update：兼容RN的处理，尝试

package.json

     "test": "jest --config=scripts/jest/jest.config.js",
     "build": "npm run clean && npm run build:cjs && npm run build:umd",
     "build:cjs": "tsc --project ./tsconfig.cjs.json",
-    "build:umd": "NODE_ENV=production webpack --config scripts/webpack/webpack.config.umd.js",
+    "build:umd": "cross-env NODE_ENV=production webpack --config scripts/webpack/webpack.config.umd.js",
     "clean": "rimraf dist"
   },
   "repository": {
     "node-int64": "^0.4.0"
   },
   "devDependencies": {
+    "cross-env": "^7.0.3",
     "@babel/cli": "^7.4.4",
     "@babel/core": "^7.4.4",
     "@babel/plugin-proposal-class-properties": "^7.4.4",

src/index.ts

     };
 
     ws.onmessage = (ev): void => {
-      if (ev.data instanceof Blob) {
-        let reader = new FileReader();
-        reader.readAsArrayBuffer(ev.data);
-        reader.onload = (): void => {
-          try {
-            let packet = new Packet().unPack(reader.result as ArrayBuffer);
-            let packetLength = packet.headerLength + packet.bodyLength + 20;
-            if (packetLength > this._maxPayload) {
-              throw new Error('the packet is big than ' + this._maxPayload);
-            }
+      if (ev.data instanceof ArrayBuffer) {
+        try {
+          let packet = new Packet().unPack(ev.data);
+          let packetLength = packet.headerLength + packet.bodyLength + 20;
+          if (packetLength > this._maxPayload) {
+            throw new Error('the packet is big than ' + this._maxPayload);
+          }
 
-            let operator = Number(packet.operator) + Number(packet.sequence);
-            let listener = operator.toString();
+          let operator = Number(packet.operator) + Number(packet.sequence);
+          let listener = operator.toString();
 
-            this.listeners.listeners(listener).forEach((param): void => {
-              if (packet.body === '') {
-                packet.body = '{}';
-              }
+          this.listeners.listeners(listener).forEach((param): void => {
+            if (packet.body === '') {
+              packet.body = '{}';
+            }
 
-              this.responseHeader = packet.header;
+            this.responseHeader = packet.header;
 
-              (param as (data: WebSocketResp) => void)(JSON.parse(packet.body));
-            });
+            (param as (data: WebSocketResp) => void)(JSON.parse(packet.body));
+          });
 
-            if (this._enableLogger) {
-              if (operator !== 0 && packet.body !== 'null') {
-                console.info('receive data packet', packet.body);
-              }
+          if (this._enableLogger) {
+            if (operator !== 0 && packet.body !== 'null') {
+              console.info('receive data packet', packet.body);
             }
-          } catch (e) {
-            throw new Error(e);
           }
-        };
+        } catch (e) {
+          throw new Error(e);
+        }
       } else {
         throw new Error('unsupported data format');
       }

yarn.lock

     safe-buffer "^5.0.1"
     sha.js "^2.4.8"
 
+cross-env@^7.0.3:
+  version "7.0.3"
+  resolved "https://registry.nlark.com/cross-env/download/cross-env-7.0.3.tgz#865264b29677dc015ba8418918965dd232fc54cf"
+  integrity sha1-hlJkspZ33AFbqEGJGJZd0jL8VM8=
+  dependencies:
+    cross-spawn "^7.0.1"
+
 cross-spawn@^6.0.0, cross-spawn@^6.0.5:
   version "6.0.5"
   resolved "http://registry.npm.taobao.org/cross-spawn/download/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
     shebang-command "^1.2.0"
     which "^1.2.9"
 
+cross-spawn@^7.0.1:
+  version "7.0.3"
+  resolved "https://registry.nlark.com/cross-spawn/download/cross-spawn-7.0.3.tgz#f73a85b9d5d41d045551c177e2882d4ac85728a6"
+  integrity sha1-9zqFudXUHQRVUcF34ogtSshXKKY=
+  dependencies:
+    path-key "^3.1.0"
+    shebang-command "^2.0.0"
+    which "^2.0.1"
+
 crypto-browserify@^3.11.0:
   version "3.12.0"
   resolved "https://registry.npm.taobao.org/crypto-browserify/download/crypto-browserify-3.12.0.tgz#396cf9f3137f03e4b8e532c58f698254e00f80ec"
   version "2.0.1"
   resolved "http://registry.npm.taobao.org/path-key/download/path-key-2.0.1.tgz#411cadb574c5a140d3a4b1910d40d80cc9f40b40"
 
+path-key@^3.1.0:
+  version "3.1.1"
+  resolved "https://registry.npm.taobao.org/path-key/download/path-key-3.1.1.tgz#581f6ade658cbba65a0d3380de7753295054f375"
+  integrity sha1-WB9q3mWMu6ZaDTOA3ndTKVBU83U=
+
 path-parse@^1.0.6:
   version "1.0.6"
   resolved "http://registry.npm.taobao.org/path-parse/download/path-parse-1.0.6.tgz#d62dbb5679405d72c4737ec58600e9ddcf06d24c"
   dependencies:
     shebang-regex "^1.0.0"
 
+shebang-command@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.npm.taobao.org/shebang-command/download/shebang-command-2.0.0.tgz#ccd0af4f8835fbdc265b82461aaf0c36663f34ea"
+  integrity sha1-zNCvT4g1+9wmW4JGGq8MNmY/NOo=
+  dependencies:
+    shebang-regex "^3.0.0"
+
 shebang-regex@^1.0.0:
   version "1.0.0"
   resolved "http://registry.npm.taobao.org/shebang-regex/download/shebang-regex-1.0.0.tgz#da42f49740c0b42db2ca9728571cb190c98efea3"
 
+shebang-regex@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.nlark.com/shebang-regex/download/shebang-regex-3.0.0.tgz?cache=0&sync_timestamp=1628896299850&other_urls=https%3A%2F%2Fregistry.nlark.com%2Fshebang-regex%2Fdownload%2Fshebang-regex-3.0.0.tgz#ae16f1644d873ecad843b0307b143362d4c42172"
+  integrity sha1-rhbxZE2HPsrYQ7AwexQzYtTEIXI=
+
 shellwords@^0.1.1:
   version "0.1.1"
   resolved "http://registry.npm.taobao.org/shellwords/download/shellwords-0.1.1.tgz#d6b9181c1a48d397324c84871efbcfc73fc0654b"
   dependencies:
     isexe "^2.0.0"
 
+which@^2.0.1:
+  version "2.0.2"
+  resolved "https://registry.nlark.com/which/download/which-2.0.2.tgz#7c6a8dd0a636a0327e10b59c9286eee93f3f51b1"
+  integrity sha1-fGqN0KY2oDJ+ELWckobu6T8/UbE=
+  dependencies:
+    isexe "^2.0.0"
+
 wide-align@^1.1.0:
   version "1.1.3"
   resolved "https://registry.npm.taobao.org/wide-align/download/wide-align-1.1.3.tgz#ae074e6bdc0c14a431e804e624549c633b000457"