Merge pull request #71 from kltchnko/dev

Fix #70: options object being altered by compress func

Author: Donaldcwl

dist/browser-image-compression.js

@@ -54,9 +54,9 @@ export default async function compress (file, options) {
   incProgress()
 
   // exifOrientation
-  options.exifOrientation = options.exifOrientation || await getExifOrientation(file)
+  const exifOrientation = options.exifOrientation || await getExifOrientation(file)
   incProgress()
-  const orientationFixedCanvas = (await isAutoOrientationInBrowser) ? maxWidthOrHeightFixedCanvas : followExifOrientation(maxWidthOrHeightFixedCanvas, options.exifOrientation)
+  const orientationFixedCanvas = (await isAutoOrientationInBrowser) ? maxWidthOrHeightFixedCanvas : followExifOrientation(maxWidthOrHeightFixedCanvas, exifOrientation)
   incProgress()
 
   let quality = options.initialQuality || 1.0