Perfect-log NPM

Perfect Log

Overview

Provide a set of log tools and help to get rid of using console.log in the source code. Control the output between develop and production environment.

Also, it allows you to upload your log(including bussiness or unhandled error) to your own backend service, which you can analyze them or just push to some log manage system, like ELK.

This package is designed for browser end.

Installation

npm

$ npm i -S perfect-log

After installation, import it at the most beginning.

import PerfectLog from 'perfect-log';

// Do some configurations
PerfectLog.enableReport({
  url: 'url'
});

Then, you can use PerfectLog anywhere in your code.

import PerfectLog from 'perfect-log';

this.http.post('/url', {id: 1}).then(data => {
  PerfectLog.debug(data); 
});

Script

Directly download dist/perfect-log.js and include it in your page before any other scripts. Everything works.

<script src="perfect-log.js"></script>
<script src="other.js"></script>

API

PerfectLog.debug(...arg)

Wrapper for console.log, use it like console.log.

PerfectLog.debug(1, 2, 3);
PerfectLog.debug(document.body);
PerfectLog.debug({x: 1, y: 2});

PerfectLog.info(...arg)

Wrapper for console.info, use it like console.info.

PerfectLog.error(...arg)

Wrapper for console.error, use it like console.error.

PerfectLog.enableConsoleOutput()

Allow log info be printed in devtool console.

PerfectLog.disableConsoleOutput()

Nothing would be printed in devtools console.

PerfectLog.enableReport(options: object)

Enable the report module. According the options, log info would be sent to a backend service using POST.

PerfectLog.enableReport({
  url: 'http://some.host/received',
  level: 'INFO',
  data: {
    userId: 1
  },
  beforeSend: (log) => {
    log.version = log.data.version;
   	return log;     
  }
});

Details in options

Field	Description	Default
url	Backend service url, which can handle `POST` HTTP request, is necessary.
level	The least level should it report. Currently only `'DEBUG'`/`'INFO'`/`'ERROR'` is allowed. For example, if set to `'INFO'`, only INFO and ERROR level would be sent to the backend.	`'ERROR'`
data	Any specified data you want to send to the backend along with the log.
beforeSend	Provide a function to transform log info schema into anything you want before sneding to backend.
sample	Expect a number between 0 and 1 or function. `Math.random` will be called and compare to sample number(greater than) to determine whether to report when you give a number. Or just call the sample function that return a boolean representing report or not.

PerfectLog.patchData(data: object)

Add user defined data anywhere before report the log.

PerfectLog.patchData(key: string, value: object)

Add user defined data, another function signature.

Log Info Schema

The data sent to backend is a JSON format defined below:

{
  "level": "INFO",
  "msg": "Uncaught ReferenceError: ppp is not defined",
  "time": "2018-04-12T13:00:37.365Z",
  "data": {
    "pluginVersion": "1.1.2",
    "userId": 1
  },
  "error": Error
  "platform": {
    "browser": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36"
  }
}