Module $_.indexedDB
Defined in: indexedDB.js.
string | dbname | |
int?, Default: | version | |
function?, Default: | onupgradeneeded |
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Defined in: indexedDB.js.
string | dbname | |
int?, Default: | version | |
function?, Default: | onupgradeneeded |
1 /** - 2 * Module for simplifying Indexed DB access - 3 */ - 4 (function (){ - 5 "use strict"; - 6 - 7 var db = window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB || window.msIndexedDB, - 8 indexedDB = {}; - 9 - 10 //Well, some browsers don't support it yet - 11 if(typeof db === "undefined") - 12 { - 13 return; - 14 } - 15 - 16 /** - 17 * Module for simplifying Indexed DB access - 18 * - 19 * @namespace - 20 * @name indexedDB - 21 * @memberOf $_ - 22 */ - 23 indexedDB = { - 24 current_db: null, - 25 /** - 26 * Connects to an indexedDB database - 27 * - 28 * @memberOf $_.indexedDB - 29 * @name connect - 30 * @function - 31 * @param string dbname - 32 * @param [int] version - 33 * @param [function] onupgradeneeded - 34 */ - 35 connect: function(dbname, version, onupgradeneeded) - 36 { - 37 var request = {}; - 38 - 39 version = version || 1; - 40 - 41 // Ask for permission to use db - 42 request = db.open(dbname, version); - 43 - 44 // Assign onupgradeneeded callback - 45 if(typeof onupgradeneeded !== "undefined") - 46 { - 47 request.onupgradeneeded = onupgradeneeded; - 48 } - 49 - 50 /** - 51 * @private - 52 */ - 53 request.onerror = function(event) - 54 { - 55 console.log("IndexedDB disallowed."); - 56 }; - 57 - 58 /** - 59 * @private - 60 */ - 61 request.onsuccess = function(event) - 62 { - 63 // Connect to the specified db - 64 indexedDB.current_db = request.result; - 65 }; - 66 }, - 67 /** - 68 * Helper function to create a new object store - 69 * - 70 * @memberOf $_.indexedDB - 71 * @name create_store - 72 * @function - 73 * @param string name - 74 * @param [string] key - 75 * @param [bool] generator - 76 * @return IDBDataStore object - 77 */ - 78 create_store: function(name, key, generator) - 79 { - 80 var params = {}; - 81 - 82 if(typeof key !== "undefined") - 83 { - 84 params.keyPath = key; - 85 } - 86 - 87 if(typeof generator !== "undefined") - 88 { - 89 // Cast to a boolean value - 90 params.autoIncrement = !! generator; - 91 } - 92 - 93 return db.createObjectStore(name, params); - 94 }, - 95 /** - 96 * Delete an object store - 97 * - 98 * @memberOf $_.indexedDB - 99 * @name delete_store -100 * @function -101 * @param string name -102 */ -103 delete_store: function(name) -104 { -105 var request = db.deleteObjectStore(); -106 -107 // Pass the error up -108 request.onerror = db.onerror; -109 } -110 -111 }; -112 -113 $_.ext('indexedDB', indexedDB); -114 -115 }());\ No newline at end of file