{"id":6159,"date":"2013-03-27T16:11:46","date_gmt":"2013-03-27T23:11:46","guid":{"rendered":"http:\/\/blog.mozilla.org\/addons\/?p=6159"},"modified":"2013-03-27T16:11:46","modified_gmt":"2013-03-27T23:11:46","slug":"changes-to-console-log-behaviour-in-sdk-1-14","status":"publish","type":"post","link":"https:\/\/blog.mozilla.org\/addons\/2013\/03\/27\/changes-to-console-log-behaviour-in-sdk-1-14\/","title":{"rendered":"Changes to console.log behaviour in SDK 1.14"},"content":{"rendered":"

One change in SDK 1.14 that has already surprised some people<\/a> in the community is a change in the visibility of messages printed from console.log<\/a>.<\/p>\n

In 1.14 we added some additional features to the console API and also set the default log level to “error” instead of “info” for add-ons installed into Firefox via the Add-on Manager and Add-on Builder Helper as well as tools like the Extension Auto-installer<\/a>.<\/p>\n

An unfortunate side-effect is that\u00a0by default, developers using these tools will no longer see messages from console.log()<\/code> in the jsconsole window<\/a>.<\/p>\n

We have provided the ability for developers to set preferences to control logging behavior both globally and for a specific add-on, and by setting one of these preferences you can override the default.<\/p>\n

Logging levels<\/h3>\n

The console module<\/a> now defines a range of logging levels:<\/p>\n

    \n
  1. all<\/strong>: log calls to any console<\/code> method<\/li>\n
  2. debug<\/strong>: log calls to debug()<\/code>, log()<\/code>, info()<\/code>, warn()<\/code>, error()<\/code><\/li>\n
  3. info<\/strong>: log calls to log()<\/code>, info()<\/code>, warn()<\/code>, error()<\/code><\/li>\n
  4. warn<\/strong>: log calls to warn()<\/code> and error()<\/code><\/li>\n
  5. error<\/strong>: log calls to error()<\/code><\/li>\n
  6. off<\/strong>: log nothing<\/li>\n<\/ol>\n

    New Preferences<\/h3>\n

    We have defined two new preferences, which set the logging level either globally for all SDK add-ons, or for a specific SDK add-on:<\/p>\n

    extensions.sdk.console.logLevel<\/em><\/strong>: this preference can be added to about:config to change the logging level of all<\/em> installed SDK-based add-ons.<\/p>\n

    extensions.[extension-id].sdk.console.logLevel<\/em><\/strong>: this preference can be added to about:config to change the logging level of a specific add-on. This preference overrides the global preference.<\/p>\n

    The value for each preference is the desired logging level, given as a string. If neither preference is set, the logging level defaults to “error”.<\/p>\n

    Restoring the old behavior<\/h3>\n

    If you want to restore the previous behavior in which console.log messages are visible in the error log, please do the following:<\/p>\n

      \n
    1. open about:config<\/li>\n
    2. right-click and select New -> String<\/li>\n
    3. for the preference name, enter ‘extensions.sdk.console.logLevel’<\/li>\n
    4. for the preference value, enter ‘all’<\/li>\n
    5. restart Firefox<\/li>\n<\/ol>\n

      Here is a screenshot of what the result should look like:<\/p>\n

      \"about_config\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

      One change in SDK 1.14 that has already surprised some people in the community is a change in the visibility of messages printed from console.log. In 1.14 we added some … Read more<\/a><\/p>\n","protected":false},"author":316,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7117,44,121,588,742],"tags":[],"yoast_head":"\nChanges to console.log behaviour in SDK 1.14 - Mozilla Add-ons Community Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.mozilla.org\/addons\/2013\/03\/27\/changes-to-console-log-behaviour-in-sdk-1-14\/\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jeff Griffiths\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.mozilla.org\/addons\/2013\/03\/27\/changes-to-console-log-behaviour-in-sdk-1-14\/\",\"url\":\"https:\/\/blog.mozilla.org\/addons\/2013\/03\/27\/changes-to-console-log-behaviour-in-sdk-1-14\/\",\"name\":\"Changes to console.log behaviour in SDK 1.14 - 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