The MediaKeySession.load() method returns a Promise that resolves to a boolean value after loading data for a specified session object. 
 The MediaKeySession.load() method returns a Promise that resolves to a boolean value after loading data for a specified session object. 
js
load(sessionId)
sessionIdA unique string generated by the content description module for the current media object and its associated keys or licenses.
 A Promise that resolves to a boolean indicating whether the load succeeded or failed. 
| Specification | 
|---|
| Encrypted Media Extensions  # dom-mediakeysession-load  | 
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
load | 
42 | 13 | 38 | No | 29 | 12.1 | 43 | 42 | 38 | 29 | 12.2 | 4.0 | 
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    https://developer.mozilla.org/en-US/docs/Web/API/MediaKeySession/load