Element attribute watching or binding?

[deng232]

I want a canvas overlay on an image; therefore, I need the canvas size response to the image or image container's size change after the image being loaded.

is there any build in way to do it?

[ekwoka]

using CSS, have a 1x1 css grid, and set both children (image and canvas) to be on that 1 cell. They will naturally share size pressures, and be stacked.

[deng232]

I have tried css before, it will enlarge the pixel in the canvas rather than increase the amount of pixels

[ekwoka]

Well, you could use like a resize observer on it.