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// This works on all devices/browsers, and uses IndexedDBShim as a final fallback | |
var indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB || window.shimIndexedDB; | |
// Open (or create) the database | |
var open = indexedDB.open("MyDatabase", 1); | |
// Create the schema | |
open.onupgradeneeded = function() { | |
var db = open.result; | |
var store = db.createObjectStore("MyObjectStore", {keyPath: "id"}); | |
var index = store.createIndex("NameIndex", ["name.last", "name.first"]); | |
}; | |
open.onsuccess = function() { | |
// Start a new transaction | |
var db = open.result; | |
var tx = db.transaction("MyObjectStore", "readwrite"); | |
var store = tx.objectStore("MyObjectStore"); | |
var index = store.index("NameIndex"); | |
// Add some data | |
store.put({id: 12345, name: {first: "John", last: "Doe"}, age: 42}); | |
store.put({id: 67890, name: {first: "Bob", last: "Smith"}, age: 35}); | |
// Query the data | |
var getJohn = store.get(12345); | |
var getBob = index.get(["Smith", "Bob"]); | |
getJohn.onsuccess = function() { | |
console.log(getJohn.result.name.first); // => "John" | |
}; | |
getBob.onsuccess = function() { | |
console.log(getBob.result.name.first); // => "Bob" | |
}; | |
// Close the db when the transaction is done | |
tx.oncomplete = function() { | |
db.close(); | |
}; | |
} |
Thank you!! :D
Thanks✌️
Amazing! Thnx! :D
Thank you very much
Awesome :)
I have a comment, which is more of a question. You execute four operations against the store (two writes and two reads). The database is closed when the transaction is completed. From what I there is a high risk that the database will be closed before one of the operations is actually completed. Am I right or am I missing something?
I have a comment, which is more of a question. You execute four operations against the store (two writes and two reads). The database is closed when the transaction is completed. From what I there is a high risk that the database will be closed before one of the operations is actually completed. Am I right or am I missing something?
This one could answer your question:
https://stackoverflow.com/questions/34915581/indexeddb-when-to-close-a-connection
hi I have a small challenge. can you please explain how to apply this to a situation where you are fetching data from an API? I mean the "add some data" part.