Console Logger

AWS Amplify writes console logs through Logger. You can use Logger in your apps for the same purpose.

Installation

Import Logger:

1import { Logger } from 'aws-amplify';

Working with the API

You can call logger for different console message modes:

1const logger = new Logger('foo');
2
3logger.info('info bar');
4logger.debug('debug bar');
5logger.warn('warn bar');
6logger.error('error bar');

When handling an error:

1try {
2    // ...
3} catch(e) {
4    logger.error('error happened', e);
5}

Setting Logging Levels

You can set a log level when you create your logger instance:

1const logger = new Logger('foo', 'INFO');
2
3logger.debug('callback data', data); // this will not write the message

Global logger configuration will override your logger instance's configuration:

1Amplify.Logger.LOG_LEVEL = 'DEBUG';
2
3const logger = new Logger('foo', 'INFO');
4
5logger.debug('callback data', data); //  this will write the message since the global log level is 'DEBUG'

During web development, you can set global log level in browser console log:

1window.LOG_LEVEL = 'DEBUG';

Supported log levels:

ERROR
WARN
INFO
DEBUG
VERBOSE