Minor miscellaneous refactorings

Author: maximerety

lib/index.js

@@ -43,11 +43,8 @@ var FileInput = function (_React$Component) {
 
 
     _this.handleChange = function (e) {
-      var files = [];
-      for (var i = 0; i < e.target.files.length; i++) {
-        // Convert to Array.
-        files.push(e.target.files[i]);
-      }
+      var files = Array.prototype.slice.call(e.target.files); // Convert into Array
+      var readAs = (_this.props.as || 'url').toLowerCase();
 
       // Build Promise List, each promise resolved by FileReader.onload.
       Promise.all(files.map(function (file) {
@@ -60,7 +57,7 @@ var FileInput = function (_React$Component) {
           };
 
           // Read the file with format based on this.props.as.
-          switch ((_this.props.as || 'url').toLowerCase()) {
+          switch (readAs) {
             case 'binary':
               {
                 reader.readAsBinaryString(file);
@@ -94,7 +91,7 @@ var FileInput = function (_React$Component) {
     };
 
     var win = (typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' ? window : {};
-    if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && (!win.File || !win.FileReader || !win.FileList || !win.Blob)) {
+    if (!win.File || !win.FileReader || !win.FileList || !win.Blob) {
       console.warn('[react-file-reader-input] Some file APIs detected as not supported.' + ' File reader functionality may not fully work.');
     }
     return _this;

src/index.js

@@ -14,20 +14,17 @@ export default class FileInput extends React.Component {
     super(props);
 
     const win = typeof window === 'object' ? window : {};
-    if ((typeof window === 'object') && (!win.File || !win.FileReader || !win.FileList || !win.Blob)) {
+    if (!win.File || !win.FileReader || !win.FileList || !win.Blob) {
       console.warn(
         '[react-file-reader-input] Some file APIs detected as not supported.' +
         ' File reader functionality may not fully work.'
       );
     }
   }
 
-  handleChange = e => {
-    const files = [];
-    for (let i = 0; i < e.target.files.length; i++) {
-      // Convert to Array.
-      files.push(e.target.files[i]);
-    }
+  handleChange = (e) => {
+    const files = Array.prototype.slice.call(e.target.files); // Convert into Array
+    const readAs = (this.props.as || 'url').toLowerCase();
 
     // Build Promise List, each promise resolved by FileReader.onload.
     Promise.all(files.map(file => new Promise((resolve, reject) => {
@@ -39,7 +36,7 @@ export default class FileInput extends React.Component {
       };
 
       // Read the file with format based on this.props.as.
-      switch ((this.props.as || 'url').toLowerCase()) {
+      switch (readAs) {
         case 'binary': {
           reader.readAsBinaryString(file);
           break;