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Welcome to the MetaScript wiki! For now, the wiki contains a few non-trivial insights on writing meta.

Short statements

//? if (NODE)
buffer.writeInt8(offset, value);
//? else
view.setInt8(value, offset);

This will actually work without using curly braces because each source line is wrapped by a dedicated write(...) call, resulting in the following meta program:

if (NODE)
  write('buffer.writeInt8(offset, value);\n');
else
  write('view.setInt8(value, offset);\n');

The __ variable

When inspecting the generated meta program, you will notice that the variable __ is used quite frequently. It stores the indentation level of the last meta block processed. For example ...

//? if (NODE)
    //? include("node-stuff.js");
//? else
    //? include("browser-stuff.js");

... will indent the contents of the included filesby four spaces (just like before //?), while ...

/*? if (NODE)
    include("node-stuff.js");
else
    include("browser-stuff.js"); */

will not, just like before /*?. When creating custom utility functions, it's of course safe to use this variable on your own.