<script src="lib/BinaryPacker.js"></script>
<script src="lib/BinaryPacker0x0002.js"></script>
<script>

var formatID = 0x0002; // APNGFrameData
var source = {
        x: 1, y: 2, w: 101, h: 102,
        delay: 16.666, blend: 4, dispose: 5,
        pixels: new Uint8Array([1,2,3,4,5])
    };

var packed = BinaryPacker.pack(source, formatID);
var result = BinaryPacker.unpack(packed);

if ( source.x === result.x &&
     source.y === result.y &&
     source.w === result.w &&
     source.h === result.h) {
    console.log("OK");
} else {
    console.log("ERROR");
}
</script>

importScripts("lib/BinaryPacker.js");
importScripts("lib/BinaryPacker0x0002.js");

...

var BinaryPacker = require("lib/BinaryPacker.js");
var BinaryPacker0x0002 = require("lib/BinaryPacker0x0002.js");

...