gunzipScripts-0.0.1.js
It looks for scripts with type text/javascript+gzip and decompresses them. Since decompres operation is sync, you don't need to listen to an event.
If you will use GZIP scripts, it's important to request this script after all the scripts compressed with GZIP.
"use strict";
(() => {
var v = Uint8Array,
A = Uint16Array,
_ = Uint32Array,
rr = new v([0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 0, 0, 0]),
nr = new v([0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 0, 0]),
lr = new v([16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15]),
tr = function (r, n) {
for (var t = new A(31), e = 0; e < 31; ++e) t[e] = n += 1 << r[e - 1];
for (var a = new _(t[30]), e = 1; e < 30; ++e)
for (var u = t[e]; u < t[e + 1]; ++u) a[u] = u - t[e] << 5 | e;
return [t, a]
},
er = tr(rr, 2),
ir = er[0],
cr = er[1];
ir[28] = 258, cr[258] = 28;
var ar = tr(nr, 0),
pr = ar[0],
Ur = ar[1],
q = new A(32768);
for (o = 0; o < 32768; ++o) m = (o & 43690) >>> 1 | (o & 21845) << 1, m = (m & 52428) >>> 2 | (m & 13107) << 2, m = (m & 61680) >>> 4 | (m & 3855) << 4, q[o] = ((m & 65280) >>> 8 | (m & 255) << 8) >>> 1;
var m, o, D = function (r, n, t) {
for (var e = r.length, a = 0, u = new A(n); a < e; ++a) r[a] && ++u[r[a] - 1];
var g = new A(n);
for (a = 0; a < n; ++a) g[a] = g[a - 1] + u[a - 1] << 1;
var s;
if (t) {
s = new A(1 << n);
var i = 15 - n;
for (a = 0; a < e; ++a)
if (r[a])
for (var f = a << 4 | r[a], h = n - r[a], l = g[r[a] - 1]++ << h, w = l | (1 << h) - 1; l <= w; ++l) s[q[l] >>> i] = f
} else
for (s = new A(e), a = 0; a < e; ++a) r[a] && (s[a] = q[g[r[a] - 1]++] >>> 15 - r[a]);
return s
},
E = new v(288);
for (o = 0; o < 144; ++o) E[o] = 8;
var o;
for (o = 144; o < 256; ++o) E[o] = 9;
var o;
for (o = 256; o < 280; ++o) E[o] = 7;
var o;
for (o = 280; o < 288; ++o) E[o] = 8;
var o, or = new v(32);
for (o = 0; o < 32; ++o) or[o] = 5;
var o;
var gr = D(E, 9, 1);
var yr = D(or, 5, 1),
R = function (r) {
for (var n = r[0], t = 1; t < r.length; ++t) r[t] > n && (n = r[t]);
return n
},
p = function (r, n, t) {
var e = n / 8 | 0;
return (r[e] | r[e + 1] << 8) >> (n & 7) & t
},
$ = function (r, n) {
var t = n / 8 | 0;
return (r[t] | r[t + 1] << 8 | r[t + 2] << 16) >> (n & 7)
},
wr = function (r) {
return (r + 7) / 8 | 0
},
mr = function (r, n, t) {
(n == null || n < 0) && (n = 0), (t == null || t > r.length) && (t = r.length);
var e = new (r.BYTES_PER_ELEMENT == 2 ? A : r.BYTES_PER_ELEMENT == 4 ? _ : v)(t - n);
return e.set(r.subarray(n, t)), e
};
var xr = ["unexpected EOF", "invalid block type", "invalid length/literal", "invalid distance", "stream finished", "no stream handler", , "no callback", "invalid UTF-8 data", "extra field too long", "date not in range 1980-2099", "filename too long", "stream finishing", "invalid zip data"],
x = function (r, n, t) {
var e = new Error(n || xr[r]);
if (e.code = r, Error.captureStackTrace && Error.captureStackTrace(e, x), !t) throw e;
return e
},
zr = function (r, n, t) {
var e = r.length;
if (!e || t && t.f && !t.l) return n || new v(0);
var a = !n || t,
u = !t || t.i;
t || (t = {}), n || (n = new v(e * 3));
var g = function (V) {
var X = n.length;
if (V > X) {
var b = new v(Math.max(X * 2, V));
b.set(n), n = b
}
},
s = t.f || 0,
i = t.p || 0,
f = t.b || 0,
h = t.l,
l = t.d,
w = t.m,
T = t.n,
I = e * 8;
do {
if (!h) {
s = p(r, i, 1);
var B = p(r, i + 1, 3);
if (i += 3, B)
if (B == 1) h = gr, l = yr, w = 9, T = 5;
else if (B == 2) {
var G = p(r, i, 31) + 257,
Y = p(r, i + 10, 15) + 4,
W = G + p(r, i + 5, 31) + 1;
i += 14;
for (var C = new v(W), O = new v(19), c = 0; c < Y; ++c) O[lr[c]] = p(r, i + c * 3, 7);
i += Y * 3;
for (var j = R(O), sr = (1 << j) - 1, ur = D(O, j, 1), c = 0; c < W;) {
var d = ur[p(r, i, sr)];
i += d & 15;
var y = d >>> 4;
if (y < 16) C[c++] = y;
else {
var S = 0,
F = 0;
for (y == 16 ? (F = 3 + p(r, i, 3), i += 2, S = C[c - 1]) : y == 17 ? (F = 3 + p(r, i, 7), i += 3) : y == 18 && (F = 11 + p(r, i, 127), i += 7); F--;) C[c++] = S
}
}
var J = C.subarray(0, G),
z = C.subarray(G);
w = R(J), T = R(z), h = D(J, w, 1), l = D(z, T, 1)
} else x(1);
else {
var y = wr(i) + 4,
Z = r[y - 4] | r[y - 3] << 8,
k = y + Z;
if (k > e) {
u && x(0);
break
}
a && g(f + Z), n.set(r.subarray(y, k), f), t.b = f += Z, t.p = i = k * 8, t.f = s;
continue
}
if (i > I) {
u && x(0);
break
}
}
a && g(f + 131072);
for (var vr = (1 << w) - 1, hr = (1 << T) - 1, L = i; ; L = i) {
var S = h[$(r, i) & vr],
M = S >>> 4;
if (i += S & 15, i > I) {
u && x(0);
break
}
if (S || x(2), M < 256) n[f++] = M;
else if (M == 256) {
L = i, h = null;
break
} else {
var K = M - 254;
if (M > 264) {
var c = M - 257,
U = rr[c];
K = p(r, i, (1 << U) - 1) + ir[c], i += U
}
var P = l[$(r, i) & hr],
N = P >>> 4;
P || x(3), i += P & 15;
var z = pr[N];
if (N > 3) {
var U = nr[N];
z += $(r, i) & (1 << U) - 1, i += U
}
if (i > I) {
u && x(0);
break
}
a && g(f + 131072);
for (var Q = f + K; f < Q; f += 4) n[f] = n[f - z], n[f + 1] = n[f + 1 - z], n[f + 2] = n[f + 2 - z], n[f + 3] = n[f + 3 - z];
f = Q
}
}
t.l = h, t.p = L, t.b = f, t.f = s, h && (s = 1, t.m = w, t.d = l, t.n = T)
} while (!s);
return f == n.length ? n : mr(n, 0, f)
};
var Ar = new v(0);
var Sr = function (r) {
(r[0] != 31 || r[1] != 139 || r[2] != 8) && x(6, "invalid gzip data");
var n = r[3],
t = 10;
n & 4 && (t += r[10] | (r[11] << 8) + 2);
for (var e = (n >> 3 & 1) + (n >> 4 & 1); e > 0; e -= !r[t++]);
return t + (n & 2)
},
Mr = function (r) {
var n = r.length;
return (r[n - 4] | r[n - 3] << 8 | r[n - 2] << 16 | r[n - 1] << 24) >>> 0
};
function H(r, n) {
return zr(r.subarray(Sr(r), -8), n || new v(Mr(r)))
}
var Tr = typeof TextDecoder < "u" && new TextDecoder,
Cr = 0;
try {
Tr.decode(Ar, {
stream: !0
}), Cr = 1
} catch { }
var fr = () => {
var n;
let r = document.querySelectorAll('script[type="text/javascript+gzip"][src]');
for (let t of r) try {
let e = t.src.match(/^data:(.*?)(?:;(base64))?,(.*)$/);
if (!e) continue;
let [a, u, g, s] = e, i = Uint8Array.from(g ? atob(s) : decodeURIComponent(s), w => w.charCodeAt(0)), h = new TextDecoder().decode(H(i)), l = document.createElement("script");
l.textContent = h, (n = t.parentNode) == null || n.replaceChild(l, t)
} catch (e) {
console.error("Could not gunzip script", t, e)
}
};
fr();
window.gunzipSync = H;
window.gunzipScripts = fr;
})();You can check this example to see how it's used.
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