223733 2021-03-25 00:45:22 -0700 Play h5 audio element in wkwebview will report error: Required client entitlement is missing 2021-03-27 02:54:01 -0700 1 1 1 Unclassified WebKit Media WebKit Nightly Build iPhone / iPad iOS 14 NEW HTML5, InRadar P2 Major --- 1 pasoul.peng webkit-unassigned bfulgham jer.noble pvollan webkit-bug-importer oldest_to_newest 1743687 0 pasoul.peng 2021-03-25 00:45:22 -0700 An error is reported when playing h5 audio or video elements in wkwebview: Error acquiring assertion: <Error Domain=RBSAssertionErrorDomain Code=3 "Required client entitlement is missing" UserInfo={RBSAssertionAttribute=<RBSDomainAttribute| domain:"com.apple.webkit" name:"MediaPlayback" sourceEnvironment:"(null)">, NSLocalizedFailureReason=Required client entitlement is missing}> Then the performance of the webview will become very poor, no response to any element click.This problem has affected our tens of thousands of users.The current solution is to call the client method to play audio.How to solve the problem fundamentally? 1743919 1 ap 2021-03-25 14:40:21 -0700 What is h5 audio? Can you please elaborate steps to reproduce? 1743920 2 webkit-bug-importer 2021-03-25 14:40:31 -0700 <rdar://problem/75854010> 1744038 3 pasoul.peng 2021-03-25 19:11:54 -0700 1.There is an audio element and a button button in my HTML file. Click the button to play audio. ``` <body> <button onclick="handleClick()">PLAY</button> <audio id="audio" src="https://ac-dev.oss-cn-hangzhou.aliyuncs.com/test-2022-music.mp3"></audio> <script> function handleClick() { document.getElementById("audio").play(); } </script> </body> ``` 2.Create a wkwebview to load the html file in my demo APP. ``` class ViewController: UIViewController , WKUIDelegate{ var webView: WKWebView! override func loadView() { let config = WKWebViewConfiguration() config.preferences.javaScriptEnabled = true config.allowsInlineMediaPlayback = true webView = WKWebView(frame: .zero, configuration: config) //.zero webView.uiDelegate = self view = webView } override func viewDidLoad() { super.viewDidLoad() let myURL = URL(string: "https://ac-dev.oss-cn-hangzhou.aliyuncs.com/test-2022-py.html") let myRequest = URLRequest(url: myURL!) webView.load(myRequest) } } ``` 3.Click the button in the HTML to play the audio, and you can see the error report on the xcode. ``` iPadN[2133:855729] [assertion] Error acquiring assertion: <Error Domain=RBSAssertionErrorDomain Code=3 "Required client entitlement is missing" UserInfo={RBSAssertionAttribute=<RBSDomainAttribute| domain:"com.apple.webkit" name:"MediaPlayback" sourceEnvironment:"(null)">, NSLocalizedFailureReason=Required client entitlement is missing}> ``` 4.To sum up, this error will appear when playing audio or video in HTML. Then the app performance will drop a lot, and the interactive response will be very slow. 1744473 4 webkit-bug-importer 2021-03-27 02:54:01 -0700 <rdar://problem/75917755>