clear canvas html5? - Javascript Canvas

Javascript examples for Canvas:Example

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Description

clear canvas html5?

Demo Code

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<html>
   <head> 
      <meta name="viewport" content="width=device-width, initial-scale=1"> 
      <script type="text/javascript" src="https://code.jquery.com/jquery-1.11.0.js"></script> 
      <style id="compiled-css" type="text/css">

body {/*from  w ww  .  ja  v  a 2s .  c  om*/
   margin: 0px;
   padding: 0px;
}
#buttons {
   position: absolute;
   top: 5px;
   left: 10px;
}
#buttons > input {
   padding: 10px;
   display: block;
   margin-top: 5px;
}


      </style> 
      <script type="text/javascript">
    $(window).load(function(){
$(document).ready(function () {
    var canvas = document.getElementById('myCanvas');
    var context = canvas.getContext('2d');
    // begin custom shape
    context.beginPath();
    context.moveTo(170, 80);
    context.bezierCurveTo(130, 100, 130, 150, 230, 150);
    context.bezierCurveTo(250, 180, 320, 180, 340, 150);
    context.bezierCurveTo(420, 150, 420, 120, 390, 100);
    context.bezierCurveTo(430, 40, 370, 30, 340, 50);
    context.bezierCurveTo(320, 5, 250, 20, 250, 50);
    context.bezierCurveTo(200, 5, 150, 20, 170, 80);
    // complete custom shape
    context.closePath();
    context.lineWidth = 5;
    context.strokeStyle = 'blue';
    context.stroke();
    // bind event handler to clear button
    $("#clear").on('click', function () {
        context.clearRect(0, 0, canvas.width, canvas.height);
    });
});
    });

      </script> 
   </head> 
   <body> 
      <canvas id="myCanvas" width="578" height="200"></canvas> 
      <div id="buttons"> 
         <input type="button" id="clear" value="Clear"> 
      </div>  
   </body>
</html>

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