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    ProgressEvent

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    The ProgressEvent interface represents events measuring progress of an underlying process, like an HTTP request (for an XMLHttpRequest, or the loading of the underlying resource of an <img>, <audio>, <video>, <style> or <link>).

    Properties

    Also inherits properties from its parent Event.

    ProgressEvent.lengthComputable Read only
    Is a Boolean flag indicating if the total work to be done, and the amount of work already done, by the underlying process is calculable. In other words, it tells if the progress is measurable or not.
    ProgressEvent.loaded Read only
    Is an unsigned long long representing the amount of work already performed by the underlying process. The ratio of work done can be calculated with the property and ProgressEvent.total. When downloading a resource using HTTP, this only represent the part of the content itself, not headers and other overhead.
    ProgressEvent.total Read only
    Is an unsigned long long representing the total amount of work that the underlying process is in the progress of performing. When downloading a resource using HTTP, this only represent the content itself, not headers and other overhead.

    Constructor

    ProgressEvent()
    Creates a ProgressEvent event with the given parameters.

    Methods

    Also inherits methods from its parent Event.

    ProgressEvent.initProgressEvent()
    Initializes a ProgressEvent created using the deprecated Document.createEvent("ProgressEvent") method.

    Specifications

    Specification Status Comment
    Progress Events
    The definition of 'ProgressEvent' in that specification.
    Candidate Recommendation Initial definition.

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support 1.0 3.5 (1.9.1) 10.0 (Yes) (Yes)
    initProgressEvent() 1.0
    Removed in 17.0
    3.5 (1.9.1)
    Removed in 22 (22)
    10.0 Removed in 15.0 Not supported (Removed at some point.
    Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support (Yes) 1.0 (1.9.1) 10.0 (Yes) (Yes)
    initProgressEvent() Not supported (Removed at some point) 1.0 (1.9.1)
    Removed in 22.0 (22)
    10.0 Removed in 15.0 Not supported (Removed at some point.

    See also

    • The Event base interface.

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    Contributors to this page: fscholz, teoli
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