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画布 shadowOffsetY 属性

❮ 画布参考

示例

绘制一个阴影矩形,阴影位于矩形顶部位置下方 20 像素处

您的浏览器不支持 HTML5 画布标签。

JavaScript

const canvas = document.getElementById("myCanvas");
const ctx = canvas.getContext("2d");
ctx.shadowBlur = 10;

ctx.shadowOffsetY = 20;
ctx.shadowColor = "black";
ctx.fillStyle = "red";
ctx.fillRect(20, 20, 100, 80);
自己尝试 »

描述

shadowOffsetY 属性设置或返回阴影在形状上的垂直距离。

默认值为 0。

描述
0阴影位于形状的正后方
20阴影从形状顶部下方 20 像素开始
-20阴影从形状顶部上方 20 像素开始

另请参阅

shadowOffsetX 属性(设置阴影 x 位置)

shadowColor 属性(设置阴影颜色)

shadowBlur 属性(设置阴影模糊度)

fillRect() 方法(绘制填充矩形)

fillStyle() 属性(设置填充颜色/样式)


语法

context.shadowOffsetY = number

属性值

描述 播放它
number 阴影在形状上的垂直距离 播放它 »

浏览器支持

<canvas> 元素是 HTML5 标准(2014 年)。

shadowOffsetY 在所有现代浏览器中受支持

Chrome Edge Firefox Safari Opera IE
9-11

❮ 画布参考
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