If it's lagging, try it on https://turbowarp.org/1388428892. Click on the app icons to create tabs. You can: 1) resize them by clicking and dragging the edges of the tabs; 2) delete them by clicking the red button; 3) minimize them by clicking the yellow button; or 4) expand them by clicking the green button.
This entire project was created by me, @JPedroti, with the exception of the rectangle-filling algorithm, which is a modified version of @-Rex-'s “Rectangle Filler”, available at https://scratch.mit.edu/projects/236128688/. If you would like to use my project, please mention me in the notes and credits. This project can be very useful for developing an operating system (OS). The SVG text was created using https://texttosvg.com/.
