How to Check Inputted Values Against JSON Data in BootstrapVue

Описание: Learn how to verify user input in your `BootstrapVue` application by comparing it with information stored in a JSON file. Create interactive forms with a fully functional validation approach.
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This video is based on the question https://stackoverflow.com/q/69481202/ asked by the user 'patrick96' ( https://stackoverflow.com/u/16867612/ ) and on the answer https://stackoverflow.com/a/69483458/ provided by the user 'StevenSiebert' ( https://stackoverflow.com/u/13129353/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Validating User Input in BootstrapVue: A Step-by-Step Guide

When working with forms in Vue.js, especially while using libraries like BootstrapVue, it’s essential to ensure that user input matches existing data. This not only enhances user experience but also ensures that the application processes valid entries. In this post, we will address a specific challenge: verifying whether an inputted ID corresponds to a name using data from a JSON file.

The Problem

Imagine you have a form where a user’s name is autofilled based on certain criteria, and you want the user to enter their ID in another input field. The goal is to ensure that the ID matches the ID associated with the name in your data array. If the validation is successful, a button should be enabled to proceed with login. This is the essence of the challenge faced by many developers working with forms in Vue.js.

The Solution

Step 1: Update Your Template

To tackle this, we will make a few adjustments to your form template. The key changes will involve binding the user’s input to a data model and setting up a method to validate the input.

Here’s the updated template code:

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

Key Changes:

New Data Binding: Added a property v-model="this.Number" for the ID input, which holds the user’s input.

Validation Trigger: The validation function validDataAdded is called on keyup in the ID input field.

Step 2: Update Your Script

Next, we need to modify your Vue component’s script section. Two new data properties will be added: disabledButton which determines if the button should be enabled, and Number which holds the user’s input.

Here’s how the updated script would look:

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

Explanation of Changes:

Functionality: The validDataAdded function loops through the data array to compare the entered name and number. If a match is found, it sets disabledButton to true, allowing the user to click the login button.

Initial State: The button starts off disabled by setting disabledButton to false initially.

Conclusion

With these enhancements, your BootstrapVue form is now equipped to validate user inputs effectively. Whenever a user inputs their ID, it will automatically verify against the JSON data based on the corresponding name, ensuring that only valid entries can proceed to the next stage. This not only improves data integrity but also fortifies the overall user experience.

Feel free to integrate this logic into your project and customize as needed to fit your needs. Happy coding!