This API is available on Firefox OS for internal applications only.

The remove() method of the DataStore interface deletes one or more objects from the current data store.

Note: The Data Store API is available in Web Workers, from Firefox 32 onwards (Firefox OS 2.0; see bug 949325.)


store.remove(1).then(function(success) {
  // Do something with success, which is a boolean communicating 
  // the result of whether the deletion was successful or not


A Promise object of type Boolean that resolves with a boolean communicating the result of whether the deletion was successful or not.


remove() can be passed one or more ids of specific records that you want to delete from the data store. When you want to delete multiple ids, you pass them in as multiple parameters, rather than an array or object, e.g. remove(1,2,3).
You can specify an optional second parameter that will be a revisionId (a DOMString). This can be used to prevent conflicts. If the revisionId is not the current revisionId for the current Data Store, the operation is aborted. This means that the developer has a 'old' revisionId and will have to manage the conflict somehow.


The following example gets all the data stores on the device called "contacts", then removes the first three records stored in the first "contacts" data store:

navigator.getDataStores('contacts').then(function(stores) {
  stores[0].remove(1,2,3).then(function(success) {
    if(success) {
      console.log('Records successfully removed.');


Specification Status Comment
Data Store API
The definition of 'remove()' in that specification.

The discussion concerning this API's creation happened in various Mozilla mailing lists and other places. A summary of the discussion and further pointers can be found on the Mozilla Wiki. For further feedback and questions, send mail to the dev-webapi mailing list.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support No support No support No support No support No support
Feature Android Chrome Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
Basic support No support No support No support 1.0.1 No support No support No support
Available in web workers No support No support No support 2.0 No support No support No support

See also

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, fscholz
 Last updated by: chrisdavidmills,