Bragi是一個獨立，先進的 NodeJS日志框架。可以為輸入的日志信息著色，定義日志級別和服務器報告功能。Bragi能夠讓你在代碼中編寫日志信息，并指定哪些日志輸出到控制臺中。

安裝和用法

$ npm install bragi

Then, include it in your code:

var logger = require('bragi'); 

Next, log something:

logger.log('groupname', 'Hello world'); 

Calls to log take in two required parameters: groupName and message. Any additional parameters (such as object info) will be included in the log message also. For instance:

logger.log('groupname', 'Here is some user info', { name: 'Ironman', weaknesses: null }); 

One of the benefits Bragi provides is the ability to supply arbitrary group names and namespace for groups (separated by a colon). For instance:

logger.log('userController:fetchInfo', 'fetching user information...'); 

Because the groupname is a string, you can dynamically create it:

logger.log('userController:fetchInfo:ironman', 'fetching user information...'); 

With group names, we're able to filter messages by groups and their namespaces, or by a regular expression (e.g., we have the ability to show ALL logs for the ironman user)

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