The more javascript code is produced in SharePoint solutions, the more need we have to log information and possible errors to a central logging place in SharePoint: ULS. This blog post is about logging to ULS from javascript. For a while ago I read a blog post: 5 suggestions to implement a better logging in SharePoint The author @avishnyakov mentions the ability log to ULS from javascript. I want to dive deeper.

If you want to reset all interval jobs when a browser tab is inactive, the best way would be to use clearInterval on window blur. But unfortunately Chrome fires window focus and window blur two times. Here is an embryo to a solution: var M = window.M || {}; M.counter = 0; M.focused = true; M.tick = function() { if (M.focused) { console.log("tic tac " + ++M.counter); } }; M.start = function(e) { console.

console.log is the best tool for debugging javascript. In Firefox Firebug and Chrome Dev Tools you can even log objects which are represented as tree nodes of properties. If Firebug or Dev Tools in Chrome and IE9 are not opened, all these messages are ignored. But IE8 doesn’t understand console (if Dev Tools are closed) and raises an error: To avoid these errors, just declare an empty function just for IE8–:

Recently I talked about a WithWeb-pattern as described in Jonas Nilssons blog where you can isolate the disposal logic in one place. Another thing is to isolate unsafe updates: public static class SPWebExtension { public static void UnsafeUpdate(this SPWeb web, Action<SPWeb> action) { try { Log.Info("Trying to do an unsafe update on a web: " + web.Title); web.AllowUnsafeUpdates = true; action(web); } catch (Exception e) { Log.Error(e); } finally { web.

Do an unsafe update in a unified manner « Sharepoint. Kunskap. Upptäckter på resan. - Sep 3, 2011 […] Log class is my own class which I presented in my previous post. Like this:GillaBli först att gilla denna […]

Here is a simple log which has been inspired of Android Log. It logs to ULS which you can open with ULSViewer, SharePoint Log Viewer. using System; using Microsoft.SharePoint.Administration; namespace Contoso.Intranet.Portal.Utilities { public class Log { private static readonly string \_CATEGORYNAME = "CONTOSO"; private static readonly SPDiagnosticsCategory \_ERROR\_CATEGORY = new SPDiagnosticsCategory(\_CATEGORYNAME, TraceSeverity.Unexpected, EventSeverity.Error); private static readonly SPDiagnosticsCategory \_WARNING\_CATEGORY = new SPDiagnosticsCategory(\_CATEGORYNAME, TraceSeverity.High, EventSeverity.Warning); private static readonly SPDiagnosticsCategory \_VERBOSE\_CATEGORY = new SPDiagnosticsCategory(\_CATEGORYNAME, TraceSeverity.

Det finns ett intressant projekt på codeplex: ULS Logger. Är absolut värt att testa.

Mycket bra verktyg för att debugga din sharepoint applikation är Sharepoint Log Viewer som är Open Source och finns att hämta på codeplex.com Det går att öppna en logg-fil, det går att köra live monitoring och att exportera. Det sköna är att det är lätt att söka efter correlations-id. Rekommenderar verktyget! Comments from Wordpress.com Sharepoint + OpenSource = Sant « Sharepoint. Kunskap. Upptäckter på resan. - Mar 3, 2011 […] får man 729 projekt som är alltså öppna.