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Importing and Exporting items

Explore exporting and importing JavaScript classes, functions, and objects in React to enable effective UI testing. This lesson explains how to set default and named exports, manage relative import paths, and prepare code for testing with tools like Jest and Storybook.

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To write tests for a particular JavaScript file, the items being tested in that file must be accessible from the testing file. This means that the source file must export them, and the test file must import them.

Exporting items

The last line in a JavaScript file often specifies the default export, which is what gets exported if no item is explicitly ...