CanvasRenderingContext2D.fillStyle

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句法
范例
规范
浏览器兼容性
另请参阅
相关话题

CanvasRenderingContext2D .fillStyle 特性为 Canvas 2D API specifies the color, gradient, or pattern to use inside shapes. The default style is #000 (黑色)。

For more examples of fill and stroke styles, see Applying styles and color 在 Canvas tutorial .

句法

ctx.fillStyle = color;
ctx.fillStyle = gradient;
ctx.fillStyle = pattern;

选项

color: DOMString parsed as CSS <color> 值。
gradient: CanvasGradient object (a linear or radial gradient).
pattern: CanvasPattern object (a repeating image).

范例

Changing the fill color of a shape

This example applies a blue fill color to a rectangle.

HTML

<canvas id="canvas"></canvas>

JavaScript

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
ctx.fillStyle = 'blue';
ctx.fillRect(10, 10, 100, 100);

结果

Creating multiple fill colors using loops

In this example, we use two for loops to draw a grid of rectangles, each having a different fill color. To achieve this, we use the two variables i and j to generate a unique RGB color for each square, and only modify the red and green values. (The blue channel has a fixed value.) By modifying the channels, you can generate all kinds of palettes.

<canvas id="canvas" width="150" height="150"></canvas>

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
for (let i = 0; i < 6; i++) {
  for (let j = 0; j < 6; j++) {
    ctx.fillStyle = `rgb(
        ${Math.floor(255 - 42.5 * i)},
        ${Math.floor(255 - 42.5 * j)},
        0)`;
    ctx.fillRect(j * 25, i * 25, 25, 25);
  }
}

结果看起来像这样:

Screenshot	Live sample

规范

规范	状态	注释
HTML 实时标准 The definition of 'CanvasRenderingContext2D.fillStyle' in that specification.	实时标准

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`fillStyle`	Chrome Yes	Edge 12	Firefox 1.5	IE Yes	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 4	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持

WebKit/Blink-specific note

In WebKit- and Blink-based browsers, the non-standard and deprecated method ctx.setFillColor() is implemented in addition to this property.

setFillColor(color, optional alpha);
setFillColor(grayLevel, optional alpha);
setFillColor(r, g, b, a);
setFillColor(c, m, y, k, a);

另请参阅

画布 API
The interface defining this property: CanvasRenderingContext2D
Values used by this property:
- <color> CSS 数据类型
- CanvasGradient 对象
- CanvasPattern 对象

元数据

最后修改： 2019 年 3 月 23 日

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句法

选项

范例