我們的志工尚未將此文章翻譯為 正體中文 (繁體) 版本。加入我們，幫忙翻譯！
The CanvasGradient interface represents an opaque object describing a gradient. It is returned by the methods CanvasRenderingContext2D.createLinearGradient() or CanvasRenderingContext2D.createRadialGradient().
Properties
Representing an opaque object, there is no exposed property.
Methods
There is no inherited method.
CanvasGradient.addColorStop()- Adds a new stop, defined by an
offsetand acolor, to the gradient. If the offset is not between0and1anINDEX_SIZE_ERRis raised, if the color can't be parsed as a CSS<color>, aSYNTAX_ERRis raised.
Specifications
| Specification | Status | Comment |
|---|---|---|
| WHATWG HTML Living Standard The definition of 'CanvasGradient' in that specification. |
Living Standard |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 4.0 | 3.6 (1.9.2) [1] | 9.0 | 9.0 | 3.1 |
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | 2.1 | 1.0 (1.9.2) [1] | ? | 10.0 | 3.2 |
[1] Before Gecko 5.0, (Firefox 5.0 / Thunderbird 5.0 / SeaMonkey 2.2), specifying non-finite values when adding color stops through a call to addColorStop() incorrectly throws SYNTAX_ERR instead of INDEX_SIZE_ERR.
See also
- Creator methods in
CanvasRenderingContext2D. - The
<canvas>element and its associated interface,HTMLCanvasElement.