JSFiddle - React, Tailwind, and code Playground

by karthick6891

HTML

<canvas id="canvas"></canvas>
<canvas id="canvasEdited"></canvas>

JavaScript

var img = new Image();
      img.src = 'data:image/png;base64,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';
      var canvas = document.getElementById('canvas');
      var canvasEdited =  document.getElementById('canvasEdited');
      var ctx = canvas.getContext('2d');
      var arr = [];
      img.onload = function() {
          ctx.drawImage(img, 0, 0);
          
          var imageData = ctx.getImageData(0,0, canvas.width, canvas.height)

    		   editPixels(imageData.data);

           drawEditedImage( imageData);
     };
     
     function editPixels(imgData) {
              for (var i=0; i < imgData.length; i += 4) {
             		imgData[i] = imgData[i] - 100;
                imgData[i+1] = imgData[i+1] - 100;
                imgData[i+2] = imgData[i+2] - 100;
             }
     }
          
     function drawEditedImage(newData) {
         var ctxEdited = canvasEdited.getContext('2d');
         ctxEdited.putImageData(newData, 0, 0);
     }