How to Compare Query Strings with User Input in Vue.js

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The Problem Explained

Imagine you are working on a login feature for your application. The user accesses your application via a URL that contains a query string. For example:

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

Your objective is to enable a login button only if the key provided in this query string matches the key associated with a user ID selected from a dropdown. If the keys don’t match, the button should remain disabled.

Here’s a summary of the steps required to implement this logic:

Extract the query string key from the URL.

Retrieve the user-selected ID's corresponding key from your JSON data.

Compare the two keys and enable the button if they match.

Implementing the Solution

Below is a step-by-step approach to tackle this problem.

Step 1: Extract the Query String Key

In your mounted() lifecycle hook, you can capture the key from the URL as follows:

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

Step 2: Retrieve the Key Based on User ID

You need to check the selected ID against your JSON data. This data could be structured as follows:

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

Step 3: Compare the Keys

To determine if the button should be enabled, you can use a method to compare the keys. Here’s how to set it up:

First, add a method in your component that checks the validity of the data:

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

Putting It All Together

Now integrate the button with the method to control its state based on the matching keys. Update your button definition as follows:

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

Conclusion

Feel free to implement this logic in your own projects and customize it as necessary. Happy coding!