MediaWiki:Gadget-ShowJavascriptErrors.js
Note: After publishing, you may have to bypass your browser's cache to see the changes.
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// This only shows alerts for things after this handler is installed of course.
// Because this is a gadget, error reporting can thus be inconsistent.
var originalErrorHandler = window.onerror || null;
// Column and error args are optional
window.onerror = function ( message, url, line, colomn, error ) {
var $msg = $( '<p>' );
if ( url ) {
$( '<span>' )
.text( url + ' at line ' + line + ': ' )
.appendTo( $msg );
}
$( '<span>' )
.text( message )
.appendTo( $msg );
mw.notify( $msg, {
autoHide: true,
autoHideSeconds: 10,
tag: null,
title: 'Javascript Error',
type: 'error'
} );
if (originalErrorHandler) {
return originalErrorHandler.apply(this, arguments);
}
};
// unbind on leaving the page
$( window )
.on( 'unload', function () {
window.onerror = originalErrorHandler;
} );