• I thought it would be nice to have an example that would allow users to experiment with the results depending on the option when exporting.
• Rather than creating a new example, I added a feature to an existing example because it was appropriate.

Change type

• bugfix
• improvement
• feature
• api
• other

Test plan

• Unit tests
• End to end tests

Release notes

• I add new feature at export-canvas-as-image example.
  
  
• It is possible to open and close. It was placed so as not to affect the existing layout and drawing as much as possible.
• It can set opts: background, darkmode, padding, scale and Box's arg(x,y,w,h).
  • Background and darkmode are checkbox.
  • Padding, scale, box's arg are number input.
• I accidentally manipulated the script in root's package.json, but it was restored to its original state. Because I didn't know there was a script to run the example.
• Control component is implemented simply for DX.
• ⚠️ I haven't implemented preserveAspectRatio yet. I will implement it if necessary.
• ⚠️ If x, y, w, and h are only partially undefined in the box, no processing was performed. I thought it would be a good idea to check the results.