Debugging client-side ASP.NET validators

I used this JavaScript snippet to debug an ASP.NET page that was swallowing client-side validation errors (in an UpdatePanel *gag*). I would click a button to submit a form, and nothing would happen – no visual indication of which validators were failing – so I opened the Chrome console and quickly iterated through the validators to locate the offender. [js] for(var i in Page_Validators) { var v = Page_Validators[i]; if(v.isvalid) { continue; } console.log(; } [/js] If you want it on one line (easy to paste into Chrome), refer to my github gist. If you want to read more about ASP.NET client-side validators (I dunno, maybe you have insomnia), check out the official MSDN documentation.