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画布 shadowBlur 属性

❮ 画布参考

示例

绘制一个红色矩形,带有黑色阴影,模糊程度为 20

你的浏览器不支持 HTML5 canvas 标签。

JavaScript

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

ctx.shadowBlur = 20;
ctx.shadowColor = "black";
ctx.fillStyle = "red";
ctx.fillRect(20, 20, 100, 80);
亲自试试 »

描述

shadowBlur 属性设置或返回阴影的模糊程度。

默认值为 0。

另请参阅

shadowColor 属性(设置阴影颜色)

shadowOffsetX 属性(设置阴影 x 位置)

shadowOffsetY 属性(设置阴影 y 位置)

fillRect() 方法(绘制一个填充矩形)

fillStyle 属性(设置填充颜色/样式)


语法

context.shadowBlur = number

属性值

描述 演示
number 阴影模糊程度 演示 »

浏览器支持

<canvas> 元素是 HTML5 标准(2014 年)。

shadowBlur 在所有现代浏览器中都受支持

Chrome Edge Firefox Safari Opera IE
9-11

❮ 画布参考
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