picturelements.github.io/sobel.html at master · PicturElements/picturelements.github.io · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <title>Sobel - PicturElements</title>
    <link rel="icon" href="pelement.png">
    <link href="https://fonts.googleapis.com/css?family=Roboto:300,700" rel="stylesheet" type="text/css">

    <style>
      body{
        background-color:white;
        margin:0;
      }

      input{
        display:block;
        position:fixed;
      }

      #background{
        display:block;
        position:fixed;
        width:100%;
        height:100%;
        background-size:contain;
      }
    </style>
    <script>
      function getImage(){
        var file=evt.target.files;
        if (!file[0].type.match('image.*')){
          return 0;   //end function
        }
        var reader=new FileReader();
        /*reader.onload=function(){
          document.getElementById("background").src=reader.
        }*/
        reader.onload = (function() {
          return function(e) {
            document.getElementById("background").src=e.target.result;
          };
        })(file);
        reader.readAsDataURL(file);
      }
    </script>
  </head>
  <body>
    <div id="background"></div>
    <input type="file">Upload image</input>
  </body>
</html>