random-color-library/dist/utils.js

Generate random colors from the Material Design color palette.

export function randomIntFromHash(key, max) {
    const hash = murmur3_32(key);
    return hash % max;
}
export function getRandomInt(max) {
    return Math.floor(Math.random() * max);
}
export function murmur3_32(key) {
    const c1 = 0xcc9e2d51;
    const c2 = 0x1b873593;
    const r1 = 15;
    const r2 = 13;
    const m = 5;
    const n = 0xe6546b64;
    let hash = 0;
    const bytes = new TextEncoder().encode(key);
    const dataView = new DataView(bytes.buffer);
    const chunks = Math.floor(bytes.length / 4);
    for (let i = 0; i < chunks; i++) {
        let k = dataView.getUint32(i * 4, true);
        k = Math.imul(k, c1);
        k = (k << r1) | (k >>> (32 - r1));
        k = Math.imul(k, c2);
        hash ^= k;
        hash = (hash << r2) | (hash >>> (32 - r2));
        hash = Math.imul(hash, m) + n;
    }
    const remainder = bytes.length % 4;
    if (remainder) {
        let k = 0;
        for (let i = 0; i < remainder; i++) {
            k |= (bytes[chunks * 4 + i] || 0) << (i * 8);
        }
        k = Math.imul(k, c1);
        k = (k << r1) | (k >>> (32 - r1));
        k = Math.imul(k, c2);
        hash ^= k;
    }
    hash ^= bytes.length;
    hash ^= hash >>> 16;
    hash = Math.imul(hash, 0x85ebca6b);
    hash ^= hash >>> 13;
    hash = Math.imul(hash, 0xc2b2ae35);
    hash ^= hash >>> 16;
    return hash >>> 0;
}