The MediaRecorder.onstartevent handler (part of the MediaRecorder API) handles the start event, allowing you to run code in response to media recording being started by a MediaRecorder.
The start event is thrown as a result of the MediaRecorder.start() method being invoked. At this point, the data starts being gathered into a Blob.
MediaRecorder.onstart = function(event) { ... }
MediaRecorder.addEventListener('start', function(event) { ... }) ...
record.onclick = function() {
mediaRecorder.start();
console.log("recorder started");
}
mediaRecorder.onstart = function() {
// do something in response to
// recording being started
}
... None.
| Specification | Status | Comment |
|---|---|---|
| MediaStream Recording The definition of 'MediaRecorder.onstart' in that specification. | Working Draft | Initial definition |
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 47[2] | 25.0 (25.0) | No support | No support | No support |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|---|
| Basic support | No support | No support | 25.0 (25.0) | 1.3[1] | No support | No support | No support | No support |
[1] The intial Firefox OS implementation only supported audio recording.
[2] To try this feature on Chrome, enable Experimental Web Platform features from chrome://flags . Currently only video is supported, not audio.
Navigator.getUserMedia
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https://developer.mozilla.org/en-US/docs/Web/API/MediaRecorder/onstart