Скачать или смотреть How to Create Dynamic Branching Questions Using Inquirer in JavaScript

Discover how to create branching questions with the `inquirer` package in JavaScript and ensure your command-line application responds dynamically to user input.
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This video is based on the question https://stackoverflow.com/q/61691283/ asked by the user 'user79140' ( https://stackoverflow.com/u/13502803/ ) and on the answer https://stackoverflow.com/a/64360125/ provided by the user 'George F' ( https://stackoverflow.com/u/13496444/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Creating Dynamic Branching Questions with Inquirer

When building command-line interfaces, one common requirement is the ability to ask questions that depend on previous answers. For example, if you're inquiring about an employee's title, the follow-up questions might vary based on whether that title is "Engineer" or "Intern". So how do you achieve this with the inquirer library in JavaScript?

In this guide, we'll walk you through creating dynamic branching questions using inquirer, ensuring your application behaves as expected based on user input.

Understanding the Problem

You’ve set up your inquirer questions but ran into an issue: the follow-up questions for either the GitHub username or the school never displayed. This is a common issue that can occur due to a few mistakes in the implementation.

For clarity, let’s take a look at the basic structure of your question setup:

[[See Video to Reveal this Text or Code Snippet]]

Solution: Fixing the Branching Logic

There are two main reasons why the follow-up questions might not appear as expected. Let's explore them:

1. Check the Variable Name

You are using input.role to determine which follow-up question to ask, but you never defined role. Instead, you should reference the name of the previous question, which is input.employeeTitle.

Corrected Example:

[[See Video to Reveal this Text or Code Snippet]]

2. Expanding the Conditional Function

If adjusting the variable name doesn’t solve the issue, consider expanding your conditional function slightly. The when method needs to take in the full answers hash and then return a boolean based on your conditions.

Expanded Function Example:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By making these adjustments, you enhance the interactivity of your command-line application. Users will now be prompted with relevant follow-up questions based on their initial responses, creating a more personalized experience.

The inquirer library allows for complex interactions with minimal setup, making it an excellent choice for building user-friendly command-line interfaces. Don’t hesitate to experiment further with more complex branching questions as you grow more comfortable with the library!

Happy coding!