TrackJS on Mythryl: “Safari throwing “undefined is not an object (evaluating…”

Safari throwing “undefined is not an object (evaluating 'window.webkit.messageHandlers')”? It’s not random. It’s WKWebView doing WKWebView things. What it means, why it happens, and how to fix it: trackjs.com/javascript-e... #javascript #safari

trackjs.comHow to fix `undefined is not an object (evaluating 'window.webkit.messageHandlers')`Safari throws this when JavaScript tries to call the WKWebView native bridge, but the page is running in a normal browser context where `window.webkit.messageHandlers` doesn't exist. Fix it with featu...

3/2/26, 8:29 pm0 reposts1 like

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