onerror

Here's an answer for a similar question in Objective C but I'm not sure what's the right way to translate it to MonoTouch. Basically, I want to be able to catch JavaScript errors and know at least filename and line number—unfortunately, window.onerror doesn't give this crucial information. In particular, I'm not sure if I should expose a native library or if I can write this in pure MonoTouch. Dan Abramov I adopted Pablo's UIWebView+Debug category inspired by Robert Sanders and Kresimir Prcela's answers . Note that his code also includes a private API call you can use to enable remote web

I want to use onerror to intercept and log all errors that occur in my JavaScript application. This works as expected except when using promises or async functions. In the following snipped the exception thrown by fail is intercepted as expected but rejectPromise and throwAsync instead of invoking the onerror handler always show an Uncaught (in promise) Error in the console? How can I always intercept all errors in a code base that uses promises and async functions? window.onerror = function(message, source, lineno, colno, error) { console.log('onerror handler logging error', message); return

I have some images on my page: <img src="http://www.abc/images/abc.jpg" /> If the image can't be loaded (because abc.jpg doesn't exist, for example), then I show a "default" image instead: <img src="http://www.abc/images/abc.jpg" onerror="this.src='http://www.abc/images/default.jpg'" /> If I add LazyLoad to my image and load an even more lightweight default image, it becomes: <img class="lazy" data-original="http://www.abc/images/abc.jpg" src="http://www.abc/images/graydefault.jpg" onerror="this.src='http://www.abc/images/default.jpg'" /> Now, when the page loads, it will first load the

I'm writing an application in JavaScript that should create a new image. Sometimes it fails. I was able to detect the times when it does by attaching an image.onerror event listener. Question is: How may I learn what error occured - what parameters does the error object for images bring? So far I only found out that image.onerror = function (errorMsg, url, lineNumber, column, errorObj) { console.log('Error: ' + errorMsg + ' Script: ' + url + ' Line: ' + lineNumber + ' Column: ' + column + ' StackTrace: ' + errorObj); } which I got from: javascript: how to display script errors in a popup alert