New Moto Guzzi Door Mats Available Now
laptop or desktop computer?
Desktop. I do worse on a laptop!
Depending on your browser and operating system, try "Edit->Undo", or control-Z (windows, Linux), command-Z if on a Mac.
You can left click and mouse over to highlight the text, right click, and hit "copy" occasionally, to put it into the buffer. Later if you lose it, you can use the "paste" feature to put back what you copied.
Click on the back arrow in the browser. For some errors it will recover all your work.