Hi, I am following the session to make some test, but when I execute createFourStopwatchesDemo the safari ended with not any result, it should log more infos like 'StopWatch started'... Environment : Mac OSX 11.4 Safari Technology Prview 14.2 The Safari console only shows like below When I execute 'createFourStopwatchesDemo()' Here is my code. //Example1 //class with public variable and function class StopWatchWithOneButton { _startTime = 0; click(){ if (!this._startTime) { this.start(); }else{ this.stop(); } } start() { this._startTime = Date.now(); console.log('StopWatch started'); } stop() { let duration = Date.now() - this._startTime; this._startTime = 0; console.log('StopWatch stopped after %d ms', duration); } } //class with private variable and function class PrivateStopWatchWithOneButton { #_startTime = 0; static #stopWatchCount = 0; click(){ if (!this.#_startTime) { this.#start(); }else{ this.#stop(); } } #start() { PrivateStopWatchWithOneButton.#stopWatchCount++; this.#_startTime = Date.now(); console.log('StopWatch started'); } #stop() { PrivateStopWatchWithOneButton.#stopWatchCount--; let duration = Date.now() - this.#_startTime; this.#_startTime = 0; console.log('StopWatch stopped after %d ms', duration); } } function sleep(ms) { return new Promise(resolve => setTimeout(resolve, ms)); } async function demo(){ // console.log(StopWatchWithOneButton._startTime); var counter = new StopWatchWithOneButton(); counter.click(); console.log('sleep for a while,' + counter._startTime); await sleep(2000); console.log('ake up'); counter.click(); //private #_startTime var priCounter = new PrivateStopWatchWithOneButton(); // console.log('sleep for a while of Private:' + priCounter.#_startTime);//syntax error priCounter.click(); await sleep(2000); priCounter.click(); } //Example2: weak reference //WeakRef(obj): create weak reference to an object //use FinalizationRegistry to delete object automaticaly const allStopWatches = new Map(); var nextAvailableIdentifier = 1; function removeStopwatch(identifier){ allStopWatches.delete(identifier); } const finalizationRegistry = new FinalizationRegistry(removeStopwatch); function createStopwatch(){ let identifier = nextAvailableIdentifier++; let stopwatch = new StopWatchWithOneButton(); allStopWatches.set(identifier, new WeakRef(stopwatch)); finalizationRegistry.register(stopwatch, identifier);//the first parameter is an object return stopwatch; } function clickAllStopwatches(){ for(let weakStopwatch in allStopWatches){ //weakStopwatch.deref(): Get the element from the weak reference, if it still exists weakStopwatch.deref()?.click(); } } function createFourStopwatchesDemo(){ for (let i = 0; i < 4; i++) { let currStop = createStopwatch(); } clickAllStopwatches(); } Appreciate for reply in advance ~

Since I am not  familiar with the JavaScript, it will spend days for me to experience these new features, could you send me a copy of the example code? many thanks, my email is cveric AT foxmial.com.

Hi,everyone , Recently I update my iphone 12pro max system to iOS14.6 system , One of the HTTPS request connect to our server works fine on iOS14.5.1 and eariler iOS versions, but it fails only on iOS14.6,the error message shows like below : Error Domain=NSURLErrorDomain Code=-1202 "此服务器的证书无效。您可能正在连接到一个伪装成“a.b.c.com”的服务器，这会威胁到您的机密信息的安全。" UserInfo={NSURLErrorFailingURLPeerTrustErrorKey=&lt;SecTrustRef: 0x28103fd50&gt;, NSErrorFailingURLKey=https://a.b.c.com/path/to/specific/work/get, NSErrorFailingURLStringKey=https://a.b.c.com/path/to/specific/work/get, NSLocalizedDescription=此服务器的证书无效。您可能正在连接到一个伪装成“a.b.c.com”的服务器，这会威胁到您的机密信息的安全。} but we had double check the certicicate of the service, pretty sure it's ok, and the certificate was approved by go_daddy, but it only happens on iOS14.6, and now all of our user update to iOS14.6 encountered this problem, anyone can help, thanks a million.