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README.md

dbug - a console wrapper

dbug is a wrapper for the firebug console plugin for firefox. The syntax for logging is the same as documented at http://getfirebug.com.

Screenshot

Requirements

  • none

How to use

You can leave dbug.log() statements in your code and they will not be echoed out to the screen in any way.

Enabling dbug {#dbug:enable}

To display the dbug statements, you have two options: include "jsdebug=true" in the query string of the page and all your dbug statements will be printed as they occur OR type into the firebug console dbug.enable() and the debug statements that have occurred up until that point will be echoed, and all others from that point will be printed as they occur. You can also put dbug.enable() in your page's javascript to turn it on.

Disabling dbug {#dbug:disable}

dbug.disable() will turn it back off.

dbug Properties {#dbug:properties}

  • logged - (array) the messages logged previously if dbug is not enabled. When dbug.enable is invoked, all logged messages are dumped to the console
  • firebug - (boolean) true if firebug (or Moobugger) is present; if false, dbug.enable will not have any effect
  • debug - (boolean) true if debugging is enabled

dbug Method: log {#dbug:log}

Sends a message to the console if dbug is enabled, otherwise it stores this info until dbug is enabled.

Syntax

dbug.log(msg[, msg2, msg3, etc]);

Arguments

  1. (mixed) collection of messages to log to the console. You may pass as many as you like.

Messages

Messages sent to dbug methods can contain various substitutions. See http://getfirebug.com.

Examples

dbug.log("message");
> message
dbug.log("my var is %s", myVar);
> my var is x
dbug.log($('myelement'));
> <div id="myelement"></div>
dbug.log("myelement: %s, some value: %s", $('myelement'), somevalue);
> myelement: <div id="myelement"></div>, some value: blah

dbug Method: cookie {#dbug:cookie}

Turns debugging on for the rest of the day for that domain. This lets you click around without having to add jsdebug=true to each new page's url and reload the page or execute dbug.enable every time.

Calling dbug.cookie() when the cookie is already present will disable it (toggle).

Syntax

dbug.cookie(set);

Arguments

  • set - (boolean, optional) if true sets the cookie even if it's already set (overrides toggle), if false overrides to disable the cookie (same as dbug:disableCookie);

Examples

dbug.cookie(); //toggles debugging state for the current browser session
dbug.cookie(true); //forces debug cookie to be set, overriding toggle

dbug Method: disableCookie {#dbug:disableCookie}

This removes the cookie set by dbug:cookie and turns off debugging for subsequent page loads.

Syntax

dbug.disableCookie(); //cookie is disabled

Additional dbug Methods

See http://www.getfirebug.com/console.html for all the methods that Firebug supports. Each of these methods will be passed through to the console so any of them will work against dbug, just as if you had called them against console.

Examples

dbug.time(); //same as console.time()
dbug.timeEnd(); //same as console.timeEnd()
dbug.trace(); //same as console.trace();
dbug.dir(obj); //same as console.dir(obj);
//etc

Script: dbugScripts.js {#dbugScripts-js}

This stand-alone script allows you to debug against a live environment by discarding the live version of a library (typically compressed with no line breaks or comments) in exchange for a non-live one (typically uncompressed). This provides two primary benefits:

  1. you can test against an environment using a non-compressed version of the library
  2. you can test against an environment without changing it (i.e. test against a live environment with non-production ready code)

This is the entirety of the method:

function dbugScripts(baseurl,libs){
	var value = document.cookie.match('(?:^|;)\\s*jsdebug=([^;]*)');
	var debugCookie = value ? unescape(value[1]) : false;
	if(window.location.href.indexOf("basePath=this")>0){
		var path=baseurl.substring(baseurl.substring(7,baseurl.length).indexOf("/")+8,baseurl.length);
		var href=window.location.href;
		baseurl=href.substring(href.substring(7,href.length).indexOf("/")+8,href.length);
	}
	if(window.location.href.indexOf("jsdebug=true")>0 || window.location.href.indexOf("jsdebugCookie=true")>0 || debugCookie == 'true'){ 
		if (libs) {
			for(var i=0;i<libs.length;i++){
				document.write("<scri"+"pt src=\""+baseurl+libs[i]+"\" type=\"text/javascript\"></sc"+"ript>");
			}
		} else {
			document.write("<scri"+"pt src=\""+baseurl+"\" type=\"text/javascript\"></scr"+"ipt>");
		}
		return true;
	}
	return false;
};

Tutorial/Demo

Function: dbugScripts {#dbugScripts}

Syntax

if(!dbugScripts(baseHref[, scripts]) {
	//...compressed code
}

Arguments

  1. baseHref - (string) the url to the common directory containing all the compressed scripts OR the url to a single js file
  2. libs - (array, optional) a list of file locations relative to the baseHref to each of the files contained in the library

Details

If you include this method at the top of your first library you then can wrap your compressed library with a conditional for debugging:

if (!dbugScritps("http://test.foo.com", ["library.js", "library2.js"]) {
	//...compressed library.js goes here
	//...compressed library2.js goes here
}

If your compressed document only includes one file, you don't have to use the second argumnet:

if (!dbugScripts("http://test.foo.com/foo.js")) {
	//...compressed foo.js goes here
}

Then, using the enabling methods described in dbug.js above (see dbug:enable & dbug:cookie) you can switch between the uncompressed library and the compressed (live) one.