Chapter 9

Here are the solutions to the ​Exercises​ for the Chapter 9, ​Using Modules​ chapter.

Exercise 1

1. false. Each module is loaded at most once in the execution flow.

2. false. No; to export as default, we need to place the keyword default. Inlined export creates a named export.

3. false. The importing module provides names for the defaults, so there are no conflicts.

4. true. Inline exports are less verbose than explicit exports.

5. false. A module may have at most one default export, but it may have any number of nondefault exports.

Exercise 2

Use explicit import when you want to export

1. only select variables from multiple declarations

2. a variable with a different name than its declared name

Exercise 3

The importing module sees the name of the default exported item as default, but the importing module may assign whatever name it likes for that item.

Exercise 4

The module that has the code

will reexport all exports, except the default export, from the module named some-module. The module that imports the exporting module will be able to see all the exported items (except default) from some-module without a direct import to some-module.

Exercise 5

Let’s pick a name, deliver, for the default item exported by fasttrack and give a namespace fasttrack for housing the items exported by the module fasttrack. Here’s the code to import that module: