The ProgressEvent()
constructor returns a new ProgressEvent
object, representing the current completion of a long process.
The ProgressEvent()
constructor returns a new ProgressEvent
object, representing the current completion of a long process.
js
new ProgressEvent(type) new ProgressEvent(type, options)
type
A string with the name of the event. It is case-sensitive and browsers set it to loadstart
, progress
, abort
, error
, load
, timeout
, or loadend
.
options
Optional
An object that, in addition of the properties defined in Event()
, can have the following properties:
lengthComputable
Optional
A boolean value 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. It defaults to false
.
loaded
Optional
A number 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. It defaults to 0
.
total
Optional
A number 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. It defaults to 0
.
A new ProgressEvent
object.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
ProgressEvent |
16 | 14 | 18 | No | ≤12.1 | 6 | 4.4 | 18 | 18 | ≤12.1 | 6 | 1.0 |
ProgressEvent
interface it belongs to.
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https://developer.mozilla.org/en-US/docs/Web/API/ProgressEvent/ProgressEvent