Mulberry 32-bit random seed generator - Typescript

createRandomWithSeed.ts

/* eslint-disable no-bitwise, no-param-reassign, operator-assignment */

// Mulberry32 - 32-bit random seed generator
// Source: https://github.com/bryc/code/blob/master/jshash/PRNGs.md#mulberry32

/**
 * Function is used to get the same random value every time to ensure
 * data is the same in unit tests and screenshot tests for storybook
 * @param seed
 * @returns random number based on input seed
 */
export function createRandomWithSeed(seed: number): () => number {
    return () => {
        seed |= 0;
        seed = seed + 0x6D2B79F5 | 0;
        let imul = Math.imul(seed ^ seed >>> 15, 1 | seed);
        imul = imul + Math.imul(imul ^ imul >>> 7, 61 | imul) ^ imul;
        return ((imul ^ imul >>> 14) >>> 0) / 4294967296;
    };
}