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We’re still writing more documentation, but there’s a bit more detail here (and I’ll be posting more soon): https://beta.observablehq.com/@mbostock/introduction-to-code

To summarize, the body of a cell is typically either an expression or a block statement, akin to the body of an arrow function. If a cell starts with name = …, then it has a name and can be referenced by other cells. So, the name = part is specific to Observable, but the expression and block statement is normal JavaScript.

The import declaration is similar to a normal static ES import, but the with clause allows you to inject local definitions into the imported notebook.



I got a little tripped up because I tried to assign a literal object to a name.

e.g.

    name = { foo: 1 }
doesn't work. I ended up doing:

    name = { return { foo: 1} }
but after your explanation, I guessed that this would also work:

    name = ({ foo: 1})


Yep!




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