@Randy Stewart 
did you ever get SSE working with CSP? Trying to implement Data-Star with CSP, and cannot for the life of me seem to get a GET stream to stay open and actually stream, lol.

exactly, but that was not clear until I hit this. I assumed "return" meant stop processing the rest of the line. Sort of like this in Javascript, I just assumed returned meant to return, not continue...

// a = b && c = d
function foo(a, b, c, d) {
    let res = a === b ? 1 : 0; // a = b
    if (res === 0) { // left side of &&
        return res // return left side
    }
    res = c // res && c
    res = res === d ? 1 : 0 // res = d
    return res
}

I should have read this comment the first time my import failed! Updated my import file to the correct new version (the one with the `Export` and `Document` elements) and it worked like a charm. And just for reference, you don't have to put in your `zv` string or a `ts` at least with the version I am using, haha.