Details about the format, quality, area and scale of a captured image.
Values of this type are objects. They contain the following properties:
format
可选
extensionTypes.ImageFormat
. The format of the resulting image. Default is
"png"
.
quality
可选
integer
. When format is
"jpeg"
, this controls the quality of the resulting image. It is a number between 0 and 100, which is converted to a value between 0 and 1 and then used as the
encoderOptions
自变量对于
HTMLCanvasElement.toDataURL()
. If it is omitted, 92 is used. As quality is decreased, the resulting image will have more visual artifacts, and the number of bytes needed to store it will decrease. This value is ignored for PNG images.
rect
可选
An
对象
specifying the area of the document to capture, in CSS pixels, relative to the page. All properties default to
0
. The properties are:
x
: The coordinate of the left side of the rectangle.
y
: The coordinate of the top side of the rectangle.
width
: The width of the rectangle.
height
: The height of the rectangle.
This option was introduced in Firefox 82. If omitted, the currently visible viewport is captured.
scale
可选
编号
. The scale to render at, defaults to
devicePixelRatio
. This option was introduced in Firefox 82.
BCD tables only load in the browser
注意：
This API is based on Chromium's
chrome.extensionTypes
API. This documentation is derived from
extension_types.json
in the Chromium code.
Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.
最后修改： , 由 MDN 贡献者