How to pass the params to the function?

[fredowashere]

We made an hacky solution for this, hope you enjoy!

function execOutside(fnRef, input) {
    let strFn = fnRef.toString();
    const re = /function[^(]*\(([^)]*)\)/;
    const matched = strFn.match(re)[1];
    strFn = strFn.replace(re, "function ()");
    const str = `
self.onmessage = ({ data }) => {
    const [[replacer]] = data;
    (${strFn})();
    self.postMessage(data);
}`.replace("[[replacer]]", matched);

    return new Promise((resolve) => {
        const w = new Worker(URL.createObjectURL(new Blob([str])));
        w.onerror = (err) => console.error(err);
        w.onmessage = ({ data }) => resolve(data);
        w.postMessage(input);
    })
}

console.log(
    await execOutside(
        function (a) {
            a.test = "c";
            for (let i = 0; i < 5e9; i++) {}
            console.log(a.test);
        },
        { test: "test" }
    );
);

P.S.: Sorry for the necroposting xD