forked from chalk/chalk
/
rainbow.js
40 lines (33 loc) 路 950 Bytes
/
rainbow.js
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import chalk from '../source/index.js';
import convertColor from 'color-convert';
import updateLog from 'log-update';
import delay from 'yoctodelay';
const ignoreChars = /[^!-~]/g;
function rainbow(string, offset) {
if (!string || string.length === 0) {
return string;
}
const hueStep = 360 / string.replace(ignoreChars, '').length;
let hue = offset % 360;
const characters = [];
for (const character of string) {
if (ignoreChars.test(character)) {
characters.push(character);
} else {
characters.push(chalk.hex(convertColor.hsl.hex(hue, 100, 50))(character));
hue = (hue + hueStep) % 360;
}
}
return characters.join('');
}
async function animateString(string) {
for (let index = 0; index < 360 * 5; index++) {
updateLog(rainbow(string, index));
await delay(2); // eslint-disable-line no-await-in-loop
}
}
(async () => {
console.log();
await animateString('We hope you enjoy Chalk! <3');
console.log();
})();