fix: Avoid showing error page on cancelled navigation #1483
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Platforms affected
iOS
Motivation and Context
Closes GH-959.
Description
If the navigation was cancelled, don't show an error page. This can cause issues where a subsequent request never loads into the webview because the error page is being shown.
This was previously implemented back in the UIWebView days as CB-13222 in #334 and was then proposed in apache/cordova-plugin-wkwebview-engine#84 for the WKWebView plugin, but that didn't get reviewed/merged before the repo was archived. The fix is still valid, so we'll port it to the current version of the WKWebView plugin.
Testing
All existing tests passed.
Checklist