Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
Experimental
This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The IDBLocaleAwareKeyRange
interface of the IndexedDB API is a Firefox-specific version of IDBKeyRange
— it functions in exactly the same fashion, and has the same properties and methods, but it is intended for use with IDBIndex
objects when the original index had a locale
value specified upon its creation (see createIndex()
's optionalParameters) — that is, it has locale aware sorting enabled.
Methods
This interface inherits all the methods of its parent interface, IDBKeyRange
.
Properties
This interface inherits all the properties of its parent interface, IDBKeyRange
.
Bear in mind however that IDBLocaleAwareKeyRange
has its own implementation of IDBKeyRange.bound
. This is because when you use bound()
, it checks if lower bound < upper bound, and throws an exception if that’s not the case. With locale-aware indexes, the meaning of < depends on the locale, so for example in Lithuanian Y is sorted between I and K. The only difference between IDBKeyRange
and IDBLocaleAwareKeyRange
is that the latter doesn’t do the aforementioned check.
Developers should always use IDBLocaleAwareKeyRange
when dealing with locale-aware indexes.
Examples
function displayData() {
var keyRangeValue = IDBLocaleAwareKeyRange.bound("A", "F");
var transaction = db.transaction(['fThings'], 'readonly');
var objectStore = transaction.objectStore('fThings');
var myIndex = objectStore.index('lName');
myIndex.openCursor(keyRangeValue).onsuccess = function(event) {
var cursor = event.target.result;
if(cursor) {
var tableRow = document.createElement('tr');
tableRow.innerHTML = '<td>' + cursor.value.id + '</td>'
+ '<td>' + cursor.value.lName + '</td>'
+ '<td>' + cursor.value.fName + '</td>'
+ '<td>' + cursor.value.jTitle + '</td>'
+ '<td>' + cursor.value.company + '</td>'
+ '<td>' + cursor.value.eMail + '</td>'
+ '<td>' + cursor.value.phone + '</td>'
+ '<td>' + cursor.value.age + '</td>';
tableEntry.appendChild(tableRow);
cursor.continue();
} else {
console.log('Entries all displayed.');
}
};
};
Specifications
Not currently part of any specification.
Browser compatibility
BCD tables only load in the browser
See also
- Using IndexedDB
- Starting transactions:
IDBDatabase
- Using transactions:
IDBTransaction
- Setting a range of keys:
IDBKeyRange
- Retrieving and making changes to your data:
IDBObjectStore
- Using cursors:
IDBCursor
- Reference example: To-do Notifications (view example live.)