Filip Němeček • 5/22/2020

Using WKWebView in headless mode

This technical article addresses a common pitfall when using WKWebView in headless (background) mode in iOS. It explains that WKWebView optimizes resource usage when not attached to a visible view hierarchy, which can break JavaScript execution. The solution provided is to instantiate the WKWebView with a zero-size frame and add it as a subview to the app's main window, ensuring it behaves correctly. It also notes a relevant change for multi-window support starting in iOS 13.

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#JavaScript #Io #Swift