Salesforce JavaScript Developer Practice Exam

How would you alias msg1 as msg3 in the module import example: import { msg2, msg1 } from './module2.js'; printMsg(msg1 + msg2);?

1. import { msg2, msg1 as msg3 } from './module2.js';

2. import { msg2, msg3 } from './module2.js';

3. import { msg3, msg2 } from './module2.js';

4. import { msg1, msg2 as msg3 } from './module2.js';

The correct answer is: import { msg2, msg1 as msg3 } from './module2.js';

The correct choice aliases `msg1` as `msg3`, allowing you to use `msg3` in your code wherever `msg1` was previously used. This is accomplished using the `as` keyword in the import statement. In the provided import statement, specifying `msg1 as msg3` means that you are renaming `msg1` during the import. Thus, within the current module, you can now refer to `msg1` as `msg3`. The functionality remains the same, but you've just created a new reference to the original `msg1` under a different name. This technique is particularly useful if you want to avoid naming conflicts or clarify the purpose of the variable within your code context. The other options do not achieve the same result. Some might import variables but without renaming `msg1` to `msg3`, while others could lead to variable name conflicts or fail to import `msg1` entirely. Therefore, option A is the only choice that accurately implements the aliasing of `msg1` as `msg3`.