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HTML <canvas> height 属性

❮ HTML <canvas> 标签

示例

一个 <canvas> 元素,高度和宽度为 200 像素

<canvas id="myCanvas" width="200" height="200" style="border:1px solid">
试试看 »

更多“试试看”示例如下。


定义和用法

height 属性以像素为单位指定 <canvas> 元素的高度。

提示:使用 <code class="w3-codespan">width 属性以像素为单位指定 <code class="w3-codespan"><canvas> 元素的宽度。

提示:每次重新设置画布的高度或宽度时,画布内容都会被清除(请参见页面底部的示例)。

提示:在我们的 HTML Canvas 教程 中了解有关 <code class="w3-codespan"><canvas> 元素的更多信息。


浏览器支持

表中的数字指定完全支持该属性的第一个浏览器版本。

属性
height 4.0 9.0 2.0 3.1 9.0

语法

<canvas height="pixels">


属性值

描述
pixels 以像素为单位指定画布的高度(例如“100”)。默认值为 150

更多示例

示例

通过将高度属性设置为 300px(使用 JavaScript)来清除画布

<canvas id="myCanvas" width="200" height="200" style="border:1px solid"></canvas>

<script>
let c = document.getElementById("myCanvas");
let ctx = c.getContext("2d");
ctx.fillStyle = "#92B901";
ctx.fillRect(50, 50, 100, 100);

function clearCanvas() {
  c.height = 300;
}
</script>
试试看 »

❮ HTML <canvas> 标签
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