How to use the pako/lib/zlib/inflate.js.inflate function in pako

this.strm.input = data;
        this.strm.avail_in = this.strm.input.length;
        this.strm.next_in = 0;
        this.strm.next_out = 0;

        // resize our output buffer if it's too small
        // (we could just use multiple chunks, but that would cause an extra
        // allocation each time to flatten the chunks)
        if (expected > this.chunkSize) {
            this.chunkSize = expected;
            this.strm.output = new Uint8Array(this.chunkSize);
        }

        this.strm.avail_out = this.chunkSize;

        zlib.inflate(this.strm, flush);

        return new Uint8Array(this.strm.output.buffer, 0, this.strm.next_out);
    },

this.strm.input = data;
        this.strm.avail_in = this.strm.input.length;
        this.strm.next_in = 0;
        this.strm.next_out = 0;

        // resize our output buffer if it's too small
        // (we could just use multiple chunks, but that would cause an extra
        // allocation each time to flatten the chunks)
        if (expected > this.chunkSize) {
            this.chunkSize = expected;
            this.strm.output = new Uint8Array(this.chunkSize);
        }

        this.strm.avail_out = this.chunkSize;

        zlib.inflate(this.strm, flush);

        return new Uint8Array(this.strm.output.buffer, 0, this.strm.next_out);
    },

throw new Error('invalid number of gzip magic number bytes read');
      }

    // fallthrough
    case exports.INFLATE:
    case exports.GUNZIP:
    case exports.INFLATERAW:
      this.err = zlib_inflate.inflate(this.strm, this.flush

      // If data was encoded with dictionary
      );if (this.err === exports.Z_NEED_DICT && this.dictionary) {
        // Load it
        this.err = zlib_inflate.inflateSetDictionary(this.strm, this.dictionary);
        if (this.err === exports.Z_OK) {
          // And try to decode again
          this.err = zlib_inflate.inflate(this.strm, this.flush);
        } else if (this.err === exports.Z_DATA_ERROR) {
          // Both inflateSetDictionary() and inflate() return Z_DATA_ERROR.
          // Make it possible for After() to tell a bad dictionary from bad
          // input.
          this.err = exports.Z_NEED_DICT;
        }
      }
      while (this.strm.avail_in > 0 && this.mode === exports.GUNZIP && this.err === exports.Z_STREAM_END && this.strm.next_in[0] !== 0x00) {
        // Bytes remain in input buffer. Perhaps this is another compressed
        // member in the same archive, or just trailing garbage.
        // Trailing zero bytes are okay, though, since they are frequently
        // used for padding.

        this.reset();
        this.err = zlib_inflate.inflate(this.strm, this.flush);
      }

strm.next_in = in_off;
  strm.avail_out = out_len;
  strm.output = out;
  strm.next_out = out_off;
  
  switch (this.mode) {
    case exports.DEFLATE:
    case exports.GZIP:
    case exports.DEFLATERAW:
      var status = zlib_deflate.deflate(strm, flush);
      break;
    case exports.UNZIP:
    case exports.INFLATE:
    case exports.GUNZIP:
    case exports.INFLATERAW:
      var status = zlib_inflate.inflate(strm, flush);
      break;
    default:
      throw new Error("Unknown mode " + this.mode);
  }
  
  if (status !== exports.Z_STREAM_END && status !== exports.Z_OK) {
    this._error(status);
  }
  
  this.write_in_progress = false;
  return [strm.avail_in, strm.avail_out];
};

strm.next_in = in_off;
  strm.avail_out = out_len;
  strm.output = out;
  strm.next_out = out_off;
  
  switch (this.mode) {
    case exports.DEFLATE:
    case exports.GZIP:
    case exports.DEFLATERAW:
      var status = zlib_deflate.deflate(strm, flush);
      break;
    case exports.UNZIP:
    case exports.INFLATE:
    case exports.GUNZIP:
    case exports.INFLATERAW:
      var status = zlib_inflate.inflate(strm, flush);
      break;
    default:
      throw new Error("Unknown mode " + this.mode);
  }
  
  if (status !== exports.Z_STREAM_END && status !== exports.Z_OK) {
    this._error(status);
  }
  
  this.write_in_progress = false;
  return [strm.avail_in, strm.avail_out];
};