Function decode$1

packages/socket.io/client-dist/socket.io.js:266–293

(base64)

    lookup$1[chars.charCodeAt(i)] = i;
  }
  var decode$1 = function decode(base64) {
    var bufferLength = base64.length * 0.75,
      len = base64.length,
      i,
      p = 0,
      encoded1,
      encoded2,
      encoded3,
      encoded4;
    if (base64[base64.length - 1] === '=') {
      bufferLength--;
      if (base64[base64.length - 2] === '=') {
        bufferLength--;
      }
    }
    var arraybuffer = new ArrayBuffer(bufferLength),
      bytes = new Uint8Array(arraybuffer);
    for (i = 0; i < len; i += 4) {
      encoded1 = lookup$1[base64.charCodeAt(i)];
      encoded2 = lookup$1[base64.charCodeAt(i + 1)];
      encoded3 = lookup$1[base64.charCodeAt(i + 2)];
      encoded4 = lookup$1[base64.charCodeAt(i + 3)];
      bytes[p++] = encoded1 << 2 | encoded2 >> 4;
      bytes[p++] = (encoded2 & 15) << 4 | encoded3 >> 2;
      bytes[p++] = (encoded3 & 3) << 6 | encoded4 & 63;
    }
    return arraybuffer;
  };

  var withNativeArrayBuffer$1 = typeof ArrayBuffer === "function";
  var decodePacket = function decodePacket(encodedPacket, binaryType) {