NotebookEvaluateAsModule

NotebookEvaluateAsModule[path_String | f_File]
NotebookEvaluateAsModule[notebook_RemoteNotebook]

imports WLJS notebook as an isolated module/library:

{exports} = NotebookEvaluateAsModule["mySecondNotebook.wln"];

This breaks the evaluation order. The caller cell will be evaluated last in the queue. Consider using the safer async version NotebookEvaluateAsModuleAsync instead.

The following rules apply:

Initialization cells are evaluated once for a given notebook object
The last Wolfram input cell is evaluated on every call and its result is exported
All other cells are ignored

This allows you to create reusable components using plain notebooks. For example:

Notebook-1.wln

Initialization cell

.wlx
BigHeader[Text_String] := <h1><Text/></h1>;

Last cell

{BigHeader}

Then in the host notebook we can import the result of the previous notebook as a component:

Notebook-2.wln

Cell 1

{HeaderComponent} = NotebookEvaluateAsModule["Notebook-1.wln"];

Cell 2

.slide

<HeaderComponent>Here is my presentation</HeaderComponent>

Hi there!