【每日一包0030】chalk

[github地址：https://github.com/ABCDdouyae...]

chalk

美化终端的字符串样式

你可以像下面这样简单的使用它

const chalk = require('chalk');
const log = console.log;

//将样式字符串和普通字符串合并使用
log(chalk.blue('Hello') + ' world' + chalk.red('!'));

//采用链式方法调用多个API
log(chalk.blue.bgRed.bold('Hello world!'));

//传入多个参数
log(chalk.blue('Hello', 'World!', 'Foo', 'bar', 'biz', 'baz'));

//API套用
log(chalk.red('Hello', chalk.underline.bgBlue('world') + '!'));
log(chalk.green(
    'I am a green line ' +
    chalk.blue.underline.bold('with a blue substring') +
    ' that becomes green again!'
));

//支持反引号解析字符串
log(`
CPU: ${chalk.red('90%')}
RAM: ${chalk.green('40%')}
DISK: ${chalk.yellow('70%')}
`);

let cpu = {totalPercent: 67};
let ram = {used:40, total:100};
let disk = {used: 130, total: 512}
log(chalk`
CPU: {red ${cpu.totalPercent}%}
RAM: {green ${ram.used / ram.total * 100}%}
DISK: {rgb(255,131,0) ${disk.used / disk.total * 100}%}
`);

//支持各种书写颜色的方式
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!'));

可以定义自己的主题

const chalk = require('chalk');
const log = console.log;
const error = chalk.bold.red;
const warning = chalk.keyword('orange');

log(error('Error!'));
log(warning('Warning!'));

利用console.log字符串替换

const chalk = require('chalk');
const log = console.log;

const name = 'Sindre';
console.log(chalk.green('Hello %s'), name);

API

chalk.enable: 是否启用chalk

const log = console.log;
const ctx1 = new chalk.constructor({enabled: true});
log(ctx1.red('Hello World'));
const ctx2 = new chalk.constructor({enabled: false});
log(ctx2.red('Hello World'));

chalk.level:设置chalk支持的颜色

const ctx = new chalk.constructor({level: 0});

• 1.All colors disabled
• 2.Basic color support (16 colors)
• 3.256 color support
• 4.Truecolor support (16 million colors)

chalk.supportsColor:检测terminal支持的色值格式,直接调用的包supports-color的stdout

log(chalk.supportsColor)//{ level: 2, hasBasic: true, has256: true, has16m: false }

支持的样式和颜色

样式

• reset
• bold
• dim
• italic (Not widely supported)
• underline
• inverse
• hidden
• strikethrough (Not widely supported)
• visible (Text is emitted only if enabled)

颜色

• black
• red
• green
• yellow
• blue (On Windows the bright version is used since normal blue is illegible)
• magenta
• cyan
• white
• gray ("bright black")
• redBright
• greenBright
• yellowBright
• blueBright
• magentaBright
• cyanBright
• whiteBright

背景色

• bgBlack
• bgRed
• bgGreen
• bgYellow
• bgBlue
• bgMagenta
• bgCyan
• bgWhite
• bgBlackBright
• bgRedBright
• bgGreenBright
• bgYellowBright
• bgBlueBright
• bgMagentaBright
• bgCyanBright
• bgWhiteBright

颜色格式

• rgb - Example: chalk.rgb(255, 136, 0).bold('Orange!')
• hex - Example: chalk.hex('#FF8800').bold('Orange!')
• keyword (CSS keywords) - Example: chalk.keyword('orange').bold('Orange!')
• hsl - Example: chalk.hsl(32, 100, 50).bold('Orange!')
• hsv - Example: chalk.hsv(32, 100, 100).bold('Orange!')
• hwb - Example: chalk.hwb(32, 0, 50).bold('Orange!')
• ansi16
• ansi256