Get unicode-range (CSS) from string

get-unicode-range-from-string.js

const multirange = require('multi-integer-range').multirange;

// Helpers
const trimLeadingZero = (str) => str[0] === '0' ? str.slice(str.lastIndexOf('0') + 1) : str;
const formatCodePoint = (...values) => `U+${values.map(trimLeadingZero).map(s => s.toString(16)).join('-')}`;
const uniqs = (arrArg) => arrArg.filter((elem, pos, arr) => arr.indexOf(elem) == pos);

// String for translate
const string = ' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~¢£¥¨©«®´¸»ÄÖÜßäöüˆ˚˜–—‘’‚“”„…‹›€™';

// Get all code points for string
const codePoints = uniqs(string.split('').map(c => c.codePointAt(0)));

// Combine into ranges
const ranges = multirange(codePoints);

// Translate into unicode-range
const unicodeRange = ranges.getRanges().map(range => {
	return `${formatCodePoint(range[0])}${range[0] !== range[1] ? '-' + formatCodePoint(range[1]) : ''}`;
});

console.log(unicodeRange.join(', '));