GM log: Difference between revisions

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== GM_log and Firebug ==
== GM_log and Firebug ==
Since [https://addons.mozilla.org/firefox/addon/1843 Firebug] 1.0, <code>extensions.firebug.showChromeMessages</code> must be set to <code>true</code> for GM_log messages to show up in the Firebug console.
Since [https://addons.mozilla.org/firefox/addon/1843 Firebug] 1.0, <code>extensions.firebug.showChromeMessages</code> must be set to <code>true</code> for GM_log messages to show up in the Firebug console.
It is also recommended to enable <code>extensions.firebug.showChromeErrors</code>, as doing so will reveal syntax errors and script breaks.
This can be done from <code>about:config</code>, or from the Firebug GUI. Go to the "Console" tab, then click the arrow next to the tab's name, and ensure that "Show Chrome Errors" and "Show Chrome Messages" are checked.


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Revision as of 15:12, 1 September 2009

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Greasemonkey Manual
Using Greasemonkey
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Environment
API

Description

This API method allows script authors simple access to logging informational messages in the Error Console.

If you aren't seeing your messages, make sure you navigate to about:config, and change the values of javascript.options.showInConsole and javascript.options.strict to true. This can be helpful for debugging.

Examples | GM_log and Firebug | Notes

Syntax

GM_log( message )

Value: Function
Returns: undefined
Compatibility: Greasemonkey 0.3b+
Parameters
Properties
message
  • All properties are optional except message.

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Properties


message

Value: String, Integer[1] or Boolean[1]
Usage: message = "ARGHHH!";
  • Message to send to the JavaScript error console.
  • [1] While the value may be a non-string, it will convert the argument to a string. There may also be some instances of visual clipping on large numerical values during conversion. This is a feature present in Mozilla based JavaScript console logging.

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Examples

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GM_log and Firebug

Since Firebug 1.0, extensions.firebug.showChromeMessages must be set to true for GM_log messages to show up in the Firebug console.

It is also recommended to enable extensions.firebug.showChromeErrors, as doing so will reveal syntax errors and script breaks.

This can be done from about:config, or from the Firebug GUI. Go to the "Console" tab, then click the arrow next to the tab's name, and ensure that "Show Chrome Errors" and "Show Chrome Messages" are checked.

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Notes

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