Web/API/ProgressEvent/initProgressEvent

DeprecatedThis feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

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.

The ProgressEvent.initProgressEvent() method Initializes an animation event created using the deprecated Document.createEvent("ProgressEvent") method.

ProgressEvent created that way are untrusted.

Note: this method has been dropped during the standard process. It has been deprecated and removed from most implementation. Do not use it anymore, use the standard constructor, ProgressEvent(), to create a synthetic ProgressEvent

Syntax

Progress.initProgressEvent(typeArg, canBubbleArg, cancelableArg, lengthComputable, loaded, total);

Parameters

typeArg

Is a DOMString identifying the specific type of animation event that occurred. The following values are allowed:

Value	Meaning
`loadstart`	The operation has started.
`progress`	The operation still is in progress.
`error`	The operation failed and didn't complete.
`abort`	The operation was cancelled and didn't complete.
`load`	The operation completed.
`loadend`	The operation stopped.

canBubbleArg

Is a Boolean flag indicating if the event can bubble (true) or not (false).

cancelableArg

Is a Boolean flag indicating if the event associated action can be avoided (true) or not (false).

lengthComputable

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.

loaded

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.

total

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.

Specifications

This feature does not exist in any specifications.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`initProgressEvent` Deprecated'Non-standard'	Chrome No support 1 — 17	Edge No support 12 — 79	Firefox No support 3.5 — 22	IE Full support 10	Opera No support ? — 15	Safari No support ? — ?	WebView Android No support No	Chrome Android No support ? — ?	Firefox Android No support 4 — 22	Opera Android No support ? — 14	Safari iOS No support ? — ?	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support
Non-standard. Expect poor cross-browser support.': Non-standard. Expect poor cross-browser support.
Deprecated. Not for use in new websites.': Deprecated. Not for use in new websites.