ojs_define() in Quarto Book to define variable in all chapters

[rgaiacs]

Related to #3568

Zip file with minimal working example

Consider a project that has one chapter as

# Summary

```{ojs}
1 + 1
```

Key fact is ${key_fact}

and another chapter as

# Methods

```{r}
key_fact <- 1 + 1
ojs_define(key_fact = key_fact)
```

At the moment, Observable's ${key_fact} silent fails because the variable is only defined in one file.

Will be great if Quarto allows the option to globally define the variable across a book.

[cscheid]

Use imports across pages instead:

foo.qmd

```{ojs}
x = 1
```

bar.qmd

```{ojs}
import { x } from "./foo.qmd";
```

That should work.

[rgaiacs]

Thanks! Works for me.

[mcanouil]

(Changing this to "Q&A")