Скачать или смотреть How to Show Initial v-model Value in Vue.js Selectbox

Learn how to set and display an initial value in a selectbox using Vue.js v-model.
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This video is based on the question https://stackoverflow.com/q/71920297/ asked by the user 'marjan' ( https://stackoverflow.com/u/18688751/ ) and on the answer https://stackoverflow.com/a/71920406/ provided by the user 'vineeth pappu' ( https://stackoverflow.com/u/13277400/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Show Initial v-model Value in Vue.js Selectbox

When working with forms in Vue.js, particularly with selectboxes, one common challenge developers face is displaying the initial value of a v-model binding. If you've ever struggled with getting a default selection to show up correctly in your selectbox, you're not alone! In this guide, we’ll explore how to effectively set up your selectbox to show the desired initial value using Vue.js.

Understanding the Problem

The Vue.js framework enables smooth two-way data binding using v-model, which is commonly used for form inputs like selectboxes, input fields, and checkboxes. However, ensuring that a specific option is displayed when the component first renders can be unintuitive if not approached correctly.

For instance, consider an application where you want to set a default duration for a record, such as "2 min". If the component is not configured correctly, you might end up with an empty selectbox or a different value being shown.

Solution: Setting Up the Selectbox

To set an initial value in the selectbox, you need to ensure that the v-model is bound to the id of the default option you want to display, not the name. Here's how to do it step-by-step.

Step 1: Define Your Data Structure

In your Vue instance, you should have a data structure that includes the initial value for your selectbox. Here’s an example:

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

Step 2: Create the Selectbox in HTML

Now let’s create the selectbox in the HTML. Here, you will bind the v-model directly to newRecordDurationName:

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

Key Points to Remember

Use id for v-model: Make sure the value of the v-model in the data object corresponds to the id of the option you want selected. For example, if you want "2 min" to be selected by default, set newRecordDurationName to 1.

Rendering Options: Use a v-for directive to render your options dynamically from the recordDuration array.

Two-Way Binding: The selectbox and the Vue instance maintain a two-way binding, meaning any change to the selectbox will update the value of newRecordDurationName and vice versa.

Conclusion

With these steps, you can easily display the initial value in a Vue.js selectbox. Properly setting the v-model to match the id of the desired default option will ensure your selectbox reflects the intended starting value. This setup not only improves user experience but also ensures your form behaves as expected right from the start.

Feel free to reach out if you have any questions or need further clarification on this topic!