19819 2012-11-01 15:43:22 +0000 The last 3 parameters to OnErrorEventHandlerNonNull should be optional 2013-01-31 00:19:02 +0000 1 1 1 Unclassified WHATWG HTML unspecified PC Linux RESOLVED FIXED P2 normal Unsorted 1 bugs ian bzbarsky ian mike contributor oldest_to_newest 77679 0 bugs 2012-11-01 15:43:22 +0000 Currently the spec has callback OnErrorEventHandlerNonNull = any ((Event or DOMString) event, DOMString source, unsigned long lineno, unsigned long column); But in practice the latter 3 params are used only for script errors. 77680 1 bugs 2012-11-01 15:44:37 +0000 See also http://lists.w3.org/Archives/Public/public-script-coord/2012OctDec/0117.html 77719 2 ian 2012-11-01 22:40:27 +0000 Can you elaborate? Wouldn't the last three be undefined if the callback was invoked with just one argument? Or is this just editorial? 77730 3 bzbarsky 2012-11-02 01:06:05 +0000 Ian, the callback cannot be invoked with just one argument per WebIDL given how the IDL is written for it right now, as far as I can see. It must be invoked with 4 arguments. 82383 4 ian 2013-01-31 00:19:02 +0000 r7678