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    DeviceStorage.usedSpace()

    This article is in need of a technical review.

    Non-standard
    This feature is not on a current W3C standards track, but it is supported on the Firefox OS platform. Although implementations may change in the future and it is not supported widely across browsers, it is suitable for use in code dedicated to Firefox OS apps.

    This API is available on Firefox OS for privileged or certified applications only.

    Summary

    The usedSpace method is used to get the total of space used by the storage (the amount of space filled by files).

    The request's result is a number representing the amount of available space expressed in Bytes.

    Syntax

    var instanceOfDOMRequest = instanceOfDeviceStorage.usedSpace();

    Returns

    It returns a DOMRequest object to handle the success or error of the operation.

    Example

    var sdcard = navigator.getDeviceStorage("sdcard");
    
    var request = sdcard.usedSpace();
    
    request.onsuccess = function () {
      // The result is expressed in bytes, let's turn it into Gigabytes
      var size = this.result / Math.pow(10,9);
    
      console.log("The files on your SDCard take " + size.toFixed(2) + "GB of space.");
    }
    
    request.onerror = function () {
      console.warn("Unable to get the space used by the SDCard: " + this.error);
    }
    

    Specification

    Not part of any specification.

    See also

    Document Tags and Contributors

    Contributors to this page: kscarfone, fscholz, Jeremie
    Last updated by: fscholz,