Reusing Computed Properties in Vuelidate: A Cleaner Approach to Form Validation

Описание: Discover how to create a single reusable computed property in Vuelidate for validating ZIP codes across multiple form sections. Optimize your code and enhance maintainability!
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This video is based on the question https://stackoverflow.com/q/65718915/ asked by the user 'hendy0817' ( https://stackoverflow.com/u/9859897/ ) and on the answer https://stackoverflow.com/a/65719128/ provided by the user 'Amaarockz' ( https://stackoverflow.com/u/11281152/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Reusing Computed Properties in Vuelidate: A Cleaner Approach to Form Validation

When building forms in Vue.js, especially with libraries like Vuelidate, managing state and validation can become cumbersome. Particularly in scenarios where a form contains multiple sections requiring similar validations, you might find yourself duplicating code unnecessarily. A common challenge many developers face is the desire to reuse computed properties for validations, which can simplify the logic and make your code more maintainable.

The Problem: Redundant Computed Properties

Let's say you have a form with multiple sections, each containing a ZIP code field that needs to be validated. You might find yourself creating distinct computed properties for each section, just like in the following code snippet:

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

This approach works, but leads to code duplication, making it harder to maintain. You might want a solution that allows for a single computed property that can handle the validations for either section efficiently.

The Solution: Parametrized Computed Properties

The good news is that you can create a single computed property that accepts a section identifier as a parameter. Here's how you can implement it:

Step 1: Create a Single Computed Property

You can define a computed property using an arrow function that takes a section as an argument. Your code will look like this:

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

Step 2: Call the Computed Property

To perform validation, call this computed property with the section's identifier:

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

Advantages of This Approach

Reduced Code Duplication: By using a single computed property, you avoid redundancy in your code.

Increased Maintainability: Changes to validation logic only need to be made in one place.

Improved Readability: Your code will become cleaner and easier to read, helping others (or even future you) understand the logic at a glance.

Conclusion

By leveraging a single computed property that accepts parameters, you can write cleaner code and improve the maintainability of your Vue.js forms that utilize Vuelidate. This approach not only streamlines the validation process but also helps reduce potential errors and enhances overall productivity when working with complex forms.

Embrace this technique to keep your code DRY (Don't Repeat Yourself) and elevate your Vue.js applications!