Скачать или смотреть Overcoming Dynamic Binding Challenges with v-model in Vue.js

Learn how to dynamically bind `v-model` to computed properties in Vue.js without losing the setter functionality to create responsive and interactive forms.
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This video is based on the question https://stackoverflow.com/q/64025156/ asked by the user 'Kenneth' ( https://stackoverflow.com/u/6324800/ ) and on the answer https://stackoverflow.com/a/64026084/ provided by the user 'Michal Levý' ( https://stackoverflow.com/u/381282/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Overcoming Dynamic Binding Challenges with v-model in Vue.js

Working with Vue.js often involves using v-model for two-way data binding between your components and your application state. However, you may encounter a situation where you want to dynamically bind v-model to a computed property within a loop. This post will discuss a common issue and provide a simple yet effective solution to ensure you maintain the setter functionality of the computed properties, allowing for responsive forms.

The Problem: Loss of Setter Functionality in Computed Properties

Imagine you have a component in which you want to iterate over multiple form fields. In your mind, you envision binding each field to a computed property so that each input remains synced with the application state. However, upon implementation, you notice a crucial detail: when you use step.model to reference your computed property, the setter don't get called.

Example of the Issue

Here's a brief overview of how you may have structured your code initially:

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While you might expect the setter to work when utilizing step.model, what actually happens is that only the getter is invoked, retrieving the value without the setter being triggered.

The Solution: Dynamically Accessing Computed Properties

To overcome this challenge, we need to adjust how we access the computed property. You’ll want to create a method that allows you to refer to the computed property dynamically. Here's how to do it:

Step-by-step Breakdown:

Use a String Reference Instead of Direct Assignment:

Instead of assigning this.acquiredPrice directly, store the name of the property as a string. For example:

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Create a Method to Access the Computed Property:

Implement a method in your component that will return this when called. This way, the template will have access to the entire context of your Vue instance.

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

Adjust Your Template:

In your template, bind the v-model of the field to the computed property using the method we created:

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

The Complete Code Solution

Bringing all of this together, here is the complete example:

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Conclusion

By applying this approach, you can effectively bind v-model dynamically to computed properties within a loop without losing the setter functionality. This method enables a seamless interaction within your Vue.js application, allowing for dynamic, two-way data binding that keeps your user interface in sync with the underlying data model.

Feel free to use this strategy in your Vue projects and watch how easily you can handle dynamic forms in Vue.js!