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HTML5 QR code scanner using your webcam

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Not able to use the Instascan Scanner and Camera object. It does not attach to my react app's DOM global window.

When using the library inside a AMD (requireJS) app I get an error probably related with the loading of lodash module. There are plans to package the library as AMD...

Code Responsible ` new Function("body","return function " + e + '() {\n "use strict"; return body.apply(this, arguments);\n};\n')(i)`

## Content result:  ## QR ![image](https://user-images.githubusercontent.com/25346283/60357182-5a004280-99a9-11e9-9c90-8ad224f2680d.png)

`instascan` throws an error in my projects: > TypeError: Cannot read property 'slice' of null > parseJSFunc > node_modules/instascan/src/zxing.js:4 The projects are created with Create React App 2. CRA2 is...

This fix https://github.com/schmich/instascan/commit/bb59b1e1bd0271d0641ea9663bbad42bab217a96 People using https://github.com/schmich/instascan/releases/download/1.0.0/instascan.min.js wont get the fix.

I get the following error when trying to getCameras() on chrome/android I'm using a localhost without https. ``` Uncaught (in promise) {name: "NotReadableError", message: "Could not start video source", constraint:...

I was wondering why I am asked twice to allow the camera in the demo (whereas I have only one by the way) Is it expected? Thanks :)

It work on my laptop webcam, but not work on my android..... But your demo work on my android device. ![1895496375](https://user-images.githubusercontent.com/39258163/40412710-a7fc2074-5ea6-11e8-88cc-1092c06f9cc6.jpg)

Instascan doesn't work on smartphones(chrome/android). Help?