[Webkit-unassigned] [Bug 205158] New: Double tap to zoom doesn't work after upgrading to iOS 13

Thu Dec 12 05:11:31 PST 2019

https://bugs.webkit.org/show_bug.cgi?id=205158

            Bug ID: 205158
           Summary: Double tap to zoom doesn't work after upgrading to iOS
                    13
           Product: WebKit
           Version: Other
          Hardware: iPhone / iPad
                OS: iOS 13
            Status: NEW
          Severity: Major
          Priority: P2
         Component: UI Events
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ruich at microsoft.com

We use WKWebView as browser in our App.

The problem is that double tap to zoom doesn't work when we add a click event listener after upgrading to iOS 13.

You could double tap the text on this page(http://www.kappabashi.or.jp/en/) to repro. And below is also a minimum web page can repro.

    <!DOCTYPE html>
        <html lang="en">
            <head>
                <meta charset="UTF-8">
                <meta name="viewport" content="width=device-width, initial-scale=1.0">
                <meta http-equiv="X-UA-Compatible" content="ie=edge">
                <title>Document</title>
            <style>
                p {
                    width: 50px;
                    height: 200px;
                }
            </style>
        </head>
        <body> 
            <p class="text">Kappabashi Dougu Street is located in Tokyo's Taito City, along the west side of Asakusa's main entertainment district, and just midway between Ueno and Asakusa.<br> Merchants first began gathering in the Kappabashi area around 1912, selling old tools and a wide range of implements and hardware. Today, one can find almost every kind of restaurant equipment imaginable, including bakery equipment, Japanese, Western, and Chinese tableware, china, laquerware, restaurant equipment, packaging, containers, decorative goods, "fake" food samples, chefs' coats, signs, noren (shop curtains), bamboo wares, baking ingredients, food and beverage ingredients, confectionary wholesalers, Japanese furniture, Western furniture, kitchen equipment, refrigerators and refrigerated showcases, showcases, displays, shop design and construction services, and much more. At 800 meters (nearly a half-mile) in length, and with over 170 shops, this is Japan’s largest shopping street devoted to kitchen implements.</p>
            <script>
                document.addEventListener('click', (e) => {
                }, false);
            </script>
        </body>
    </html>

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