Sends log events to a slack channel. This is an optional appender for use with log4js.

npm install @log4js-node/slack

• type - @log4js-node/slack
• token - string - your Slack API token (see the slack and slack-node docs)
• channel_id - string - the channel to send log messages
• icon_url - string (optional) - the icon to use for the message
• username - string - the username to display with the message
• layout - object (optional, defaults to basicLayout) - the layout to use for the message (see layouts).

log4js.configure({
 appenders: {
 alerts: {
 type: '@log4js-node/slack',
 token: 'abc123def',
 channel_id: 'prod-alerts',
 username: 'our_application'
 }
 },
 categories: {
 default: { appenders: ['alerts'], level: 'error' }
 }
});

This configuration will send all error (and above) messages to the prod-alerts slack channel, with the username our_application.