import * as chalk from 'chalk'; export type LogLevel = 'Error' | 'Warn' | 'Info'; function toLevelColor(level: LogLevel): chalk.ChalkStyle { switch (level) { case 'Error': return chalk.red; case 'Warn': return chalk.yellow; case 'Info': return chalk.blue; } } export function log(level: LogLevel, message: string): void; export function log(level: LogLevel, message: string, domain: string): void; export function log(level: LogLevel, message: string, domain?: string): void { if (typeof domain == 'string') { log(level, `[${domain}] ${message}`); } else { let color = toLevelColor(level); let time = (new Date()).toLocaleTimeString('ja-JP'); console.log(`[${time} ${color.bold(level.toUpperCase())}]: ${message}`); } }