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.
FileRequest.onprogress
Summary
This property specifies a callback function to be run repeatedly while the operation represented by a FileRequest
object is in progress.
Each time the function callback is called, it gets an object as its first parameter. Those objects contain two properties:
-
loaded
-
A number representing the current amount of bytes processed by the operation.
-
total
-
A number representing the total amount of bytes that will be processed by the operation.
Value
A Function
object.
Examples
// Assuming 'request' which is a FileRequest object request.onprogress = function (status) { var progress = document.querySelector('progress'); progress.value = status.loaded; progress.max = status.total; }
Specifications
Not part of any current specification.
See also
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https://developer.mozilla.org/en-US/docs/Web/API/FileRequest/onprogress