41 lines
935 B
JavaScript
41 lines
935 B
JavaScript
'use strict';
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const chalk = require('..');
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const ignoreChars = /[^!-~]/g;
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const delay = milliseconds => new Promise(resolve => setTimeout(resolve, milliseconds));
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function rainbow(string, offset) {
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if (!string || string.length === 0) {
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return string;
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}
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const hueStep = 360 / string.replace(ignoreChars, '').length;
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let hue = offset % 360;
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const characters = [];
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for (const character of string) {
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if (character.match(ignoreChars)) {
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characters.push(character);
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} else {
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characters.push(chalk.hsl(hue, 100, 50)(character));
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hue = (hue + hueStep) % 360;
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}
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}
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return characters.join('');
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}
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async function animateString(string) {
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console.log();
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for (let i = 0; i < 360 * 5; i++) {
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console.log('\u001B[1F\u001B[G', rainbow(string, i));
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await delay(2); // eslint-disable-line no-await-in-loop
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}
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}
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(async () => {
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console.log();
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await animateString('We hope you enjoy Chalk! <3');
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console.log();
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})();
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