initial commit

FileReaderAsync.mjs

@@ -0,0 +1,47 @@
+/** @module FileReaderAsync */
+
+export class FileReaderAsync {
+    /**
+     * @param {String} type The return type (ArrayBuffer, BinaryString, Text, DataURL)
+     * @param {Blob} blob The `Blob` to read
+     * @returns {Promise<ArrayBuffer>} The `Blob` data
+     */
+    static readAs(type,blob){
+        return new Promise((resolve,reject)=>{
+            const fileReader=new FileReader()
+            fileReader.onload=(event)=>resolve(event.target.result)
+            fileReader.onabort=(event)=>reject(event)
+            fileReader.onerror=(event)=>reject(event)
+            fileReader['readAs'+type](blob)
+        })
+    }
+    /**
+     * @param {Blob} blob The `Blob` to read
+     * @returns {Promise<ArrayBuffer>} The `Blob` data
+     */
+    readAsArrayBuffer(blob) { 
+        return FileReaderAsync.readAs('ArrayBuffer',blob)
+    }
+    /**
+     * @depreciated see https://developer.mozilla.org/en-US/docs/Web/API/FileReaderSync/readAsBinaryString
+     * @param {Blob} blob The `Blob` to read
+     * @returns {Promise<String>} The `Blob` data
+     */
+    readAsBinaryString(blob) { 
+        return FileReaderAsync.readAs('BinaryString',blob)
+    }
+    /**
+     * @param {Blob} blob The `Blob` to read
+     * @returns {Promise<String>} The `Blob` data
+     */
+    readAsText(blob) { 
+        return FileReaderAsync.readAs('Text',blob)
+    }
+    /**
+     * @param {Blob} blob The `Blob` to read
+     * @returns {Promise<String>} The `Blob` data
+     */
+    readAsDataURL(blob) { 
+        return FileReaderAsync.readAs('DataURL',blob)
+    }
+}