Logging in React Native can be performed using several methods, each with its own advantages and use cases. Here are the primary ways to perform logging in React Native:
1. Using Built-in Console Methods
The simplest way to perform logging in React Native is by using the built-in console methods such as console.log, console.warn, and console.error. These methods are straightforward and useful for quick debugging during development.
console.log: Logs general information.
console.log("This is a log message");
console.warn: Logs warnings, typically displayed in a yellow box.
console.warn("This is a warning message");
console.error: Logs errors, typically displayed in a red box.
console.error("This is an error message");
2. Using React Native CLI Commands
For viewing logs in the terminal, you can use the React Native CLI commands:
For iOS:
npx react-native log-ios
For Android:
npx react-native log-android
These commands will display all logs, including those from console.log, console.warn, and console.error, in the terminal where the app is running[3][6].
3. Using react-native-logs Library
For more advanced logging, you can use the react-native-logs library, which provides additional features such as custom log levels, colored logs, and multiple transports (e.g., console, file, remote server).
Installation:
npm install --save react-native-logs
# or
yarn add react-native-logs
Basic Usage:
import { logger } from 'react-native-logs';
const log = logger.createLogger();
log.debug("This is a Debug log");
log.info("This is an Info log");
log.warn("This is a Warning log");
log.error("This is an Error log");
