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HTML: <template> tag

Atributo shadowOffsetY do HTML canvas

shadowOffsetY é uma propriedade do Canvas 2A API D descreve a propriedade de distância vertical da sombra.

HTML canvas reference manual

Exemplo online

Desenhar uma sombra na parte inferior do retângulo2retângulo de 0 pixel:

Uso do atributo shadowOffsetY:

Exemplo

!DOCTYPE html>
<html>
<head>
<title>Uso do atributo shadowOffsetY do HTML canvas (Tutorial básico da Web oldtoolbag.com)</title>
</head>
<body>
<canvas id="myCanvas" width="300" height="150" style="border:1px sólido #d3d3d3>
Seu navegador não suporta　HTML5　canvas　tag.
</canvas>
<script>
var　c=document.getElementById("myCanvas");
var　ctx=c.getContext("2d");
ctx.shadowBlur=10;
ctx.shadowOffsetY=20;
ctx.shadowColor="black";
ctx.fillStyle="red";
ctx.fillRect(20,20,100,80);
</script>
</body>
</html>

Test see ‹/›

Browser compatibility

IEFirefoxOperaChromeSafari

Internet Explorer 9Firefox, Opera, Chrome and Safari support the shadowOffsetY attribute.

Note:Internet Explorer 8 and earlier versions do not support the <canvas> element.

Definition and usage

The shadowOffsetY attribute sets or returns the vertical distance between the shadow and the shape.
shadowOffsety = 0 indicates that the shadow is exactly behind the shape.
shadowOffsetY = 20 indicates that the shadow starts below the top position of the shape20 pixels.
shadowOffsetY =-20 indicates that the shadow starts above the top position of the shape20 pixels.

Tip:To adjust the horizontal distance between the shadow and the shape, use shadowOffsetX Attribute.

Default value:	0
JavaScript syntax:	context.shadowOffsetY=number;

Attribute value

Value	Description
number	Positive or negative value, defines the vertical distance between the shadow and the shape.

HTML canvas reference manual

HTML: <template> tag