【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