\u822c\u662f\u6309\u7167\u4e0b\u9762\u7684\u6d41\u7a0b\u8fdb\u884c\u7684\u3002\u8fd9\u4e2a\u90e8\u5206\u53ea\u7ed9\u51fa\u7b80\u5355\u7684\u4ee3\u7801\u793a\u4f8b\uff0c\u7528\u4e8e\u5feb\u901f\u4e0a\u624b\uff0c\u8be6\u7ec6\u7684\u5404\u4e2a\u5bf9\u8c61\u7684 API \u8bf7\u770b<a href=\"https:\/\/wangdoc.com\/javascript\/bom\/indexeddb.html#indexeddb-%E5%AF%B9%E8%B1%A1\" target=\"_blank\">\u8fd9\u91cc<\/a>\u3002\n<\/p>\n<h3>\n\t3.1 \u6253\u5f00\u6570\u636e\u5e93<br \/>\n<\/h3>\n<p>\n\t\u4f7f\u7528 IndexedDB \u7684\u7b2c\u4e00\u6b65\u662f\u6253\u5f00\u6570\u636e\u5e93\uff0c\u4f7f\u7528<code>indexedDB.open()<\/code>\u65b9\u6cd5\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nvar request = window.indexedDB.open(databaseName, version);\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u8fd9\u4e2a\u65b9\u6cd5\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570\uff0c\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u5b57\u7b26\u4e32\uff0c\u8868\u793a\u6570\u636e\u5e93\u7684\u540d\u5b57\u3002\u5982\u679c\u6307\u5b9a\u7684\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5c31\u4f1a\u65b0\u5efa\u6570\u636e\u5e93\u3002\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u6574\u6570\uff0c\u8868\u793a\u6570\u636e\u5e93\u7684\u7248\u672c\u3002\u5982\u679c\u7701\u7565\uff0c\u6253\u5f00\u5df2\u6709\u6570\u636e\u5e93\u65f6\uff0c\u9ed8\u8ba4\u4e3a\u5f53\u524d\u7248\u672c\uff1b\u65b0\u5efa\u6570\u636e\u5e93\u65f6\uff0c\u9ed8\u8ba4\u4e3a<code>1<\/code>\u3002\n<\/p>\n<p>\n\t<code>indexedDB.open()<\/code>\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a IDBRequest \u5bf9\u8c61\u3002\u8fd9\u4e2a\u5bf9\u8c61\u901a\u8fc7\u4e09\u79cd\u4e8b\u4ef6<code>error<\/code>\u3001<code>success<\/code>\u3001<code>upgradeneeded<\/code>\uff0c\u5904\u7406\u6253\u5f00\u6570\u636e\u5e93\u7684\u64cd\u4f5c\u7ed3\u679c\u3002\n<\/p>\n<p>\n\t<strong>\uff081\uff09error \u4e8b\u4ef6<\/strong>\n<\/p>\n<p>\n\t<code>error<\/code>\u4e8b\u4ef6\u8868\u793a\u6253\u5f00\u6570\u636e\u5e93\u5931\u8d25\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nrequest.onerror = function (event) {\r\n  console.log(&#039;\u6570\u636e\u5e93\u6253\u5f00\u62a5\u9519&#039;);\r\n};\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t<strong>\uff082\uff09success \u4e8b\u4ef6<\/strong>\n<\/p>\n<p>\n\t<code>success<\/code>\u4e8b\u4ef6\u8868\u793a\u6210\u529f\u6253\u5f00\u6570\u636e\u5e93\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nvar db;\r\n\r\nrequest.onsuccess = function (event) {\r\n  db = request.result;\r\n  console.log(&#039;\u6570\u636e\u5e93\u6253\u5f00\u6210\u529f&#039;);\r\n};\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u8fd9\u65f6\uff0c\u901a\u8fc7<code>request<\/code>\u5bf9\u8c61\u7684<code>result<\/code>\u5c5e\u6027\u62ff\u5230\u6570\u636e\u5e93\u5bf9\u8c61\u3002\n<\/p>\n<p>\n\t<strong>\uff083\uff09upgradeneeded \u4e8b\u4ef6<\/strong>\n<\/p>\n<p>\n\t\u5982\u679c\u6307\u5b9a\u7684\u7248\u672c\u53f7\uff0c\u5927\u4e8e\u6570\u636e\u5e93\u7684\u5b9e\u9645\u7248\u672c\u53f7\uff0c\u5c31\u4f1a\u53d1\u751f\u6570\u636e\u5e93\u5347\u7ea7\u4e8b\u4ef6<code>upgradeneeded<\/code>\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nvar db;\r\n\r\nrequest.onupgradeneeded = function (event) {\r\n  db = event.target.result;\r\n}\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u8fd9\u65f6\u901a\u8fc7\u4e8b\u4ef6\u5bf9\u8c61\u7684<code>target.result<\/code>\u5c5e\u6027\uff0c\u62ff\u5230\u6570\u636e\u5e93\u5b9e\u4f8b\u3002\n<\/p>\n<h3>\n\t3.2 \u65b0\u5efa\u6570\u636e\u5e93<br \/>\n<\/h3>\n<p>\n\t\u65b0\u5efa\u6570\u636e\u5e93\u4e0e\u6253\u5f00\u6570\u636e\u5e93\u662f\u540c\u4e00\u4e2a\u64cd\u4f5c\u3002\u5982\u679c\u6307\u5b9a\u7684\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5c31\u4f1a\u65b0\u5efa\u3002\u4e0d\u540c\u4e4b\u5904\u5728\u4e8e\uff0c\u540e\u7eed\u7684\u64cd\u4f5c\u4e3b\u8981\u5728<code>upgradeneeded<\/code>\u4e8b\u4ef6\u7684\u76d1\u542c\u51fd\u6570\u91cc\u9762\u5b8c\u6210\uff0c\u56e0\u4e3a\u8fd9\u65f6\u7248\u672c\u4ece\u65e0\u5230\u6709\uff0c\u6240\u4ee5\u4f1a\u89e6\u53d1\u8fd9\u4e2a\u4e8b\u4ef6\u3002\n<\/p>\n<p>\n\t\u901a\u5e38\uff0c\u65b0\u5efa\u6570\u636e\u5e93\u4ee5\u540e\uff0c\u7b2c\u4e00\u4ef6\u4e8b\u662f\u65b0\u5efa\u5bf9\u8c61\u4ed3\u5e93\uff08\u5373\u65b0\u5efa\u8868\uff09\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nrequest.onupgradeneeded = function(event) {\r\n  db = event.target.result;\r\n  var objectStore = db.createObjectStore(&#039;person&#039;, { keyPath: &#039;id&#039; });\r\n}\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0c\u6570\u636e\u5e93\u65b0\u5efa\u6210\u529f\u4ee5\u540e\uff0c\u65b0\u589e\u4e00\u5f20\u53eb\u505a<code>person<\/code>\u7684\u8868\u683c\uff0c\u4e3b\u952e\u662f<code>id<\/code>\u3002\n<\/p>\n<p>\n\t\u66f4\u597d\u7684\u5199\u6cd5\u662f\u5148\u5224\u65ad\u4e00\u4e0b\uff0c\u8fd9\u5f20\u8868\u683c\u662f\u5426\u5b58\u5728\uff0c\u5982\u679c\u4e0d\u5b58\u5728\u518d\u65b0\u5efa\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nrequest.onupgradeneeded = function (event) {\r\n  db = event.target.result;\r\n  var objectStore;\r\n  if (!db.objectStoreNames.contains(&#039;person&#039;)) {\r\n    objectStore = db.createObjectStore(&#039;person&#039;, { keyPath: &#039;id&#039; });\r\n  }\r\n}\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u4e3b\u952e\uff08key\uff09\u662f\u9ed8\u8ba4\u5efa\u7acb\u7d22\u5f15\u7684\u5c5e\u6027\u3002\u6bd4\u5982\uff0c\u6570\u636e\u8bb0\u5f55\u662f<code>{ id: 1, name: &#039;\u5f20\u4e09&#039; }<\/code>\uff0c\u90a3\u4e48<code>id<\/code>\u5c5e\u6027\u53ef\u4ee5\u4f5c\u4e3a\u4e3b\u952e\u3002\u4e3b\u952e\u4e5f\u53ef\u4ee5\u6307\u5b9a\u4e3a\u4e0b\u4e00\u5c42\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u6bd4\u5982<code>{ foo: { bar: &#039;baz&#039; } }<\/code>\u7684<code>foo.bar<\/code>\u4e5f\u53ef\u4ee5\u6307\u5b9a\u4e3a\u4e3b\u952e\u3002\n<\/p>\n<p>\n\t\u5982\u679c\u6570\u636e\u8bb0\u5f55\u91cc\u9762\u6ca1\u6709\u5408\u9002\u4f5c\u4e3a\u4e3b\u952e\u7684\u5c5e\u6027\uff0c\u90a3\u4e48\u53ef\u4ee5\u8ba9 IndexedDB \u81ea\u52a8\u751f\u6210\u4e3b\u952e\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nvar objectStore = db.createObjectStore(\r\n  &#039;person&#039;,\r\n  { autoIncrement: true }\r\n);\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0c\u6307\u5b9a\u4e3b\u952e\u4e3a\u4e00\u4e2a\u9012\u589e\u7684\u6574\u6570\u3002\n<\/p>\n<p>\n\t\u65b0\u5efa\u5bf9\u8c61\u4ed3\u5e93\u4ee5\u540e\uff0c\u4e0b\u4e00\u6b65\u53ef\u4ee5\u65b0\u5efa\u7d22\u5f15\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nrequest.onupgradeneeded = function(event) {\r\n  db = event.target.result;\r\n  var objectStore = db.createObjectStore(&#039;person&#039;, { keyPath: &#039;id&#039; });\r\n  objectStore.createIndex(&#039;name&#039;, &#039;name&#039;, { unique: false });\r\n  objectStore.createIndex(&#039;email&#039;, &#039;email&#039;, { unique: true });\r\n}\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0c<code>IDBObject.createIndex()<\/code>\u7684\u4e09\u4e2a\u53c2\u6570\u5206\u522b\u4e3a\u7d22\u5f15\u540d\u79f0\u3001\u7d22\u5f15\u6240\u5728\u7684\u5c5e\u6027\u3001\u914d\u7f6e\u5bf9\u8c61\uff08\u8bf4\u660e\u8be5\u5c5e\u6027\u662f\u5426\u5305\u542b\u91cd\u590d\u7684\u503c\uff09\u3002\n<\/p>\n<h3>\n\t3.3 \u65b0\u589e\u6570\u636e<br \/>\n<\/h3>\n<p>\n\t\u65b0\u589e\u6570\u636e\u6307\u7684\u662f\u5411\u5bf9\u8c61\u4ed3\u5e93\u5199\u5165\u6570\u636e\u8bb0\u5f55\u3002\u8fd9\u9700\u8981\u901a\u8fc7\u4e8b\u52a1\u5b8c\u6210\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nfunction add() {\r\n  var request = db.transaction(['person'], &#039;readwrite&#039;)\r\n    .objectStore(&#039;person&#039;)\r\n    .add({ id: 1, name: &#039;\u5f20\u4e09&#039;, age: 24, email: &#039;<a href=\"mailto:zhangsan@example.com\">zhangsan@example.com<\/a>&#039; });\r\n\r\n  request.onsuccess = function (event) {\r\n    console.log(&#039;\u6570\u636e\u5199\u5165\u6210\u529f&#039;);\r\n  };\r\n\r\n  request.onerror = function (event) {\r\n    console.log(&#039;\u6570\u636e\u5199\u5165\u5931\u8d25&#039;);\r\n  }\r\n}\r\n\r\nadd();\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0c\u5199\u5165\u6570\u636e\u9700\u8981\u65b0\u5efa\u4e00\u4e2a\u4e8b\u52a1\u3002\u65b0\u5efa\u65f6\u5fc5\u987b\u6307\u5b9a\u8868\u683c\u540d\u79f0\u548c\u64cd\u4f5c\u6a21\u5f0f\uff08&quot;\u53ea\u8bfb&quot;\u6216&quot;\u8bfb\u5199&quot;\uff09\u3002\u65b0\u5efa\u4e8b\u52a1\u4ee5\u540e\uff0c\u901a\u8fc7<code>IDBTransaction.objectStore(name)<\/code>\u65b9\u6cd5\uff0c\u62ff\u5230 IDBObjectStore \u5bf9\u8c61\uff0c\u518d\u901a\u8fc7\u8868\u683c\u5bf9\u8c61\u7684<code>add()<\/code>\u65b9\u6cd5\uff0c\u5411\u8868\u683c\u5199\u5165\u4e00\u6761\u8bb0\u5f55\u3002\n<\/p>\n<p>\n\t\u5199\u5165\u64cd\u4f5c\u662f\u4e00\u4e2a\u5f02\u6b65\u64cd\u4f5c\uff0c\u901a\u8fc7\u76d1\u542c\u8fde\u63a5\u5bf9\u8c61\u7684<code>success<\/code>\u4e8b\u4ef6\u548c<code>error<\/code>\u4e8b\u4ef6\uff0c\u4e86\u89e3\u662f\u5426\u5199\u5165\u6210\u529f\u3002\n<\/p>\n<h3>\n\t3.4 \u8bfb\u53d6\u6570\u636e<br \/>\n<\/h3>\n<p>\n\t\u8bfb\u53d6\u6570\u636e\u4e5f\u662f\u901a\u8fc7\u4e8b\u52a1\u5b8c\u6210\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nfunction read() {\r\n   var transaction = db.transaction(['person']);\r\n   var objectStore = transaction.objectStore(&#039;person&#039;);\r\n   var request = objectStore.get(1);\r\n\r\n   request.onerror = function(event) {\r\n     console.log(&#039;\u4e8b\u52a1\u5931\u8d25&#039;);\r\n   };\r\n\r\n   request.onsuccess = function( event) {\r\n      if (request.result) {\r\n        console.log(&#039;Name: &#039; + request.result.name);\r\n        console.log(&#039;Age: &#039; + request.result.age);\r\n        console.log(&#039;Email: &#039; + request.result.email);\r\n      } else {\r\n        console.log(&#039;\u672a\u83b7\u5f97\u6570\u636e\u8bb0\u5f55&#039;);\r\n      }\r\n   };\r\n}\r\n\r\nread();\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0c<code>objectStore.get()<\/code>\u65b9\u6cd5\u7528\u4e8e\u8bfb\u53d6\u6570\u636e\uff0c\u53c2\u6570\u662f\u4e3b\u952e\u7684\u503c\u3002\n<\/p>\n<h3>\n\t3.5 \u904d\u5386\u6570\u636e<br \/>\n<\/h3>\n<p>\n\t\u904d\u5386\u6570\u636e\u8868\u683c\u7684\u6240\u6709\u8bb0\u5f55\uff0c\u8981\u4f7f\u7528\u6307\u9488\u5bf9\u8c61 IDBCursor\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nfunction readAll() {\r\n  var objectStore = db.transaction(&#039;person&#039;).objectStore(&#039;person&#039;);\r\n\r\n   objectStore.openCursor().onsuccess = function (event) {\r\n     var cursor = event.target.result;\r\n\r\n     if (cursor) {\r\n       console.log(&#039;Id: &#039; + cursor.key);\r\n       console.log(&#039;Name: &#039; + cursor.value.name);\r\n       console.log(&#039;Age: &#039; + cursor.value.age);\r\n       console.log(&#039;Email: &#039; + cursor.value.email);\r\n       cursor.continue();\r\n    } else {\r\n      console.log(&#039;\u6ca1\u6709\u66f4\u591a\u6570\u636e\u4e86\uff01&#039;);\r\n    }\r\n  };\r\n}\r\n\r\nreadAll();\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0c\u65b0\u5efa\u6307\u9488\u5bf9\u8c61\u7684<code>openCursor()<\/code>\u65b9\u6cd5\u662f\u4e00\u4e2a\u5f02\u6b65\u64cd\u4f5c\uff0c\u6240\u4ee5\u8981\u76d1\u542c<code>success<\/code>\u4e8b\u4ef6\u3002\n<\/p>\n<h3>\n\t3.6 \u66f4\u65b0\u6570\u636e<br \/>\n<\/h3>\n<p>\n\t\u66f4\u65b0\u6570\u636e\u8981\u4f7f\u7528<code>IDBObject.put()<\/code>\u65b9\u6cd5\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nfunction update() {\r\n  var request = db.transaction(['person'], &#039;readwrite&#039;)\r\n    .objectStore(&#039;person&#039;)\r\n    .put({ id: 1, name: &#039;\u674e\u56db&#039;, age: 35, email: &#039;<a href=\"mailto:lisi@example.com\">lisi@example.com<\/a>&#039; });\r\n\r\n  request.onsuccess = function (event) {\r\n    console.log(&#039;\u6570\u636e\u66f4\u65b0\u6210\u529f&#039;);\r\n  };\r\n\r\n  request.onerror = function (event) {\r\n    console.log(&#039;\u6570\u636e\u66f4\u65b0\u5931\u8d25&#039;);\r\n  }\r\n}\r\n\r\nupdate();\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0c<code>put()<\/code>\u65b9\u6cd5\u81ea\u52a8\u66f4\u65b0\u4e86\u4e3b\u952e\u4e3a<code>1<\/code>\u7684\u8bb0\u5f55\u3002\n<\/p>\n<h3>\n\t3.7 \u5220\u9664\u6570\u636e<br \/>\n<\/h3>\n<p>\n\t<code>IDBObjectStore.delete()<\/code>\u65b9\u6cd5\u7528\u4e8e\u5220\u9664\u8bb0\u5f55\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nfunction remove() {\r\n  var request = db.transaction(['person'], &#039;readwrite&#039;)\r\n    .objectStore(&#039;person&#039;)\r\n    .delete(1);\r\n\r\n  request.onsuccess = function (event) {\r\n    console.log(&#039;\u6570\u636e\u5220\u9664\u6210\u529f&#039;);\r\n  };\r\n}\r\n\r\nremove();\r\n<\/code><\/pre>\n<\/blockquote>\n<h3>\n\t3.8 \u4f7f\u7528\u7d22\u5f15<br \/>\n<\/h3>\n<p>\n\t\u7d22\u5f15\u7684\u610f\u4e49\u5728\u4e8e\uff0c\u53ef\u4ee5\u8ba9\u4f60\u641c\u7d22\u4efb\u610f\u5b57\u6bb5\uff0c\u4e5f\u5c31\u662f\u8bf4\u4ece\u4efb\u610f\u5b57\u6bb5\u62ff\u5230\u6570\u636e\u8bb0\u5f55\u3002\u5982\u679c\u4e0d\u5efa\u7acb\u7d22\u5f15\uff0c\u9ed8\u8ba4\u53ea\u80fd\u641c\u7d22\u4e3b\u952e\uff08\u5373\u4ece\u4e3b\u952e\u53d6\u503c\uff09\u3002\n<\/p>\n<p>\n\t\u5047\u5b9a\u65b0\u5efa\u8868\u683c\u7684\u65f6\u5019\uff0c\u5bf9<code>name<\/code>\u5b57\u6bb5\u5efa\u7acb\u4e86\u7d22\u5f15\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nobjectStore.createIndex(&#039;name&#039;, &#039;name&#039;, { unique: false });\r\n<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u73b0\u5728\uff0c\u5c31\u53ef\u4ee5\u4ece<code>name<\/code>\u627e\u5230\u5bf9\u5e94\u7684\u6570\u636e\u8bb0\u5f55\u4e86\u3002\n<\/p>\n<blockquote>\n<pre>\r\n<code>\r\nvar transaction = db.transaction(['person'], &#039;readonly&#039;);\r\nvar store = transaction.objectStore(&#039;person&#039;);\r\nvar index = store.index(&#039;name&#039;);\r\nvar request = index.get(&#039;\u674e\u56db&#039;);\r\n\r\nrequest.onsuccess = function (e) {\r\n  var result = e.target.result;\r\n  if (result) {\r\n    \/\/ ...\r\n  } else {\r\n    \/\/ ...\r\n  }\r\n}<\/code><\/pre>\n<\/blockquote>\n<p>\n\t\u539f\u6587\uff1a<a href=\"http:\/\/www.ruanyifeng.com\/blog\/2018\/07\/indexeddb.html\" name=\"IndexedDB \u5165\u95e8\u6559\u7a0b\" target=\"_blank\" title=\"IndexedDB \u5165\u95e8\u6559\u7a0b\">http:\/\/www.ruanyifeng.com\/blog\/2018\/07\/indexeddb.html<\/a>\u3002<\/p>\n<!-- <audio autoplay=\"autoplay\" height=\"100\" width=\"100\" hidden=\"true\"><source src=\"https:\/\/c.coka.la\/orAvPR.mp3\" type=\"audio\/mp3\"\/><\/audio><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/ws3.sinaimg.cn\/large\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/> --><p><!-- <img decoding=\"async\" src=\"https:\/\/raw.githubusercontent.com\/xmt1139057136\/xttblog\/master\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/>--><img decoding=\"async\" src=\"https:\/\/saas.51autoparts.cn\/api\/admin\/sys-file\/oss\/file?fileName=84db51f8561e448f9a4fda2eff0811f9.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/><\/p><p>\u6700\u540e\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u4e2a\u4eba\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a\u4e1a\u4f59\u8349\uff08yyucao\uff09\uff01<b>\u53ef\u52a0\u4f5c\u8005\u5fae\u4fe1\u53f7\uff1a<font color=\"red\">xttblog2<\/font>\u3002\u5907\u6ce8\uff1a\u201c1\u201d\uff0c\u6dfb\u52a0\u535a\u4e3b\u5fae\u4fe1\u62c9\u4f60\u8fdb\u5fae\u4fe1\u7fa4\u3002\u5907\u6ce8\u9519\u8bef\u4e0d\u4f1a\u540c\u610f\u597d\u53cb\u7533\u8bf7\u3002<\/b>\u518d\u6b21\u611f\u8c22\u60a8\u7684\u5173\u6ce8\uff01\u540e\u7eed\u6709\u7cbe\u5f69\u5185\u5bb9\u4f1a\u7b2c\u4e00\u65f6\u95f4\u53d1\u7ed9\u60a8\uff01\u539f\u521b\u6587\u7ae0\u6295\u7a3f\u8bf7\u53d1\u9001\u81f3532009913@qq.com\u90ae\u7bb1\u3002\u5546\u52a1\u5408\u4f5c\u4e5f\u53ef\u6dfb\u52a0\u4f5c\u8005\u5fae\u4fe1\u8fdb\u884c\u8054\u7cfb\uff01<\/p><p>\u672c\u6587\u539f\u6587\u51fa\u5904\uff1a<a href=\"https:\/\/www.xttblog.com\">\u4e1a\u4f59\u8349<\/a>\uff1a &raquo; <a href=\"https:\/\/www.xttblog.com\/?p=2922\">\u6d4f\u89c8\u5668\u6570\u636e\u5e93 IndexedDB \u5165\u95e8\u6559\u7a0b<\/a><\/p><!-- <div class=\"bd-reward-stl\"><button id=\"bdRewardBtn\"><span><\/span><\/button><\/div> -->","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u6982\u8ff0 \u968f\u7740\u6d4f\u89c8\u5668\u7684\u529f\u80fd\u4e0d\u65ad\u589e\u5f3a\uff0c\u8d8a\u6765\u8d8a\u591a\u7684\u7f51\u7ad9\u5f00\u59cb\u8003\u8651\uff0c\u5c06\u5927\u91cf\u6570\u636e\u50a8\u5b58\u5728\u5ba2\u6237\u7aef\uff0c\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u6570 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,6],"tags":[1579,1304,1306,1305,737],"class_list":["post-2922","post","type-post","status-publish","format-standard","hentry","category-html5","category-yyzt","tag-berkeleydb","tag-indexeddb","tag-webkitindexeddb","tag-web","tag-737"],"_links":{"self":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/2922","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2922"}],"version-history":[{"count":1,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/2922\/revisions"}],"predecessor-version":[{"id":2923,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/2922\/revisions\/2923"}],"wp:attachment":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2922"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2922"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}