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add rainbow example

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Qix- committed Jun 29, 2017
1 parent 09fb2d8 commit c0155688cf57edb6bee5b97dcc3548f47454e645
Showing with 42 additions and 2 deletions.
  1. +39 βˆ’0 examples/rainbow.js
  2. +3 βˆ’2 example.js β†’ examples/screenshot.js
@@ -0,0 +1,39 @@
const chalk = require('..');

const ignoreChars = /[^!-~]/;

function rainbow(str, offset) {
if (!str || str.length === 0) {
return str;
}

const hueStep = 360 / str.replace(ignoreChars, '').length;

let hue = offset % 360;
const chars = [];
for (const c of str) {
if (c.match(ignoreChars)) {
chars.push(c);
} else {
chars.push(chalk.hsl(hue, 100, 50)(c));
hue = (hue + hueStep) % 360;
}
}

return chars.join('');
}

function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}

async function animateString(str) {
console.log();
for (let i = 0; i < 360*5; i++) {
console.log('\x1b[1F\x1b[G ', rainbow(str, i));
await sleep(2);
}
}

console.log();
animateString('We hope you enjoy the new version of Chalk 2! <3').then(() => console.log());
@@ -1,8 +1,9 @@
'use strict';
const chalk = require('.');
const chalk = require('..');
const styles = require('ansi-styles');

// Generates screenshot
for (const key of Object.keys(chalk.styles)) {
for (const key of Object.keys(styles)) {
let ret = key;

if (key === 'reset' || key === 'hidden' || key === 'grey') {

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