Adding simple log levels to console logging

README.md

Example:

import log from './simple-log.js'

log.level = 'info';

log.trace('should NOOP');
log.debug('should NOOP');
log.info('should output');
log.log('should output');
log.warn('should output');
log.error('should output');


log.level = 'silent';

log.trace('should NOOP');
log.debug('should NOOP');
log.info('should NOOP');
log.log('should NOOP');
log.warn('should NOOP');
log.error('should NOOP');

simple-log.js

const NOOP = () => {};

const LEVELS = [
    'trace',
    'debug',
    'info',
    'log',
    'warn',
    'error',
    'silent',
];

const _ = new WeakMap();
export class Log {
    constructor(level = 'info') {
        _.set(this, {});
        this.level = level;
    }
    get level() {
        return _.get(this).level;
    }
    set level(value) {
        const index = LEVELS.findIndex(level => level === value);
        if(index === -1) throw new Error('Invalid log level');

        for(let i = 0; i < index; i++){
            this[LEVELS[i]] = NOOP;
        }
        for(let i = index; i < LEVELS.length - 1; i++) {
            this[LEVELS[i]] = console[LEVELS[i]];
        }
        _.get(this).level = value;
    }
}

export default new Log();