The shadowBlur property

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[No canvas support]
An example of the shadowBlur property

This sets the amount of blurring that the shadow has. In conjunction with the clip function and setting the offet X/Y values to 0 you can achieve inner shadows:


An example

<script>
    window.onload = function ()
    {
        var canvas  = document.getElementById("cvs");
        var context = canvas.getContext('2d');

        var x       = 50;
        var y       = 50;
        var width   = 100;
        var height  = 100;
    
        context.shadowColor = '#ccc';
        context.shadowOffsetX = 3;
        context.shadowOffsetY = 3;
        context.shadowBlur = 25;
    
        context.fillStyle = 'red';    
        context.fillRect(x, y, width, height);
    }
</script>

See also

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