Create a linear gradient on the HTML5 canvas

Example of how you can create a linear gradient on the HTML5 canvas. 
<!DOCTYPE HTML>
<html>
  <head>
    <style>
      body {
        margin: 0px;
        padding: 0px;
      }
    </style>
  </head>
  <body>
    <canvas id="myCanvas" width="600" height="300"></canvas>
    <script>

    var canvas = document.getElementById('myCanvas'); 
    var ctx = canvas.getContext('2d'); 
    
    ctx.rect(0,0, canvas.width, canvas.height);
        
    var gradient = ctx.createLinearGradient(0, 0, canvas.width, canvas.height);
      
    gradient.addColorStop(0, '#FF0000');   
    gradient.addColorStop(1, '#0000FF');
        
    ctx.fillStyle = gradient;
    ctx.fill();

   </script>
  </body>
</html>
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