把js代码压缩到如下的格式是怎么压缩的

Question

!function (t) {

function e(i) {

    if (n[i])return n[i].exports;

    var o = n[i] = {exports: {}, id: i, loaded: !1};

    return t[i].call(o.exports, o, o.exports, e), o.loaded = !0, o.exports

}

var n = {};

return e.m = t, e.c = n, e.p = "", e(0)

}({

0: function (t, e, n) {

    t.exports = n(624)

}

});