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CanvasRenderingContext2D.shadowOffsetX

CanvasRenderingContext2D.shadowOffsetX 是 Canvas 2D API 描述阴影水平偏移距离的属性。

Syntax

ctx.shadowOffsetX = offset;
offset
阴影水平偏移距离的float类型的值。默认值是 0。 负数、 Infinity 或者NaN都会被忽略。

示例

使用 shadowOffsetX 属性

这是一段简单的代码片段,使用 shadowOffsetX 属性设置阴影的水平偏移量。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.shadowOffsetX = 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
WHATWG HTML Living Standard
CanvasRenderingContext2D.shadowOffsetX
Living Standard  

浏览器兼容性

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)

参见

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