An experimental debug logging library.

Use berry-pretty's dlog instead of calling console.log() directly.

dlog

• dlog statements are more concise to write and read in the source

dlog({ myNumber, myObject });

• dlog's output is configurable. By default:
  • Function name is provided automatically.
  • Nested data structures are expanded .
  • Floating point precision shows a manageable number of digits.

Main.ts:7 myFunction           | myCount: 3.142  myObject: {some: {more: "stuff"}}

console.log

Writing raw console.log() starts to feel verbose by comparision.

console.log("myFunction()  myNumber:", myNumber, " myObject:", myObject);

and the logged output is harder to read or customize.

Main.ts:8 myFunction()  myNumber: 3.141592653589793  myObject: {some: {…}}

Install and Use

$ npm install berry-pretty

import { dlog } from "berry-pretty";

Features

• function name is logged automatically
• variable names are logged automatically
• nested data structures expanded by default (to configurable depth)
• (TBD) extensible to pretty-print custom formats for your favorite data structures

Variations

dlog(...); // debug logging
derr(...); // errors
dwarn(...); // warning
dsert(test, ...); // assertions
dlogOpt(options, ...); // debug logging, with custom options
dLogDefaultOptions(options); // set default options for all future logging

Options

{
  showFile?: boolean, // (false) show the file name as well as the function name
  precision?: number, // (4) numeric precision for floating point numbers
  maxDepth?: number,  // (6) log nested structures up to the depth
}

Status

Early, experimental, but already seems useful. Needs testing on non-chrome and non-macos platforms. Contributions welcome.