window.crypto random int [0, 99] untested unused function

bucket.js

// Returns a random integer in the range [0, 99]
function getBucketInt() {
    try {
        var random;
        
        // inside try-block because Uint8Array does
        // not have wide browser support
        var ab = new Uint8Array(1);
        
        // note: 10 is arbitrary loop limit -
        // just want to have 100% guarantee 
        // that this loop will end - there is 
        // still some probability that even after
        // 10 loops, you'll get a value in [200, 255]
        // thus slightly biasing buckets in [0, 55]
        for (var i = 0; i < 10; i++) {
            
            // inside try-block because crypto does
            // not have wide browser support
            crypto.getRandomValues(ab);
            
            random = ab[0];
            if (random < 200)
                break;
        }
        
        return random % 100;
    } catch (e) {
        return Math.floor(Math.random() * 100);
    }
}