JavaScript debugging techniques


	JavaScript debugging techniques

prostoalex

4-4-2008 7:03 PM

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/2cfb818e-6b98-4b17-91a6-cdc146527763/F9622A2C-5489-444E-9E16-3EB9B018D51B/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.sitepen.com/blog/2008/04/03/advanced-javascript-debugging-techniques/" href="http://www.sitepen.com/blog/2008/04/03/advanced-javascript-debugging-techniques/" style="font-size: 11px;">www.sitepen.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sitepen.com/blog/2008/04/03/advanced-javascript-debugging-techniques/"><P><STRONG>Step-Wise Debugging</STRONG> - For logic errors, there’s sometimes no substitute for peppering break points around likely-looking places, and walking through line-by-line, function by function—in Firebug/Venkman/MSE/Visual Studio—all of which support stepwise debugging.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sitepen.com/blog/2008/04/03/advanced-javascript-debugging-techniques/"><P><STRONG>Expressions Testing</STRONG> - Use the console command line to directly test your expressions. This example pulls names out of email contacts:</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sitepen.com/blog/2008/04/03/advanced-javascript-debugging-techniques/"><P><STRONG>Firebug Lite</STRONG> - <A href="http://www.getfirebug.com/lite.html">Firebug Lite</A> works in IE and other browsers, and if you’re using the Dojo Toolkit it comes included, with some enhancements like launching in a separate window, and an object inspector. And of course there’s <A href="http://www.getfirebug.com/#install">Firebug</A> itself, but you knew that.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sitepen.com/blog/2008/04/03/advanced-javascript-debugging-techniques/"><P><STRONG>Internet Explorer Developer Toolbar</STRONG> - Microsoft’s <A href="http://www.microsoft.com/downloads/details.aspx?familyid=e59c3964-672d-4511-bb3e-2d5e1db91038&displaylang=en">Internet Explorer Developer Toolbar</A> is certainly an improvement over what it had before. A lot of inspectors and shortcuts to useful features like cache clearing (which now takes two clicks instead four).</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/F9622A2C-5489-444E-9E16-3EB9B018D51B/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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