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| {{underscore|title=GM_log}}
| | As of Greasemonkey 4.0, this method has been removed. |
| __NOTOC__
| | You should use the [https://developer.mozilla.org/en-US/docs/Web/API/console.log console] instead. |
| {{Greasemonkey Manual TOC}}
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| == Description ==
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| This [[API_reference|API]] method allows script authors simple access to logging informational messages in the Error Console.
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| If you aren't seeing your messages, make sure you navigate to [[mozillazine:About:config|about:config]], and change the values of <code>javascript.options.showInConsole</code> and <code>javascript.options.strict</code> to true. This can be helpful for debugging.
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| [[#Examples|Examples]] | [[#GM_log_and_Firebug|GM_log and Firebug]] | [[#Notes|Notes]]
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| == Syntax ==
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| '''GM_log(''' ''message'' ''')'''
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| :Value: Function
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| :Returns: undefined
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| :Compatibility: [[Version_history#0.3_beta|Greasemonkey 0.3b+]]
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| :{| cellpadding="5" style="border-style:solid; background:#FFFFE0;"
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| |+ Parameters
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| !style="background:#CC9900;"|'''Properties'''
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| |-
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| | <code><span style="background:#FFFFE0;">[[#message |message]]</span></code>
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| |}
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| :* All properties are optional except [[#message|message]].
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| [[#top|top]]
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| === Properties ===
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| ----
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| ==== <code>message</code> ====
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| :Value: String, Integer<sup>[1]</sup> or Boolean<sup>[1]</sup>
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| :Usage: <code>'''message''' = "ARGHHH!";</code>
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| :* Message to send to the JavaScript error console.
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| :* <sup>[1]</sup> 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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| [[#top|top]] | [[#Syntax|back]]''
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| == Examples ==
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| {{Core samp |1=<pre style="border: none; margin: inherit;">
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| GM_log("Hello, World!");
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| </pre>}}
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| {{Core samp |1=<pre style="border: none; margin: inherit;">
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| GM_log("Warning, " + someInputField.value + "!");
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| </pre>}}
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| [[#top|top]]
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| == GM_log and Firebug ==
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| Since [https://addons.mozilla.org/en-US/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.
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| [[#top|top]]
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| == Notes ==
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| [[#top|top]]
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| [[Category:API_Reference|L]]
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As of Greasemonkey 4.0, this method has been removed.
You should use the console instead.
