Safari cannot open the page due to the error 'WebKit encountered an internal error.' We are using https://github.com/stleamist/BetterSafariView.git, and it was working fine before we updated to Xcode 16.

Hello everyone, in my website I need to give users the ability to choose a color via input type=“color”. I don't understand why it works fine on desktop (even on Safari for Mac) but doesn't open the color picker on iPhone. How can I solve this? Thank you, Andrea

We have an ObjC-based Mac App utility. A fair fraction of the functionality is built in JavaScript and resides in a couple of WKWebViews so that we can more easily share code with other platforms. Because it is a utility, usually the application will be hidden or at least not the frontmost application. But if the user hits a hotkey or provides certain other inputs, the app should respond immediately with a series of actions. In the Obj-C part of the code, we can do this to alert the system that our non-visible, non-active, application is doing something in response to the user input: [[NSProcessInfo processInfo] beginActivityWithOptions: NSActivityUserInitiatedAllowingIdleSystemSleep reason: @"Do the Thing"] To get the JavaScript to do the work needed, we call evaluateJavaScript:completionHandler: on one of the WKWebViews. The JavaScript performs a series of computations, then uses window.webkit.messageHandlers.xxxx.postMessage to return results to the ObjectiveC code, which then takes action based on various SDKs, and the user sees the result. The problem we are encountering is relatively infrequent, but it appears that macOS puts the 'Web Content' process (which every WKWebView has) to sleep, and sometimes delays of many seconds (sometimes over 15 seconds) occur between the evaluateJavaScript:completionHandler: call and the postMessage response. These observed delays are not related to complexity of the JavaScript computations or the amount of data being processed. Using the Console, we can see that evaluateJavaScript:completionHandler: seems to result in this message: 0x104682280 - [PID=0, throttler=0x1046e8498] ProcessThrottler::Activity::Activity: Starting background activity / 'WebPageProxy::runJavaScriptInMainFrameScriptWorld' Then shortly afterward: 0x104682280 - [PID=0, throttler=0x1046e8498] ProcessThrottler::Activity::invalidate: Ending background activity / 'WebPageProxy::runJavaScriptInMainFrameScriptWorld' So it seems that evaluateJavaScript:completionHandler: "wakes up" the WKWebView similar to the beginActivityWithOptions:. But many parts of our computation do some work, then expect the next "tick" in JavaScript to continue using the partial result to produce more work. I suspect that the delays are related to the WKWebView being put "back to sleep" before all the "next tick" code executes. Because these actions are taken in response to user invocation, delays of more than a fraction of a second are instantly noticeable and result in user dismay. Are there any configuration settings that can prevent the 'Web Content' process from going to sleep? Or (better) techniques or mechanisms that would force the process to "stay awake longer"? (Keeping in mind that the WKWebView is likely not visible, and/or the containing window may be hidden.)

iOS18 Added support for WebRTC HEVC RFC 7789 RTP Payload Format. (112001659)，How can i determine whether iOS 18 WebRTC uses hardware or software decoding for HEVC?

Recently, we ran into a bit of a problem when using WKWebView. Sometimes, problems with all pages blank occur which use WKWebView. I implemented WKNavigationDelegate and found that it stops at - (void)webView:(WKWebView *)theWebView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler and it won't call below func forever - (void)webView:(WKWebView*)theWebView didStartProvisionalNavigation:(WKNavigation*)navigation I suspected that the render process is terminated and it won't restart. Then i try to resolve this problem by call reload func [self.webView reload]; But it didn't work. In The Meanwhile, i got some error message in console I have tested it in iOS 16 and 17. only iOS 17 got the issue. Pray for some help. Thanks a lot.

I'm developing an application that utilizes WKWebView to display a webpage. My goal is to improve the performance and loading speed of this webpage by intercepting specific API calls and providing pre-stored JSON responses directly from within the app, ensuring the webpage renders instantaneously. The challenge I am encountering is the inability to intercept HTTPS URL schemes directly from WKWebView. Any insights or solutions from the community on how to effectively manage and overwrite these particular network requests would be greatly appreciated.

I'm injecting some javascript into a WKWebview on iOS. At a certain point the web view spits out these warnings into the console and the javascript execution stops. 0x109018c40 - [PID=778] WebProcessProxy::gpuProcessExited: reason=IdleExit 0x109019200 - [PID=779] WebProcessProxy::gpuProcessExited: reason=IdleExit Failed to terminate process: Error Domain=com.apple.extensionKit.errorDomain Code=18 "(null)" UserInfo={NSUnderlyingError=0x303c3c060 {Error Domain=RBSRequestErrorDomain Code=3 "No such process found" UserInfo={NSLocalizedFailureReason=No such process found}}} I can't find any solution for this so am looking if anyone has any idea of what to try. None of the WKWebview delegate functions trigger when this occurs so I can't attempt to reload the webview at this stage

I am trying to access a camera from web view and I'm unable to load the updated UI in web view and web view gets flick for every few seconds. The updated UI has some more functionality, but the web page not getting loaded.

Running a web server on localhost is breaking on the iOS Simulator. It is also blocking me from testing my mobile application. Full Log: Full Log

Since my question exceeds 700 words, please check it in the attachment. Thank you! Question

We as a team of engineers work on an app intended to visualize medical images. The type of situations where the app is used involves time critical decision making for acute clinical conditions. Stability of the app and performance are of almost importance and can directly help timely treatment action. The app we are developing uses Javascript. It has been observed the footprint of the app is lagging by 2 to 3 seconds in releasing memory while javascript is expecting the memory to be cleared. This is affecting the stability of our application and preventing us in delivering the right quality of application. The problem specifically can be described as follows, using javascript create an array and then remove it and after removal of the array, create a new array of the same size immediately and again remove it. Because the memory is not released in time, if you repeat these steps a few times the app memory footprint will increase and that crashes the app. To reproduce this scenario, we have created a simple app which creates an array with size of 100MB and checks the memory footprint using the Xcode instrument tool. When we create an array of 100MB size, sometimes it shows the memory footprint peak of around 700MB-800MB and when we clear the array by assigning it with an empty array it releases the memory after 2-3 seconds. Considering the critical nature of the app, I urge you to look into this and provide necessary support and resolution. Please refer below sample code that will help to reproduce the mentioned scenario. import UIKit import WebKit class ViewController: UIViewController, WKUIDelegate { @IBOutlet var webView: WKWebView! let myHTML = """ <!DOCTYPE html> <html> <head> <style> .button-style { width: 400px; height: 200px; margin: 15px; font-size: 50px; } </style> </head> <body> <button type="button" class="button-style" onclick="loadDataInCache()">Load Data In Cache</button> <button type="button" class="button-style" onclick="removeDataFromCache()">Clear Cache</button> <script> const size = 1024 * 1024 * 100; let numberArray = []; function loadDataInCache() { numberArray = Array(size).fill(0); } function removeDataFromCache() { numberArray = []; } </script> </body> </html> """ override func viewDidLoad() { super.viewDidLoad() // self.view.addSubview(webView) webView.loadHTMLString(myHTML, baseURL: nil) } override func loadView() { let webConfiguration = WKWebViewConfiguration() webView = WKWebView(frame: .zero, configuration: webConfiguration) webView.uiDelegate = self view = webView } }

PLATFORM AND VERSION iOS Development environment: Other: Xamarin iOS App Run-time configuration: iOS 14.4.2 and above DESCRIPTION OF PROBLEM We are using WKWebView control in our application. It loads a page, wherein there is a code which gets triggered to execute a Synchronous Ajax/XmlHttpRequest. This request needs about 1 min time to complete, but it gets aborted after 10 secs. Observed in iPhone 6S 14.4.2. Also seen the same behavior in the latest version of iPhone and iPad OS. Need help on the below points: How can I extend this timeout? Making it an Asynchronous call would have regression. Hence the ask for any other alternative to extend this timeout. STEPS TO REPRODUCE In the WKWebView have a webpage, which gives a Synchronous ajax/XmlHttpRequest call to a Web API, which takes more than 10 seconds to complete. The Ajax call sample code is as below, which uses jquery: var startTime = performance.now(); $.ajax({ async: false, // Synchronous ajax call type: "POST", url: "http://testsite:8000/api/RunTestTimer", contentType: "application/json; charset=utf-8", data: JSON.stringify({ timeInSeconds: 15 }), // timeInSeconds is the parameter name in the Web API, which I used to run a timer on the server-side for the value passed to the ajax call dataType: "json", beforeSend: skelta.forms.utilities.addRequestHeaders }) .done(function (result) { var endTime = performance.now(); var message = "Request Successful (Time Taken to execute: " + ((endTime - startTime) / 1000).toFixed(3) + " secs; Type: " + "POST" + "; Async: " + "FALSE" + "; Timer: " + "15" + " seconds):" + JSON.stringify(result); console.log(message); }) .fail(function (result) { var endTime = performance.now(); var message = "Request Failed (Time Taken to execute: " + ((endTime - startTime) / 1000).toFixed(3) + " secs; Type: " + "POST" + "; Async: " + "FALSE" + "; Timer: " + "15" + " seconds):" + JSON.stringify(result); console.log(message); });

I am experiencing an issue with my app, which includes a WKWebView used for displaying and playing WebRTC content (audio and video). Everything works fine on macOS, but on iOS 18, while the video is displayed correctly, there is no sound. I am wondering if this could be related to privacy permissions on iOS. Could you please clarify if there are any specific privacy permissions I need to address? I would like to confirm： AVAudioSession.sharedInstance().setCategory requires any special configuration for WebRTC audio. Are there any particular settings needed for this? My setting codes are below: try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default, policy: .longFormAudio) Do the JavaScript codes in the HTML file require any special handling to ensure WebRTC audio works properly on iOS? const audioRender = document.createElement('audio'); audioRender.id = 'xxxid'; audioRender.srcObject = streamSource; audioRender.autoplay = true; audioHolder.appendChild(audioRender); Does WKWebViewConfiguration need any specific parameter adjustments to ensure audio playback in WebRTC works as expected? let webViewConfiguration = WKWebViewConfiguration() let contentController = WKUserContentController() contentController.add(self, name: "xxx") webViewConfiguration.userContentController = contentController webViewConfiguration.allowsInlineMediaPlayback = true

Dear Apple Support Team, Upon upgrading to iOS 18, I have noticed a marked change in the character spacing of the PingFang font when rendered by WebKit, the web content rendering engine utilized by Safari and other web views in iOS. Specifically, the spacing between characters appears to have increased or altered in a manner that is not consistent with previous iOS versions or with the font's specifications as defined in CSS. This issue has significantly impacted the visual presentation of my web pages, causing a notable deviation from the intended design and potentially affecting user experience. Expected Behavior: The character spacing of PingFang font in WebKit on iOS 18 should maintain consistency with previous versions or adhere strictly to CSS specifications, ensuring a seamless transition for web developers and end-users alike. Request for Assistance: Could you please investigate this issue and confirm if it is a known bug or an intentional change in iOS 18? If it's a bug, could you provide an estimated timeline for a fix or a workaround that we can implement in the meantime? Additionally, any guidance on how to best address this issue in our H5 content, such as alternative font choices or CSS hacks, would be greatly appreciated. Thank you for your attention to this matter. We value the stability and consistency of the WebKit engine and the overall iOS platform, and we look forward to your prompt response and resolution.

When voiceover is turned on in IOS devices the video controls like pause/resume, forward , backward are not working in inline mode and works fine in fullscreen. The controls are announced properly in voiceover,but when we press it, it is not performing any action at all. We used HTML5 video tag to display mp4 video in our app.we have added all necessary accessibility tags as well. We also observe the same issue is happening in the w3school web page. Attaching the link here for reference. (https://www.w3schools.com/html/tryit.asp?filename=tryhtml5_video) Could you please guide us why the video controls are not working. Is there anything we want to change or any update needed from the safari side.

Hi Team, We have been working on one image processing app developed using react. In this app we are making the XMLHttpRequests to the server and storing the response in the cache which has around 200MB - 250MB of size. We are tracking the memory footprint using the Xcode instrument tool. While downloading and rendering the data in app the Xcode instrument shows the memory footprint around 800MB - 1000MB. We are assuming that garbage collection is not working as expected or some resources are not released after use and because of this we get this high memory footprint for 200MB - 250MB data. If the data is changed then we are removing the existing data from cache and storing the new data. But here, when we delete the data from cache, it does not release the memory immediately and takes some time of 3 seconds or more. In between this, the memory gets allocated to new data too and that increases the overall memory footprint of the app and in some cases the app is crashing. The maximum memory we have seen is average 1.5GB which varies with the device configuration. When we try the same activity on a safari browser where memory gets released immediately. If an app releases the initial acquired memory while loading new data we see very less app crashes. We need help to understand if there is a way to release the memory immediately to avoid the app crash. To reproduce this scenario, we have created a simple app which creates an array with size of 100MB and checks the memory footprint using the Xcode instrument tool. When we create an array of 100MB size, sometimes it shows the memory footprint peak of around 700MB-800MB and when we clear the array by assigning it with an empty array it releases the memory after 2-3 seconds. Created an array and then removed it and after removal of the array, created a new array of the same size immediately and again removed it. Because the memory is not released in time, if you repeat these steps a few times the app memory footprint will increase and that crashes the app.

以下是包含完整日誌的回報範本： Title: WKWebView File Upload Causes App Crash When Selecting Camera or Recording Options Body: Hello, I am experiencing a critical issue with WKWebView in our iOS app when handling file uploads. We are using the following HTML element to allow users to capture images or videos, select from their photo library, or choose a file from the file system: <input type="file" accept="image/*;capture=camera" id="cameraInput"> Issue Description: When a user selects the camera or recording option, the app immediately crashes and returns to the WKWebView screen. This issue does not occur when selecting a file from the photo library or file system. Logs: Below are the relevant logs captured when the issue occurs: Presenting view controller <_UIContextMenuActionsOnlyViewController: 0x1034349e0> from detached view controller <MailVwCtl: 0x103838800> is not supported, and may result in incorrect safe area insets and a corrupt root presentation. Make sure <MailVwCtl: 0x103838800> is in the view controller hierarchy before presenting from it. Will become a hard exception in a future release. RotateN2:<MailVwCtl: 0x103838800> RotateN2:<MailVwCtl: 0x103838800> RotateN1:<Mail2000ViewController: 0x10350b780> RotateN2:<Mail2000ViewController: 0x10350b780> RotateN2:<MailVwCtl: 0x103838800> RotateN2:<MailVwCtl: 0x103838800> RotateN2:<Mail2000ViewController: 0x10350b780> RotateN1:<Mail2000ViewController: 0x10350b780> RotateN2:<Mail2000ViewController: 0x10350b780> RotateN2:<Mail2000ViewController: 0x10350b780> RotateN2:<Mail2000ViewController: 0x10350b780> RotateN2:<Mail2000ViewController: 0x10350b780> Unknown chipRevisionID (0xffffffff) Attempted to change to mode Portrait with an unsupported device (BackWideDual). Auto device for both positions unsupported, returning Auto device for same position anyway (BackAuto). Attempted to change to mode Portrait with an unsupported device (BackWideDual). Auto device for both positions unsupported, returning Auto device for same position anyway (BackAuto). Attempted to change to mode Portrait with an unsupported device (BackAuto). Auto device for both positions unsupported, returning Auto device for same position anyway (BackAuto). Attempted to change to mode Portrait with an unsupported device (BackWideDual). Auto device for both positions unsupported, returning Auto device for same position anyway (BackAuto). RotateN2:<Mail2000ViewController: 0x10350b780> RotateN2:<Mail2000ViewController: 0x10350b780> RotateN2:<Mail2000ViewController: 0x10350b780> WillDsAr:<MailVwCtl: 0x103838800> RotateN1:<Mail2000ViewController: 0x10350b780> RotateN2:<Mail2000ViewController: 0x10350b780> DidDsAr:<MailVwCtl: 0x103838800> <Mail2000ViewController: 0x10350b780>:VwWillAppear:1:x0 willAr:1,Fm:0,20,375,792-<MailVwCtl: 0x103838800> willAr:1,Bd:0,0,375,792-<MailVwCtl: 0x103838800> <MailVwCtl: 0x103838800>:VwDidAP: VwDidAP:Bd:0,0,375,792-<MailVwCtl: 0x103838800> VwDidAP:Fm:0,20,375,792-<MailVwCtl: 0x103838800> VwDiDAP:SetFm:0,20,375,792-<MailVwCtl: 0x103838800> ToolVwSetVwSize0:main,0,24,w=375,h=668,stepInd=0 ToolVwSetVwSize0:toobar_self,0,692,w=375,h=66 ToolVwSetVwSize:w=375,h=792 ToolVwSetVwSize1:main,0,0,w=375,h=727 ToolVwSetVwSize1:ToolBar,0,727,w=375,h=792 RotateN2:<Mail2000ViewController: 0x10350b780> RotateN2:<Mail2000ViewController: 0x10350b780> <Mail2000ViewController: 0x10350b780>:VwDidAppear:1:x0 M2KVC_DidAp0:0.000000 0.000000 375.000000 812.000000 Additional Context: This issue is critical as it affects the user experience severely. Notably, we have a similar issue in our Android app using WebView. In that case, the file upload options for camera, recording, and file selection do not appear at all, restricting users to only upload files from the phone's storage. We would like to inquire whether there have been recent changes to the APIs related to WKWebView and WebView or any known issues that could be causing this behavior. We are also concerned this might be a side effect of recent bug fixes or updates to WKWebView. Additional Context: This issue appears to be specific to iOS 17. We have tested the same functionality on devices running iOS versions below 17, and the camera and recording options work as expected without any crashes. This suggests that the issue may be introduced in iOS 17. You can view a video demonstrating the issue at this link: https://share.icloud.com/photos/001voevXriVXsEUmhzGsFBtSA Environment: iOS version: 17.6.1&17.5.1 Device: iPhone 15 Pro Max& iPhone 12 WKWebView version: [Your WKWebView version, if known] App platform: iOS Xcode version: 15.1 We appreciate any insights or guidance you can provide on this matter. Thank you.

When using the system input method to input Chinese, deleting the input character will crash when the last character is deleted. crash info： reason:NSMutableRLEArray objectAtIndex:effectiveRange:: Out of bounds -[WKContentView(WKInteraction) setAttributedMarkedText:selectedRange:]_block_invoke -[WKContentView(WKInteraction) objc_msgSend$attributesAtIndex:effectiveRange: （像是WebKit处理系统输入法删除输入信息时，处理文本编辑的问题）

If a sufficiently long text in an HTML tag leads to a text wrap, the calculated values (y and width) of getBoundingClientRect for characters or words directly after the wrap are not correct, if the element or one of a parent is contenteditable="true" the y value has the value as if it were still before the break the width value spans the entire width, Here a code that reproduces this failure: https://stackblitz.com/edit/vitejs-vite-jwghts?file=src%2Fmain.ts,src%2FcalcLetterRects.ts,src%2Fstyle.css

We have tested on iPhone 12 Pro and observed that Safari allowed approximately 1.5GB of RAM usage. Page refreshes when trying to allocate more memory. After performing a hard reset and erasing all content, I noticed that Safari allowed approximately 3GB of RAM usage for our webpage. However, after 2-3 days, the maximum allowable RAM usage in Safari decreases to about 1.5GB. Once 1.5GB limit is reached, the system reloads the page. To further investigate, I performed another hard reset on my device, and once again, Safari allowed around 3GB of RAM usage. Additionally, we tested this on iPhone 15 Pro and 15 Pro Max, where the RAM limitation in Safari is consistently around 3GB (page is reloading after reaching 3GB). Could you please clarify why the memory limit fluctuates after hard reset? Is there any specific setting or flag within Safari or iPhone that controls the maximum RAM usage, which could be causing this behavior? I also posted the issue there: https://bugs.webkit.org/show_bug.cgi?id=277848 I would appreciate any guidance or potential solutions to this issue. If this is a known limitation or issue, understanding the root cause would be extremely helpful. Thank you for your attention to this matter. Model Name: iPhone 12 Pro iOS Version: 17.5.1 Capacity: 128gb