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Apple Pay Web: Multiple active PPCs for one Merchant ID?
Hi,
 We’re implementing Apple Pay on the Web for a multi-tenant platform via a PSP. The PSP operates multiple HSM/clusters and gave us multiple CSRs, asking us to register all.
Our understanding: a Merchant ID can hold several PPCs over time, but only one is active at once. Questions Is there any supported way to keep more than one PPC active simultaneously for the same Merchant ID? If not, what does Apple recommend for web-only, multi-tenant setups: a single MID with PSP-side decryption & sub-merchant separation, or separate MIDs per brand/region? Any official guidance on PPC rotation and handling many domains for Apple Pay on the Web? links to official docs or prior Apple responses would be appreciated.
Topic: Safari & Web SubTopic: General Tags:
1
0
891
Aug ’25
Does WKWebview support encrypted DNS when using Network.framework PrivacyContext Api?
After App uses Network.framework PrivacyContext Api, dns has been encrypted, that is good. But when using wkwebview to load web page, wireshark captures normal dns request sent by wkwebview. Does wkwebview use DoH to resolve domain? if can, how to config params? If can not, is there anyway to stop wkwebview sending normal dns, such as local proxy.
Topic: Safari & Web SubTopic: General Tags:
2
0
271
Jan ’26
header and footer positions shifted in Safari tab settings
Thank you for supporting me. My environment Device: iPhone 15 Pro OS: iOS 26.0 Public Beta (23A5336a) In iOS 26, three types of tabs were added to Safari. Depending on the option, the behavior of the fixed header and footer can be unstable. *Tab settings can be changed in the iOS Settings app under "Apps -> Safari" > "Tabs." The following behavior differs depending on the tab. Compact When scrolling down, the header and footer shift up by a few pixels. A margin is created between the footer and the URL input field. Bottom Behaves the same as "Compact." Top The header is completely hidden below the URL input field at the top of the screen, leaving a margin below the footer. Below is the sample code to check the operation. <!doctype html> <html lang="ja"> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width,initial-scale=1" /> <title>固定ヘッダー/フッター + モーダル</title> <style> :root { --header-h: 56px; --footer-h: 56px; } body { margin: 0; font-family: sans-serif; line-height: 1.6; background: #f9fafb; padding-top: var(--header-h); padding-bottom: var(--footer-h); } header .inner, footer .inner { width: 100%; max-width: var(--max-content-w); padding: 0 16px; display: flex; align-items: center; justify-content: space-between; } header, footer { position: fixed; left: 0; right: 0; display: flex; align-items: center; justify-content: center; z-index: 100; background: #fff; } header { top: 0; height: var(--header-h); border-bottom: 1px solid #ddd; } footer { bottom: 0; height: var(--footer-h); border-top: 1px solid #ddd; } main { padding: 16px; } .btn { padding: 8px 16px; border: 1px solid #2563eb; background: #2563eb; color: #fff; border-radius: 6px; cursor: pointer; } /* モーダル関連 */ .modal { position: fixed; inset: 0; display: none; z-index: 1000; } .modal.is-open { display: block; } .modal__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.5); } .modal__panel { position: relative; max-width: 600px; margin: 10% auto; background: #fff; border-radius: 8px; padding: 20px; z-index: 1; } .modal__head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; } .modal__title { margin: 0; font-size: 18px; font-weight: bold; } .modal__close { background: none; border: none; font-size: 20px; cursor: pointer; } </style> </head> <body> <header> <div class="inner"> <h1>デモページ</h1> <button id="openModal" class="btn">モーダルを開く</button> </div> </header> <main class="container" id="main"> <h2>スクロール用の適当なコンテンツ1</h2> <p>ヘッダーとフッターは常に表示されます。モーダルボタンを押すと、画面いっぱいのダイアログが開きます。</p> <!-- ダミーカードを複数 --> <section class="grid"> <div class="card"><strong>カード1</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード2</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード3</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード4</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード5</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード6</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード7</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード8</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード9</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード10</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> </section> </main> <footer> <small>&copy; 2025 Demo</small> </footer> <!-- モーダル --> <div class="modal" id="modal"> <div class="modal__backdrop"></div> <div class="modal__panel"> <div class="modal__head"> <h2 class="modal__title">モーダル</h2> <button class="modal__close" id="closeModal">&times;</button> </div> <p>これは白いビューのモーダルです。背景は黒く半透明で覆われています。</p> </div> </div> <script> const modal = document.getElementById('modal'); const openBtn = document.getElementById('openModal'); const closeBtn = document.getElementById('closeModal'); const backdrop = modal.querySelector('.modal__backdrop'); openBtn.addEventListener('click', () => { modal.classList.add('is-open'); }); function closeModal() { modal.classList.remove('is-open'); } closeBtn.addEventListener('click', closeModal); backdrop.addEventListener('click', closeModal); window.addEventListener('keydown', (e) => { if (e.key === 'Escape' && modal.classList.contains('is-open')) { closeModal(); } }); </script> </body> </html>
Topic: Safari & Web SubTopic: General Tags:
3
0
846
Sep ’25
WebView permission
Hi, I'm using a webview in Swift, where I load an html file locally. Basically I have an angular project built and loaded directly into my app bundle. The webview requires the use of the camera. I request permissions via and javascript, the pop-up appears, I accept the permissions and the app works correctly. Only that after a certain number of seconds, the permissions are requested again. It's as if the webview doesn't cache the accepted permissions. Is this normal behavior?
Topic: Safari & Web SubTopic: General Tags:
1
0
225
May ’25
JavascriptCore crashes with pas_reallocation_did_fail
Hi, My app is using JavascriptCore to run the business logic in a javascript environment. We are randomly seeing crashes when users move the app back to the foreground. These crashes are reported by Firebase (I am attaching an example). I also tried to find them in Organizer, but the stacktraces don't match and I am not sure if they are pointing to the same error (I attach one just in case). I was trying to investigate a little bit about this, but I could find any explanation about what pas_reallocation_did_fail would mean. Here is our implementation: -(void) enqueueCallback:(JSValue *)callback withArguments:(NSArray *)args exclusive:(BOOL)exclusive { [self enqueueBlock:^{ @autoreleasepool { [callback callWithArguments:args]; } } exclusive:exclusive]; } Basically, every JS block is enqueued and then run by a dedicated thread specific to our JSContext. Can I get some help? Thanks in advance! Crashlytics.txt 2024-08-30_10-00-01.2572_-0400-f757f8306eda9679ec1b2ff90fbc66c4eb1fbee7.crash
Topic: Safari & Web SubTopic: General Tags:
3
0
625
Jul ’25
Safari Technology Preview closes unexpectedly on external monitor
If the Safari Technology Preview window is located on an external monitor with DisplayLink and the computer goes to sleep (screen saver), when it returns, it closes with an error. If the window is located on another monitor that is connected by USB, it does not close. Equipo: Macbook Pro M4 Pro SO: MacOS Sequoia 15.6.1 Safari Technology Preview: Release 227 (preview version work fine) DisplayLink Manager: 13.0.1 (build 46)
Topic: Safari & Web SubTopic: General Tags:
6
0
291
Sep ’25
Request for Native AJAX API Request Interception Support in WKWebView
Hello WebKit Team, I’m writing to ask if iOS provides a native way to intercept AJAX (XMLHttpRequest or fetch) calls inside WKWebView. On Android, this is handled via: shouldInterceptRequest(WebView view, WebResourceRequest request) but iOS currently seems to have no equivalent. We’ve tried: WKURLSchemeHandler → works only for custom schemes URLProtocol with WKProcessPool → unreliable for AJAX in WebView JavaScript injection → partial and unofficial Could you please clarify: Is there a recommended native approach to intercept AJAX requests? If not supported, is it planned for future releases? Any official workaround or guidance? This is critical for debugging, analytics, and compliance in hybrid apps.
Topic: Safari & Web SubTopic: General Tags:
3
0
1k
Dec ’25
window.opener is null with WKWebview
My iOS app uses a WKWebView with a WKUIDelegate method (webView:createWebViewWithConfiguration:forNavigationAction:windowFeatures:) to handle popup windows. This works for most cases, but during OAuth flows on certain sites (e.g., canva.com), the popup WKWebView attempts to send results back to the main WKWebView using JavaScript like window.opener.postMessage(...). However, window.opener is always null in the popup, preventing the message from being posted and blocking login completion.I've researched this and found suggestions that it's by design, as WKWebView instances are isolated for security reasons. Has anyone encountered this and found a reliable workaround (e.g., bridging communication between the main and popup WKWebViews without relying on window.opener)?
Topic: Safari & Web SubTopic: General Tags:
1
0
264
Dec ’25
pas_panic_on_out_of_memory_error crash on tvOS 15.4 and 15.4.1
Hi there, I'm experiencing several crashes on JavaScriptCore pas_panic_on_out_of_memory_error, only on devices with tvOS 15.4 and 15.4.1. This happens with users using the app for several hours as well as 5 seconds after launching the app. Devices: AppleTV6,2 and AppleTV5,3 Thread 14 — JavaScriptCore pas_panic_on_out_of_memory_error (JavaScriptCore) JavaScriptCore bmalloc_try_iso_allocate_impl_impl_slow (JavaScriptCore) JavaScriptCore bmalloc_heap_config_specialized_local_allocator_try_allocate_small_segregated_slow (JavaScriptCore) JavaScriptCore bmalloc_allocate_impl_casual_case (JavaScriptCore) JavaScriptCore ***::String::String(char16_t const*, unsigned int) (JavaScriptCore) JavaScriptCore JSC::LiteralParser<char16_t>::parsePrimitiveValue(JSC::VM&) (JavaScriptCore) JavaScriptCore JSC::LiteralParser<char16_t>::parse(JSC::ParserState) (JavaScriptCore) JavaScriptCore JSC::jsonProtoFuncParse(JSC::JSGlobalObject*, JSC::CallFrame*) (JavaScriptCore) JavaScriptCore llint_entry (JavaScriptCore) JavaScriptCore llint_entry (JavaScriptCore) JavaScriptCore llint_entry (JavaScriptCore) JavaScriptCore llint_entry (JavaScriptCore) JavaScriptCore vmEntryToJavaScript (JavaScriptCore) JavaScriptCore JSC::Interpreter::executeCall(JSC::JSGlobalObject*, JSC::JSObject*, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) (JavaScriptCore) JavaScriptCore JSC::boundThisNoArgsFunctionCall(JSC::JSGlobalObject*, JSC::CallFrame*) (JavaScriptCore) JavaScriptCore vmEntryToNative (JavaScriptCore) JavaScriptCore JSC::Interpreter::executeCall(JSC::JSGlobalObject*, JSC::JSObject*, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) (JavaScriptCore) JavaScriptCore JSC::profiledCall(JSC::JSGlobalObject*, JSC::ProfilingReason, JSC::JSValue, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) (JavaScriptCore) JavaScriptCore JSObjectCallAsFunction (JavaScriptCore) JavaScriptCore -[JSValue invokeMethod:withArguments:] (JavaScriptCore) ITMLKit -[IKJSObject invokeMethod:withArguments:] (ITMLKit) ITMLKit -[IKJSEventListenerObject invokeMethod:withArguments:thenDispatchEvent:extraInfo:] (ITMLKit) ITMLKit __43-[IKJSXMLHTTPRequest setRequestReadyState:]_block_invoke (ITMLKit) ITMLKit -[IKAppContext _doEvaluate:] (ITMLKit) ITMLKit -[IKAppContext _evaluate:] (ITMLKit) ITMLKit __41-[IKAppContext evaluate:completionBlock:]_block_invoke (ITMLKit) ITMLKit -[IKAppContext _sourcePerform] (ITMLKit) ITMLKit -[IKConcurrentEvaluator lockSchedulingForEvaluation:] (ITMLKit) ITMLKit IKRunLoopSourcePerformCallBack (ITMLKit) CoreFoundation __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ (CoreFoundation) CoreFoundation __CFRunLoopDoSource0 (CoreFoundation) CoreFoundation __CFRunLoopDoSources0 (CoreFoundation) CoreFoundation __CFRunLoopRun (CoreFoundation) CoreFoundation CFRunLoopRunSpecific (CoreFoundation) ITMLKit -[IKAppContext _jsThreadMain] (ITMLKit) Foundation __NSThread__start__ (Foundation) libsyste...ad.dylib _pthread_start (libsystem_pthread.dylib) libsyste...ad.dylib thread_start (libsystem_pthread.dylib) This issue seems very similar to this existing thread, although not sure its related
Topic: Safari & Web SubTopic: General Tags:
16
0
2.6k
Jul ’25
关于 WKWebView 加载本地文件时 localStorage 数据丢失的情况
在 iOS 平台使用 WKWebView 通过file://协议加载本地 HTML 文件时，存储在localStorage中的数据会在 App 后台切换、进程重启后偶尔丢失；但相同代码在安卓 / 鸿蒙平台无此问题。 现在的文档 仅明确了「默认数据存储（defaultDataStore）可将网站数据持久化到磁盘，非持久化存储（nonPersistent）仅存内存」的基础规则； 未提及「file://协议内容即使使用默认持久化存储，也会被归为临时内存存储」这一关键场景限制； 仅在WKURLSchemeHandler关联说明中隐含「自定义 URL 协议可处理 WebKit 原生不支持的 URL 方案」，但未直接关联file://的存储问题。 我找不到如何处理这个问题的官方文档，仅仅有其他的博客说需要增加http/https加载就没有这个问题。 请提供给我官方文档或者官方回复 关于出现这种file:/加载html出现问题的处理办法
Topic: Safari & Web SubTopic: General Tags:
2
0
567
Dec ’25
Detecting Navigation Redirect Chains
I'm building a macOS extension that needs to track multi-step navigation chains (A → B → C) to adjust behavior based on where users came from. Current approach: Using webNavigation.onBeforeNavigate to detect intermediate steps, but experiencing issues in Safari that don't occur on Chrome/Firefox/Edge. Questions: Is webNavigation the right API for tracking redirect chains in Safari? Does ITP/Private Browsing affect event delivery? Any alternative approaches recommended? (Safari version 26.0.1) Any guidance appreciated!
Topic: Safari & Web SubTopic: General Tags:
3
0
982
Dec ’25
WKBrowsingContextController is invalid
Is this code invalid on a phone running xcode16 iOS18? Class cls = NSClassFromString(@"WKBrowsingContextController"); SEL sel = NSSelectorFromString(@"registerSchemeForCustomProtocol:"); if ([(id)cls respondsToSelector:sel]) { [(id)cls performSelector:sel withObject:@"http"]; [(id)cls performSelector:sel withObject:@"https"]; } }
Topic: Safari & Web SubTopic: General
3
0
159
Jun ’25
iOS 26 WebKit Crash
Thread 0 Crashed: 0 WebKit 0x00000001a1b6bf1c WKMouseDeviceObserver.connectedDeviceCount.setter + 68 (WKMouseDeviceObserver.swift:0) 1 WebKit 0x00000001a1b6bea4 @objc WKMouseDeviceObserver.connectedDeviceCount.setter + 152 2 WebKit 0x00000001a1b6d95c closure #2 in WKMouseDeviceObserver.start() + 80 (WKMouseDeviceObserver.swift:0) 3 WebKit 0x00000001a1b4e3e9 &lt;deduplicated_symbol&gt; + 1 4 WebKit 0x00000001a1b4e139 &lt;deduplicated_symbol&gt; + 1 5 WebKit 0x00000001a1b4e769 &lt;deduplicated_symbol&gt; + 1 6 libswift_Concurrency.dylib 0x0000000196037cdd completeTaskWithClosure(swift::AsyncContext*, swift::SwiftError*) + 1 (Task.cpp:546)
Topic: Safari & Web SubTopic: General Tags:
1
0
800
Jul ’25
iOS 26.1 | WebKit renders an emoji for the list disclosure-closed icon
As of iOS 26.1, Safari and WebKit views have an issue when rendering the <details> html tag. The disclosure-closed icon / character appears as an emoji arrow ▶️ instead of the unicode character ▸ (U+25B8 - Black Right-Pointing Small Triangle) For example: <details> <summary>Summary</summary> <p>Additional details....</p> </details> This wasn't the case in iOS 26.0 / iOS 18. From what I can observe it seems ▶ (U+25B6 - Black Right-Pointing Triangle) may be used in iOS 26.1 which renders as the emoji ▶️ on iOS (at least as far back as iOS 18). The only workaround I found for the moment is to specify explicit CSS to revert back to using the ▸ (U+25B8 - Black Right-Pointing Small Triangle) details > summary { list-style-type: "▸ "; } details[open] > summary { list-style-type: "▾ "; } Is this expected? I've filed a feedback for this FB20997955. Thanks!
Topic: Safari & Web SubTopic: General Tags:
1
0
774
Dec ’25
WKNavigationAction.sourceFrame is nil on iOS 15.4 & 16.6 despite non-optional Swift declaration (fixed in iOS 18.6)
Reproducibility 100% on iOS 15.4 and iOS 16.6 Zero crash on iOS 18.6 Xcode 26.1 Steps to Reproduce Xcode 26.1 → New iOS App Replace ViewController.swift with the 20-line code below Run on real device • iPhone XR iOS 15.4 • iPhone 13 iOS 16.6 Tap the link → breakpoint in decidePolicyFor lldb → po navigationAction.sourceFrame Actual Result (lldb) po navigationAction.sourceFrame nil Swift declaration lies: public var sourceFrame: WKFrameInfo { get } // non-optional → Instant EXC_BREAKPOINT libswiftFoundation.dylib`URLRequest._unconditionallyBridgeFromObjectiveC Objective-C tells the truth: po [(WKNavigationAction *)navigationAction fixedSourceFrame] nil iOS 18.6 → same code prints a valid WKFrameInfo, no crash. Expected sourceFrame must be declared WKFrameInfo? in Swift or at least documented “can be nil on iOS 15–16”. Impact Every WKWebView app that touches sourceFrame on iOS 15.4 & 16.6 ships with a latent crash. Production Workaround @implementation WKNavigationAction (Safe) (WKFrameInfo *)fixedSourceFrame { return self.sourceFrame ? self.sourceFrame : nil; } @end Minimal Test (copy-paste) import UIKit import WebKit class ViewController: UIViewController, WKNavigationDelegate { lazy var web = WKWebView(frame: view.bounds) override func viewDidLoad() { super.viewDidLoad() web.navigationDelegate = self view.addSubview(web) web.load(URLRequest(url: URL(string: "https://www.apple.com")!)) } func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, preferences: WKWebpagePreferences, decisionHandler: @escaping (WKNavigationActionPolicy, WKWebpagePreferences)->Void) { print(navigationAction.sourceFrame) // ← crashes on 15.4 & 16.6 decisionHandler(.allow, preferences) } }
Topic: Safari & Web SubTopic: General Tags:
3
0
794
Nov ’25
Apple Pay Web: Multiple active PPCs for one Merchant ID?
Hi,
 We’re implementing Apple Pay on the Web for a multi-tenant platform via a PSP. The PSP operates multiple HSM/clusters and gave us multiple CSRs, asking us to register all.
Our understanding: a Merchant ID can hold several PPCs over time, but only one is active at once. Questions Is there any supported way to keep more than one PPC active simultaneously for the same Merchant ID? If not, what does Apple recommend for web-only, multi-tenant setups: a single MID with PSP-side decryption & sub-merchant separation, or separate MIDs per brand/region? Any official guidance on PPC rotation and handling many domains for Apple Pay on the Web? links to official docs or prior Apple responses would be appreciated.
Topic: Safari & Web SubTopic: General Tags:
Replies
1
Boosts
0
Views
891
Activity
Aug ’25
iOS 18.4 simulator doesn't show installed Safari Web Extensions
Even default Safari Web Extension project is not displayed on iOS 18.4 simulator ("No extensions installed"), so it's not possible to test extensions in simulator, only on real device.
Topic: Safari & Web SubTopic: General Tags:
Replies
2
Boosts
0
Views
225
Activity
Jun ’25
Does WKWebview support encrypted DNS when using Network.framework PrivacyContext Api?
After App uses Network.framework PrivacyContext Api, dns has been encrypted, that is good. But when using wkwebview to load web page, wireshark captures normal dns request sent by wkwebview. Does wkwebview use DoH to resolve domain? if can, how to config params? If can not, is there anyway to stop wkwebview sending normal dns, such as local proxy.
Topic: Safari & Web SubTopic: General Tags:
Replies
2
Boosts
0
Views
271
Activity
Jan ’26
header and footer positions shifted in Safari tab settings
Thank you for supporting me. My environment Device: iPhone 15 Pro OS: iOS 26.0 Public Beta (23A5336a) In iOS 26, three types of tabs were added to Safari. Depending on the option, the behavior of the fixed header and footer can be unstable. *Tab settings can be changed in the iOS Settings app under "Apps -> Safari" > "Tabs." The following behavior differs depending on the tab. Compact When scrolling down, the header and footer shift up by a few pixels. A margin is created between the footer and the URL input field. Bottom Behaves the same as "Compact." Top The header is completely hidden below the URL input field at the top of the screen, leaving a margin below the footer. Below is the sample code to check the operation. <!doctype html> <html lang="ja"> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width,initial-scale=1" /> <title>固定ヘッダー/フッター + モーダル</title> <style> :root { --header-h: 56px; --footer-h: 56px; } body { margin: 0; font-family: sans-serif; line-height: 1.6; background: #f9fafb; padding-top: var(--header-h); padding-bottom: var(--footer-h); } header .inner, footer .inner { width: 100%; max-width: var(--max-content-w); padding: 0 16px; display: flex; align-items: center; justify-content: space-between; } header, footer { position: fixed; left: 0; right: 0; display: flex; align-items: center; justify-content: center; z-index: 100; background: #fff; } header { top: 0; height: var(--header-h); border-bottom: 1px solid #ddd; } footer { bottom: 0; height: var(--footer-h); border-top: 1px solid #ddd; } main { padding: 16px; } .btn { padding: 8px 16px; border: 1px solid #2563eb; background: #2563eb; color: #fff; border-radius: 6px; cursor: pointer; } /* モーダル関連 */ .modal { position: fixed; inset: 0; display: none; z-index: 1000; } .modal.is-open { display: block; } .modal__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.5); } .modal__panel { position: relative; max-width: 600px; margin: 10% auto; background: #fff; border-radius: 8px; padding: 20px; z-index: 1; } .modal__head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; } .modal__title { margin: 0; font-size: 18px; font-weight: bold; } .modal__close { background: none; border: none; font-size: 20px; cursor: pointer; } </style> </head> <body> <header> <div class="inner"> <h1>デモページ</h1> <button id="openModal" class="btn">モーダルを開く</button> </div> </header> <main class="container" id="main"> <h2>スクロール用の適当なコンテンツ1</h2> <p>ヘッダーとフッターは常に表示されます。モーダルボタンを押すと、画面いっぱいのダイアログが開きます。</p> <!-- ダミーカードを複数 --> <section class="grid"> <div class="card"><strong>カード1</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード2</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード3</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード4</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード5</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード6</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード7</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード8</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード9</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> <div class="card"><strong>カード10</strong><p>適当なテキスト。適当なテキスト。適当なテキスト。</p></div> </section> </main> <footer> <small>&copy; 2025 Demo</small> </footer> <!-- モーダル --> <div class="modal" id="modal"> <div class="modal__backdrop"></div> <div class="modal__panel"> <div class="modal__head"> <h2 class="modal__title">モーダル</h2> <button class="modal__close" id="closeModal">&times;</button> </div> <p>これは白いビューのモーダルです。背景は黒く半透明で覆われています。</p> </div> </div> <script> const modal = document.getElementById('modal'); const openBtn = document.getElementById('openModal'); const closeBtn = document.getElementById('closeModal'); const backdrop = modal.querySelector('.modal__backdrop'); openBtn.addEventListener('click', () => { modal.classList.add('is-open'); }); function closeModal() { modal.classList.remove('is-open'); } closeBtn.addEventListener('click', closeModal); backdrop.addEventListener('click', closeModal); window.addEventListener('keydown', (e) => { if (e.key === 'Escape' && modal.classList.contains('is-open')) { closeModal(); } }); </script> </body> </html>
Topic: Safari & Web SubTopic: General Tags:
Replies
3
Boosts
0
Views
846
Activity
Sep ’25
WebView permission
Hi, I'm using a webview in Swift, where I load an html file locally. Basically I have an angular project built and loaded directly into my app bundle. The webview requires the use of the camera. I request permissions via and javascript, the pop-up appears, I accept the permissions and the app works correctly. Only that after a certain number of seconds, the permissions are requested again. It's as if the webview doesn't cache the accepted permissions. Is this normal behavior?
Topic: Safari & Web SubTopic: General Tags:
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1
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0
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225
Activity
May ’25
JavascriptCore crashes with pas_reallocation_did_fail
Hi, My app is using JavascriptCore to run the business logic in a javascript environment. We are randomly seeing crashes when users move the app back to the foreground. These crashes are reported by Firebase (I am attaching an example). I also tried to find them in Organizer, but the stacktraces don't match and I am not sure if they are pointing to the same error (I attach one just in case). I was trying to investigate a little bit about this, but I could find any explanation about what pas_reallocation_did_fail would mean. Here is our implementation: -(void) enqueueCallback:(JSValue *)callback withArguments:(NSArray *)args exclusive:(BOOL)exclusive { [self enqueueBlock:^{ @autoreleasepool { [callback callWithArguments:args]; } } exclusive:exclusive]; } Basically, every JS block is enqueued and then run by a dedicated thread specific to our JSContext. Can I get some help? Thanks in advance! Crashlytics.txt 2024-08-30_10-00-01.2572_-0400-f757f8306eda9679ec1b2ff90fbc66c4eb1fbee7.crash
Topic: Safari & Web SubTopic: General Tags:
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3
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0
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625
Activity
Jul ’25
Safari Technology Preview closes unexpectedly on external monitor
If the Safari Technology Preview window is located on an external monitor with DisplayLink and the computer goes to sleep (screen saver), when it returns, it closes with an error. If the window is located on another monitor that is connected by USB, it does not close. Equipo: Macbook Pro M4 Pro SO: MacOS Sequoia 15.6.1 Safari Technology Preview: Release 227 (preview version work fine) DisplayLink Manager: 13.0.1 (build 46)
Topic: Safari & Web SubTopic: General Tags:
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6
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0
Views
291
Activity
Sep ’25
Request for Native AJAX API Request Interception Support in WKWebView
Hello WebKit Team, I’m writing to ask if iOS provides a native way to intercept AJAX (XMLHttpRequest or fetch) calls inside WKWebView. On Android, this is handled via: shouldInterceptRequest(WebView view, WebResourceRequest request) but iOS currently seems to have no equivalent. We’ve tried: WKURLSchemeHandler → works only for custom schemes URLProtocol with WKProcessPool → unreliable for AJAX in WebView JavaScript injection → partial and unofficial Could you please clarify: Is there a recommended native approach to intercept AJAX requests? If not supported, is it planned for future releases? Any official workaround or guidance? This is critical for debugging, analytics, and compliance in hybrid apps.
Topic: Safari & Web SubTopic: General Tags:
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3
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0
Views
1k
Activity
Dec ’25
window.opener is null with WKWebview
My iOS app uses a WKWebView with a WKUIDelegate method (webView:createWebViewWithConfiguration:forNavigationAction:windowFeatures:) to handle popup windows. This works for most cases, but during OAuth flows on certain sites (e.g., canva.com), the popup WKWebView attempts to send results back to the main WKWebView using JavaScript like window.opener.postMessage(...). However, window.opener is always null in the popup, preventing the message from being posted and blocking login completion.I've researched this and found suggestions that it's by design, as WKWebView instances are isolated for security reasons. Has anyone encountered this and found a reliable workaround (e.g., bridging communication between the main and popup WKWebViews without relying on window.opener)?
Topic: Safari & Web SubTopic: General Tags:
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1
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0
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264
Activity
Dec ’25
pas_panic_on_out_of_memory_error crash on tvOS 15.4 and 15.4.1
Hi there, I'm experiencing several crashes on JavaScriptCore pas_panic_on_out_of_memory_error, only on devices with tvOS 15.4 and 15.4.1. This happens with users using the app for several hours as well as 5 seconds after launching the app. Devices: AppleTV6,2 and AppleTV5,3 Thread 14 — JavaScriptCore pas_panic_on_out_of_memory_error (JavaScriptCore) JavaScriptCore bmalloc_try_iso_allocate_impl_impl_slow (JavaScriptCore) JavaScriptCore bmalloc_heap_config_specialized_local_allocator_try_allocate_small_segregated_slow (JavaScriptCore) JavaScriptCore bmalloc_allocate_impl_casual_case (JavaScriptCore) JavaScriptCore ***::String::String(char16_t const*, unsigned int) (JavaScriptCore) JavaScriptCore JSC::LiteralParser<char16_t>::parsePrimitiveValue(JSC::VM&) (JavaScriptCore) JavaScriptCore JSC::LiteralParser<char16_t>::parse(JSC::ParserState) (JavaScriptCore) JavaScriptCore JSC::jsonProtoFuncParse(JSC::JSGlobalObject*, JSC::CallFrame*) (JavaScriptCore) JavaScriptCore llint_entry (JavaScriptCore) JavaScriptCore llint_entry (JavaScriptCore) JavaScriptCore llint_entry (JavaScriptCore) JavaScriptCore llint_entry (JavaScriptCore) JavaScriptCore vmEntryToJavaScript (JavaScriptCore) JavaScriptCore JSC::Interpreter::executeCall(JSC::JSGlobalObject*, JSC::JSObject*, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) (JavaScriptCore) JavaScriptCore JSC::boundThisNoArgsFunctionCall(JSC::JSGlobalObject*, JSC::CallFrame*) (JavaScriptCore) JavaScriptCore vmEntryToNative (JavaScriptCore) JavaScriptCore JSC::Interpreter::executeCall(JSC::JSGlobalObject*, JSC::JSObject*, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) (JavaScriptCore) JavaScriptCore JSC::profiledCall(JSC::JSGlobalObject*, JSC::ProfilingReason, JSC::JSValue, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) (JavaScriptCore) JavaScriptCore JSObjectCallAsFunction (JavaScriptCore) JavaScriptCore -[JSValue invokeMethod:withArguments:] (JavaScriptCore) ITMLKit -[IKJSObject invokeMethod:withArguments:] (ITMLKit) ITMLKit -[IKJSEventListenerObject invokeMethod:withArguments:thenDispatchEvent:extraInfo:] (ITMLKit) ITMLKit __43-[IKJSXMLHTTPRequest setRequestReadyState:]_block_invoke (ITMLKit) ITMLKit -[IKAppContext _doEvaluate:] (ITMLKit) ITMLKit -[IKAppContext _evaluate:] (ITMLKit) ITMLKit __41-[IKAppContext evaluate:completionBlock:]_block_invoke (ITMLKit) ITMLKit -[IKAppContext _sourcePerform] (ITMLKit) ITMLKit -[IKConcurrentEvaluator lockSchedulingForEvaluation:] (ITMLKit) ITMLKit IKRunLoopSourcePerformCallBack (ITMLKit) CoreFoundation __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ (CoreFoundation) CoreFoundation __CFRunLoopDoSource0 (CoreFoundation) CoreFoundation __CFRunLoopDoSources0 (CoreFoundation) CoreFoundation __CFRunLoopRun (CoreFoundation) CoreFoundation CFRunLoopRunSpecific (CoreFoundation) ITMLKit -[IKAppContext _jsThreadMain] (ITMLKit) Foundation __NSThread__start__ (Foundation) libsyste...ad.dylib _pthread_start (libsystem_pthread.dylib) libsyste...ad.dylib thread_start (libsystem_pthread.dylib) This issue seems very similar to this existing thread, although not sure its related
Topic: Safari & Web SubTopic: General Tags:
Replies
16
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0
Views
2.6k
Activity
Jul ’25
关于 WKWebView 加载本地文件时 localStorage 数据丢失的情况
在 iOS 平台使用 WKWebView 通过file://协议加载本地 HTML 文件时，存储在localStorage中的数据会在 App 后台切换、进程重启后偶尔丢失；但相同代码在安卓 / 鸿蒙平台无此问题。 现在的文档 仅明确了「默认数据存储（defaultDataStore）可将网站数据持久化到磁盘，非持久化存储（nonPersistent）仅存内存」的基础规则； 未提及「file://协议内容即使使用默认持久化存储，也会被归为临时内存存储」这一关键场景限制； 仅在WKURLSchemeHandler关联说明中隐含「自定义 URL 协议可处理 WebKit 原生不支持的 URL 方案」，但未直接关联file://的存储问题。 我找不到如何处理这个问题的官方文档，仅仅有其他的博客说需要增加http/https加载就没有这个问题。 请提供给我官方文档或者官方回复 关于出现这种file:/加载html出现问题的处理办法
Topic: Safari & Web SubTopic: General Tags:
Replies
2
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0
Views
567
Activity
Dec ’25
Detecting Navigation Redirect Chains
I'm building a macOS extension that needs to track multi-step navigation chains (A → B → C) to adjust behavior based on where users came from. Current approach: Using webNavigation.onBeforeNavigate to detect intermediate steps, but experiencing issues in Safari that don't occur on Chrome/Firefox/Edge. Questions: Is webNavigation the right API for tracking redirect chains in Safari? Does ITP/Private Browsing affect event delivery? Any alternative approaches recommended? (Safari version 26.0.1) Any guidance appreciated!
Topic: Safari & Web SubTopic: General Tags:
Replies
3
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0
Views
982
Activity
Dec ’25
WKBrowsingContextController is invalid
Is this code invalid on a phone running xcode16 iOS18? Class cls = NSClassFromString(@"WKBrowsingContextController"); SEL sel = NSSelectorFromString(@"registerSchemeForCustomProtocol:"); if ([(id)cls respondsToSelector:sel]) { [(id)cls performSelector:sel withObject:@"http"]; [(id)cls performSelector:sel withObject:@"https"]; } }
Topic: Safari & Web SubTopic: General
Replies
3
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0
Views
159
Activity
Jun ’25
Questions for App Clips experience, please help
Hi all , I have 2 questions regaridng App Clips. 1 - can we directly invoke App Clips from a HTML Appclip experience url ? We want to directly take users to the App Clips flow without showing App Clips cards or banner. 2 - Does Apple have a plan to support other modern mobile browsers such as Chrome , Edge and Firefox ?
Topic: Safari & Web SubTopic: General Tags:
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1
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0
Views
598
Activity
Jul ’25
iOS 26 WebKit Crash
Thread 0 Crashed: 0 WebKit 0x00000001a1b6bf1c WKMouseDeviceObserver.connectedDeviceCount.setter + 68 (WKMouseDeviceObserver.swift:0) 1 WebKit 0x00000001a1b6bea4 @objc WKMouseDeviceObserver.connectedDeviceCount.setter + 152 2 WebKit 0x00000001a1b6d95c closure #2 in WKMouseDeviceObserver.start() + 80 (WKMouseDeviceObserver.swift:0) 3 WebKit 0x00000001a1b4e3e9 &lt;deduplicated_symbol&gt; + 1 4 WebKit 0x00000001a1b4e139 &lt;deduplicated_symbol&gt; + 1 5 WebKit 0x00000001a1b4e769 &lt;deduplicated_symbol&gt; + 1 6 libswift_Concurrency.dylib 0x0000000196037cdd completeTaskWithClosure(swift::AsyncContext*, swift::SwiftError*) + 1 (Task.cpp:546)
Topic: Safari & Web SubTopic: General Tags:
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1
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0
Views
800
Activity
Jul ’25
iOS 26.1 | WebKit renders an emoji for the list disclosure-closed icon
As of iOS 26.1, Safari and WebKit views have an issue when rendering the <details> html tag. The disclosure-closed icon / character appears as an emoji arrow ▶️ instead of the unicode character ▸ (U+25B8 - Black Right-Pointing Small Triangle) For example: <details> <summary>Summary</summary> <p>Additional details....</p> </details> This wasn't the case in iOS 26.0 / iOS 18. From what I can observe it seems ▶ (U+25B6 - Black Right-Pointing Triangle) may be used in iOS 26.1 which renders as the emoji ▶️ on iOS (at least as far back as iOS 18). The only workaround I found for the moment is to specify explicit CSS to revert back to using the ▸ (U+25B8 - Black Right-Pointing Small Triangle) details > summary { list-style-type: "▸ "; } details[open] > summary { list-style-type: "▾ "; } Is this expected? I've filed a feedback for this FB20997955. Thanks!
Topic: Safari & Web SubTopic: General Tags:
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1
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0
Views
774
Activity
Dec ’25
WKNavigationAction.sourceFrame is nil on iOS 15.4 & 16.6 despite non-optional Swift declaration (fixed in iOS 18.6)
Reproducibility 100% on iOS 15.4 and iOS 16.6 Zero crash on iOS 18.6 Xcode 26.1 Steps to Reproduce Xcode 26.1 → New iOS App Replace ViewController.swift with the 20-line code below Run on real device • iPhone XR iOS 15.4 • iPhone 13 iOS 16.6 Tap the link → breakpoint in decidePolicyFor lldb → po navigationAction.sourceFrame Actual Result (lldb) po navigationAction.sourceFrame nil Swift declaration lies: public var sourceFrame: WKFrameInfo { get } // non-optional → Instant EXC_BREAKPOINT libswiftFoundation.dylib`URLRequest._unconditionallyBridgeFromObjectiveC Objective-C tells the truth: po [(WKNavigationAction *)navigationAction fixedSourceFrame] nil iOS 18.6 → same code prints a valid WKFrameInfo, no crash. Expected sourceFrame must be declared WKFrameInfo? in Swift or at least documented “can be nil on iOS 15–16”. Impact Every WKWebView app that touches sourceFrame on iOS 15.4 & 16.6 ships with a latent crash. Production Workaround @implementation WKNavigationAction (Safe) (WKFrameInfo *)fixedSourceFrame { return self.sourceFrame ? self.sourceFrame : nil; } @end Minimal Test (copy-paste) import UIKit import WebKit class ViewController: UIViewController, WKNavigationDelegate { lazy var web = WKWebView(frame: view.bounds) override func viewDidLoad() { super.viewDidLoad() web.navigationDelegate = self view.addSubview(web) web.load(URLRequest(url: URL(string: "https://www.apple.com")!)) } func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, preferences: WKWebpagePreferences, decisionHandler: @escaping (WKNavigationActionPolicy, WKWebpagePreferences)->Void) { print(navigationAction.sourceFrame) // ← crashes on 15.4 & 16.6 decisionHandler(.allow, preferences) } }
Topic: Safari & Web SubTopic: General Tags:
Replies
3
Boosts
0
Views
794
Activity
Nov ’25
Reading the status of Safari Web Extension from settings
Currently I am struggling to find a way to read the status of Safari Web Extension from settings as I can not find any public api listed for iOS as it is already available for macOS.
Topic: Safari & Web SubTopic: General Tags:
Replies
1
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0
Views
455
Activity
Nov ’25
Safari acting up
Safari is acting up. It’s appearing on my screen as a blank black screen, and then it’s retreating to the homepage.
Topic: Safari & Web SubTopic: General
Replies
1
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0
Views
248
Activity
Nov ’25
WebKit for SwiftUI: Observations
Is the new Observations API for WebPage not available in Beta 1 as demoed in the WWDC video? I get this error even though Observation is imported.
Topic: Safari & Web SubTopic: General Tags:
Replies
5
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0
Views
227
Activity
Jul ’25