HTML Audio/Video DOM progress Event

Alert that the video is downloading:

let vid = document.getElementById("myVideo");
vid.onprogress = function() {
alert("Downloading video");
};

More "Try it Yourself" examples below.

Definition and Usage

The progress event occurs when the browser is downloading the specified audio/video.

During the loading process of an audio/video, the following events occur, in this order:

The numbers in the table specify the first browser version that fully supports the event.

Event
progress	Yes	9.0	Yes	Yes	Yes

In HTML:

<audio|video onprogress="myScript">Try it

In JavaScript:

audio|video.onprogress=function(){myScript};Try it

In JavaScript, using the addEventListener() method:

audio|video.addEventListener("progress", myScript);Try it

Supported HTML tags:	<audio> and <video>
Supported JavaScript objects:	Audio, Video

Alert that the audio is downloading:

let aud = document.getElementById("myAudio");
aud.onprogress = function() {
alert("Downloading audio");
};