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src/plugins/utils.tsx

@@ -0,0 +1,16 @@
+class Util {
+    readFileAsArrayBuffer(file: File | Blob): Promise<ArrayBuffer> {
+        return new Promise((resolve, reject) => {
+            const reader = new FileReader();
+            reader.onload = function(e) {
+                resolve(e.target.result as ArrayBuffer);
+            };
+            reader.onerror = function(e) {
+                reject(e);
+            };
+            reader.readAsArrayBuffer(file);
+        })
+    };
+};
+export default new Util();
+