Console.log in Dart Language
ConsoleDartConsole Problem Overview
How can I log into the browser console, like console.log
in JavaScript, from the Dart language?
Console Solutions
Solution 1 - Console
Simple:
print('This will be logged to the console in the browser.');
A basic top-level print
function is always available in all implementations of Dart (browser, VM, etc.). Because Dart has string interpolation, it's easy to use that to print useful stuff too:
var a = 123;
var b = Point(2, 3);
print('a is $a, b is ${b.x}, ${b.y}');
Solution 2 - Console
Also, dart:html
allows use of window.console
object.
import 'dart:html';
void main() {
window.console.debug("debug message");
window.console.info("info message");
window.console.error("error message");
}
Solution 3 - Console
It’s easy! Just import the logging package:
import 'package:logging/logging.dart';
Create a logger object:
final _logger = Logger('YourClassName');
Then in your code when you need to log something:
_logger.info('Request received!');
If you catch an exception you can log it and the stacktrace as well.
_logger.severe('Oops, an error occurred', err, stacktrace);
Logging package documentation : https://github.com/dart-lang/logging
Solution 4 - Console
Simple:
print("hello word");
or
debugPrint(" hello word);
Solution 5 - Console
When you use only Dart without Flutter, then this is a good and easy solution:
void log(var logstr) {
stdout.writeln("-> " + logstr.toString());
}