Vue input value default: Setting default values for input fields in Vue.js

Vue input value default

Introduction

When working with forms in Vue.js, we often need to set a default value for an input field. This default value can be pre-filled from the data object or can be set dynamically based on certain conditions. In this article, we will explore various ways to set the default value for a Vue input field.

Setting default value from data object

One of the simplest ways to set the default value for an input field in Vue is by binding it to a data property. We can define the default value in the data object and use the v-model directive to bind it to the input field. For example:

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In the above code, the input field will have the default value of «John Doe» as specified in the data object. Any changes made to the input field will automatically update the data property.

Setting default value dynamically

Sometimes, we may need to set the default value of an input field based on certain conditions or calculations. Vue provides us with the flexibility to compute the default value dynamically using computed properties or methods. Let’s see an example:

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In the above code, the default value of the input field is computed based on the `firstName` and `lastName` data properties. Any changes made to these properties will automatically update the default value of the input field.

Default value for checkboxes and radio buttons

Setting the default value for checkboxes and radio buttons in Vue is slightly different from input fields. Instead of using the `v-model` directive, we can use the `:checked` or `:value` bindings to set the default value. Here’s an example:

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In the above code, the checkbox will be checked by default as specified in the `defaultChecked` data property. Similarly, we can set the default value for radio buttons using the `:value` binding.

Conclusion

Setting the default value for Vue input fields is essential when working with forms. We can either bind the default value to a data property or compute it dynamically based on certain conditions. By understanding these techniques, we can effectively handle default values in Vue.js applications.

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