chalk是一个颜色的插件。可以通过chalk.blue(‘hello world’)来改变颜色，但是我并没有式样成功，有待验证。
可以参考 npm chalk官网
简单用法 $ npm install chalk const chalk = require('chalk'); console.log(chalk.blue('Hello world!')); const chalk = require('chalk');const log = console.log;// Combine styled and normal strings log(chalk.blue('Hello') + 'World' + chalk.red('!'));// Compose multiple styles using the chainable API log(chalk.blue.bgRed.bold('Hello world!'));// Pass in multiple arguments log(chalk.blue('Hello', 'World!', 'Foo', 'bar', 'biz', 'baz'));// Nest styles log(chalk.red('Hello', chalk.underline.bgBlue('world') wxdhk);// Nest styles of the same type even (color, underline, background) log(chalk.green( 'I am a green line ' + chalk.blue.underline.bold('with a blue substring') + ' that becomes green again!'));// ES2015 template literal log(`CPU: ${chalk.red('90%')}RAM: ${chalk.green('40%')}DISK: ${chalk.yellow('70%')}`);// ES2015 tagged template literal log(chalk`CPU: {red ${cpu.totalPercent}%}RAM: {green ${ram.used / ram.total * 100}%}DISK: {rgb(255,131,0) ${disk.used / disk.total * 100}%}`);// Use RGB colors in terminal emulators that support it. log(chalk.keyword('orange')('Yay for orange colored text!'));log(chalk.rgb(123, 45, 67).underline('Underlined reddish color'));log(chalk.hex('#DEADED').bold('Bold gray!')); 98878206