react-native-vs-file-logger

Features

• Logs Recording: All console.log/debug/... calls are automatically tracked and logged in to files.
• View log files on UI: View the log files along with the contents on UI.
• Delete log files: Log Files can be easily deleted through UI.
• Email File sharing: Support for sharing files through email.
• File rolling: Support for time and size based file rolling, Max number of files (by default 3) and size-limit (by default 1MB) can be configured.

Prerequisites:-

• Following npm packages should be in your project with their required setup
  1. react-native-file-logger
  2. react-native-fs
  3. react-native-share
  4. react-native-vector-icons

Installation

npm i react-native-vs-file-logger

Usage

Configuring logger

• Wrap your component by ConfigProvider and pass configure options to it as props.

Configure options

Option	Type	Default value	Description
captureConsole	boolean	true	It is an optional prop which specifies whether console calls should be automatically captured and written to a log file.
dailyRolling	boolean	true	It is an optional prop which specifies whether a new log file should be created every day.
formatter	(level : LogLevel, message : string) => string	date--time--[level]: message	It is a optional prop which specifies a function that takes the log level and message and returns the formatted string to write to the log file.
logLevel	LogLevel	LogLevel.Debug	It is an optional prop which specifies minimum log level for file output (it won't affect console output).
logsDirectory	string	undefined	It is an optional prop which specifies the absolute path of directory where log files are stored. If not defined, log files are stored in the cache directory of the app.
maximumFileSize	number	1024 * 1024 (1 MB)	It is an optional prop which specifies the maximum size of log files. Specify maximumFileSize = 0 to disable.
maximumNumberOfFiles	number	3	It is an optional prop which specifies the maximum number of log files. If the total number of files exceeds this limit, the oldest file is deleted. Specify maximumNumberOfFiles = 0 to disable.

import { ConfigProvider } from 'react-native-vs-file-logger'

import Home from './Home'

const App = () => {
  const options = {
    dailyRolling: false,
    maximumFileSize: 1024 * 1024, // 1 MB,
    maximumNumberOfFiles: 10,
  }

  return (
    <ConfigProvider options={options}>
      <Home />
    </ConfigProvider>
  )
}

export default App

Log capturing

• Use console Api's such as console.log , console.error, console.warn etc. which are automatically captured and stored in log files.

• In addition to console Api's, below defined FileLogger API's can also be used.

FileLogger.debug(msg)

Shortcut for FileLogger.write(LogLevel.Debug, msg).

FileLogger.info(msg)

Shortcut for FileLogger.write(LogLevel.Info, msg).

FileLogger.warn(msg)

Shortcut for FileLogger.write(LogLevel.Warning, msg).

FileLogger.error(msg)

Shortcut for FileLogger.write(LogLevel.Error, msg).

FileLogger.write(level, msg)

Append the given message to the log file with the specified log level.

Read more about it here - react-native-file-logger

Example -

import { FileLogger } from 'react-native-vs-file-logger'

const Home = () => {
  console.log('Sample log using console API')

  FileLogger.info('Sample log using FileLogger API')

  return <Text>List of Log Files</Text>
}

export default Home

Render logs files and view its content

• Just import and use LogList component anywhere in your project to render all logs on UI.

import { LogList } from 'react-native-vs-file-logger'

const Home = () => {
  return (
    <View>
      <Text>List of Log Files</Text>
      <LogList />
    </View>
  )
}

export default Home