--- title: HTMLCanvasElement slug: Web/API/HTMLCanvasElement tags: - API - Canvas - HTML DOM - Interface - NeedsTranslation - Reference - TopicStub translation_of: Web/API/HTMLCanvasElement ---
Интерфейс HTMLCanvasElement
предоставляет свойства и методы для управления расположением и представлением элеметов canvas. Он также наследует свойства и методы интерфейса {{domxref("HTMLElement")}}.
Наследуются от родителя, {{domxref("HTMLElement")}}.
— 150
.— 300
.function
that is Initially null, Web content can set this to a JavaScript function that will be called if the page is printed. This function can then redraw the canvas at a higher resolution that is suitable for the printer being used. See this blog post.Наследуются от родителя, {{domxref("HTMLElement")}}.
"2d"
возвращает объект {{domxref("CanvasRenderingContext2D")}}, тогда так вызов с параметром "experimental-webgl"
(или "webgl"
) возвращает объект {{domxref("WebGLRenderingContext")}}. Этот контекст поддерживается толко в браузерах, в которых реализован WebGL.type
(по умолчанию png
). Возвращаемая картинка имеет разрешение 96dpi.name
. Если тип не указан, используется image/png
.Specification | Status | Comment |
---|---|---|
{{SpecName('Media Capture DOM Elements', '#html-media-element-media-capture-extensions', 'HTMLCanvasElement')}} | {{Spec2('Media Capture DOM Elements')}} | Adds the method captureStream() . |
{{SpecName('HTML WHATWG', "#the-canvas-element", "HTMLCanvasElement")}} | {{Spec2('HTML WHATWG')}} | The method getContext() now returns a {{domxref("RenderingContext")}} rather than an opaque object .The methods probablySupportsContext() , setContext() and transferControlToProxy() have been added. |
{{SpecName('HTML5.1', "scripting-1.html#the-canvas-element", "HTMLCanvasElement")}} | {{Spec2('HTML5.1')}} | |
{{SpecName('HTML5 W3C', "scripting-1.html#the-canvas-element", "HTMLCanvasElement")}} | {{Spec2('HTML5 W3C')}} | Initial definition. |
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support (2D context) |
4.0 | {{CompatGeckoDesktop('1.9.2')}} | 9.0 | 9.0 [1] | 3.1 |
toBlob() |
50 | {{CompatGeckoDesktop('19')}} [2] | {{CompatUnknown}} | {{CompatUnknown}} | {{CompatNo}} (bug 71270) |
probablySupportsContext() ,setContext() ,transferControlToProxy() {{experimental_inline}} |
{{CompatNo}} | {{CompatNo}} | {{CompatNo}} | {{CompatNo}} | {{CompatNo}} |
mozGetAsFile() {{non-standard_inline}} {{deprecated_inline}} |
{{CompatNo}} | {{CompatGeckoDesktop('2')}} | {{CompatNo}} | {{CompatNo}} | {{CompatNo}} |
captureStream() {{experimental_inline}} |
{{CompatNo}} | {{CompatGeckoDesktop('41')}} | {{CompatNo}} | {{CompatNo}} | {{CompatNo}} |
transferControlToOffscreen() {{experimental_inline}} |
{{CompatNo}} | {{CompatGeckoDesktop(44)}} [3] | {{CompatNo}} | {{CompatNo}} | {{CompatNo}} |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support (2D context) |
2.1 | {{CompatVersionUnknown}} | {{CompatVersionUnknown}} | {{CompatUnknown}} | 10.0 [1] | 3.2 |
webgl context |
{{CompatUnknown}} | {{CompatUnknown}} | {{CompatVersionUnknown}} as experimental-webgl |
{{CompatUnknown}} | {{CompatUnknown}} | {{CompatUnknown}} |
toBlob() |
{{CompatNo}} (bug 67587) | 50 | {{CompatGeckoMobile('18')}} [2] | {{CompatUnknown}} | {{CompatUnknown}} | {{CompatNo}} (bug 71270) |
probablySupportsContext() ,setContext() ,transferControlToProxy() {{experimental_inline}} |
{{CompatNo}} | {{CompatNo}} | {{CompatNo}} | {{CompatNo}} | {{CompatNo}} | {{CompatNo}} |
mozGetAsFile() {{non-standard_inline}} {{deprecated_inline}} |
{{CompatNo}} | {{CompatNo}} | {{CompatGeckoMobile('2')}} | {{CompatNo}} | {{CompatNo}} | {{CompatNo}} |
captureStream() {{experimental_inline}} |
{{CompatNo}} | {{CompatNo}} | {{CompatGeckoMobile('41')}} | {{CompatNo}} | {{CompatNo}} | {{CompatNo}} |
transferControlToOffscreen() {{experimental_inline}} |
{{CompatNo}} | {{CompatNo}} | {{CompatGeckoMobile(44)}} [3] | {{CompatNo}} | {{CompatNo}} | {{CompatNo}} |
[1] Opera Mini 5.0 and later has partial support.
[2] Support for the third parameter, has been added in Gecko 25 only: when used with the "image/jpeg"
type, this argument specifies the image quality.
[3] This feature is behind a feature preference setting. In about:config, set gfx.offscreencanvas.enabled
to true
.