Timestamped Console

Returns a new console class adding a timestamp to the beginning of each line. Does not patch any existing console, but modify the console's output streams. Written for node.js in ES2015.

Usage

Call the factory function returned by require with your preferred timestamp format. You can use your console locally as console without changing the global console object for other modules. The console's internals have not been changed, any method will work as expected.

// get new console
const console = require( 'timestamped-console' )( 'yyyy-mm-dd HH:MM' )

// say hello
console.log( "This will be logged to stdout." )
console.error( new Error("This is sent to stderr.") )

// 2017-03-03 13:37 This will be logged to stdout.
// 2017-03-03 13:37 Error: This is sent to stderr.
// 2017-03-03 13:37     at Object.<anonymous> (…/test.js:6:16)
// 2017-03-03 13:37     at Module._compile (module.js:571:32)
// 2017-03-03 13:37     at Object.Module._extensions..js (module.js:580:10)
// 2017-03-03 13:37     at Module.load (module.js:488:32)
// 2017-03-03 13:37     at tryModuleLoad (module.js:447:12)
// 2017-03-03 13:37     at Function.Module._load (module.js:439:3)
// 2017-03-03 13:37     at Module.runMain (module.js:605:10)
// 2017-03-03 13:37     at run (bootstrap_node.js:423:7)
// 2017-03-03 13:37     at startup (bootstrap_node.js:147:9)
// 2017-03-03 13:37     at bootstrap_node.js:538:3

Reference

require( 'timestamped-console' )( timestampFormat, prefixPattern )

• timestampFormat String Optional. Date format as used by dateformat and specified by Steven Levithan. Set to something falsy to disable prepending anything. Defaults to "isoDateTime".
• prefixPattern String Optional. The pattern to prepend to each console line, where the percent sign % denotes the timestamp. Defaults to "% ", which separates the timestamp from the log output by a space.