CanvasRenderingContext2D.shadowOffsetY
CanvasRenderingContext2D
.shadowOffsetY
是 Canvas 2D API 描述阴影垂直偏移距离的属性。
语法
示例
使用 shadowOffsetY
属性
这是一段简单的代码片段,使用 shadowOffsetY
属性绘制阴影垂直偏移量。注意:将shadowColor属性设置成不透明,阴影才会被绘制。
HTML
<canvas id="canvas"></canvas>
JavaScript
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
ctx.shadowColor = "black";
ctx.shadowOffsetY = 10;
ctx.shadowBlur = 10;
ctx.fillStyle = "green";
ctx.fillRect(10, 10, 100, 100);
修改下面的代码并在线查看 canvas 的变化:
规范描述
Specification | Status | Comment |
---|---|---|
HTML Living Standard CanvasRenderingContext2D.shadowOffsetY |
Living Standard |
浏览器兼容性
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Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |