console-tee

Tee (duplicate) all console output to a file, using console-interceptor.

Install

npm i console-tee

Usage

require("console-tee");

Or run your script with:

node --require console-tee your-script.js

By default, logs are written to output.log in the current directory. You can customize the log file via arguments or environment variables.

Options

• Log file:
  • 1st CLI argument: node --require console-tee your-script.js mylog.txt
  • Environment variable: CONSOLE_TEE=mylog.txt
• Error log file:
  • 2nd CLI argument: node --require console-tee your-script.js mylog.txt myerr.txt
  • Environment variable: CONSOLE_TEE_ERR=myerr.txt
• Sync writes:
  • By default, writes are synchronous unless you use --no-sync or set CONSOLE_TEE_SYNC=false.

Example

console.log("hello");
console.error("error!");

node --require console-tee test.js

This will write all console output to output.log.

API

// No API: just require the module to activate teeing.
require("console-tee");

Related

• console-interceptor
• console-source