We can create a blob of an image, an image part, or even make a page screenshot. i find references to apex 4. a blob object represents a chuck of bytes that holds data of a file. for example, you can construct a blob containing the data for an image, use url. but a blob is not a reference to a actual file.
mdn will be in maintenance mode on wednesday october 2, from 5 pm to 8 pm pacific ( in utc, thursday october 3, midnight to 3 am) while we upgrade our servers. i want to offer the possibility to download the generated image. src to display the image you created without talking to a server.
call canvas method. blobparts は blob/ buffersource/ string の値の配列です; options オプションのオブジェクト: type – blob タイプ, 通常は例えば image/ png のような mime タイプです, endings – blob が現在の os の改行( \ r\ n or \ n) に対応するように行末. once you have a web app that can generate a limited scope sas token, the rest is easy! the good tricks of the canvas technique are resizing, changing format, adding simple captions and getting the first frame of an animated gif.