iter.js

function* primes(n) {
    const container = []
    yield 2;
    container.push(2);

    for(let i = 3; i <= n; i += 2) {
        let is_prime = true;
        for(p of container) {
            if(i % p == 0) {
                is_prime = false;
                break;
            }
        }
        if(is_prime) {
            container.push(i);
            yield i;
        }
    }
}


for(p of primes(100)) {
    console.log(p);
}