Could you add comments to this JavaScript function explaining what it does?
Utils.readJson = function (file, callback) {
    var req = new XMLHttpRequest();
    req.onerror = function (e) {
        // Utils.log(`[Utils][readJson] Error while trying to read  ${file}`, e);
    };
    req.overrideMimeType('application/json');
    req.open('GET', file, true);
    req.onreadystatechange = function () {
        if (req.readyState === 4) {
            // && req.status == "200") {
            if (callback) callback(req.responseText);
        }
    };
    req.send(null);
};
system
kya aap is javascript fnction main tippanee jod sakate hai ki yah kya karata he?
Utils.readjson = fnction (fil, colbach) {
    var req = new xmlhttprequest ();
    req.onerror = function (e) {
        // utils.log (`[UTILS] [READJSON] ERROR $ {fil}}`, e) ko padhane kii koshish karte samay truti;
    };
    Req.OverRidemimetype ('aplication/JSON');
    req.open ('get', fil, true);
    req.onerdeystatechange = function () {
        if (req.readystate === 4) {
            // && req.status == "200") {
            if (colbach) colbach (req.responsetext);
        }
    };
    req.send (null);
};
user
yahan tippaniyon ke saath Readjson fnction anotate kiya gaya he:

Utils.readjson = fnction (fil, colbach) {
    // ek XMLHTTPREQUEST banaaen.
    var req = new xmlhttprequest ();
    // anurodh ko nishpadit karte samay hone vaali trutiyon ko sanbhaalein.
    req.onerror = function (e) {
        // utils.log (`[UTILS] [READJSON] ERROR $ {fil}}`, e) ko padhane kii koshish karte samay truti;
    };
    // JSON sweekaar karne ke anurodh ke MIME prakaar set karen.
    Req.OverRidemimetype ('aplication/JSON');
    // ise padhane ke liye sthaneey JSON fil ko ek anurodh bhejein.
    req.open ('get', fil, true);
    // jab fil padhi gai he to sunen.
    req.onerdeystatechange = function () {
        // jaanch karata he ki anurodh trutiyon ke bina kiya jaataa he.
        if (req.readystate === 4) {
            // && req.status == "200") {
            // praapt JSON ke saath colbach nishpadit karata he.
            if (colbach) colbach (req.responsetext);
        }
    };
    // NULL bhejkar anurodh ko samaapt karata he.
    req.send (null);
};
assistant
<|system|>
</s>
<|user|>
kya aap is javascript fnction main tippanee jod sakate hai ki yah kya karata he?
Utils.readjson = fnction (fil, colbach) {
    var req = new xmlhttprequest ();
    req.onerror = function (e) {
        // utils.log (`[UTILS] [READJSON] ERROR $ {fil}}`, e) ko padhane kii koshish karte samay truti;
    };
    Req.OverRidemimetype ('aplication/JSON');
    req.open ('get', fil, true);
    req.onerdeystatechange = function () {
        if (req.readystate === 4) {
            // && req.status == "200") {
            if (colbach) colbach (req.responsetext);
        }
    };
    req.send (null);
};</s>
<|assistant|>
yahan tippaniyon ke saath Readjson fnction anotate kiya gaya he:

Utils.readjson = fnction (fil, colbach) {
    // ek XMLHTTPREQUEST banaaen.
    var req = new xmlhttprequest ();
    // anurodh ko nishpadit karte samay hone vaali trutiyon ko sanbhaalein.
    req.onerror = function (e) {
        // utils.log (`[UTILS] [READJSON] ERROR $ {fil}}`, e) ko padhane kii koshish karte samay truti;
    };
    // JSON sweekaar karne ke anurodh ke MIME prakaar set karen.
    Req.OverRidemimetype ('aplication/JSON');
    // ise padhane ke liye sthaneey JSON fil ko ek anurodh bhejein.
    req.open ('get', fil, true);
    // jab fil padhi gai he to sunen.
    req.onerdeystatechange = function () {
        // jaanch karata he ki anurodh trutiyon ke bina kiya jaataa he.
        if (req.readystate === 4) {
            // && req.status == "200") {
            // praapt JSON ke saath colbach nishpadit karata he.
            if (colbach) colbach (req.responsetext);
        }
    };
    // NULL bhejkar anurodh ko samaapt karata he.
    req.send (null);
};</s>
