What is it?
Sandbox lets you test, save, and share snips of javascript. Put your code in the top box, click run,
and view the output using using one of the output boxes: x,y,z, or the html div h.
Use export to backup or share your code.
You can use PRINT to set the output, or ECHO to append the output: ECHO expression;
you can drag and drop files into any of the boxes
Eval enviroment variables
CODE,IN,OUT,DATA,HTML: all use .value to set, normal variable to read.