How to get the size of this background when using multi artboards?

[LoveYou阿逗逼6666]

And what is the name of the background? Can I get the coordinate of the background?

[Sergey Osokin]

It's a canvas. The default maximum canvas size in Illustrator is 227 x 227 inches, or 16,383 pixels. Its coordinates are [-7711, 7911, 8672, -8472].

[LoveYou阿逗逼6666]

How to get the maximum canvas size by jsx?

[Sergey Osokin]

The size of the canvas is always fixed. Tell me what your task is. Because I don't understand your question yet.

[仕杰30602999jmj4]

sir how can i get the canvas size by jsx     example [-1000, 1000 , 1000 ,-1000 ]

[Sergey Osokin]

You mean these canvas coordinates [-7711, 7911, 8672, -8472]? Want to know where they were calculated?