Vue v-model Directive

Vue v-model Directive

It automatically keeps form inputs and Vue data in sync.

 What is Vue v-model Directive?

v-model creates a two-way connection between:

• Input field (UI) ↔ Vue data

1.  If the user types something → data updates
2.  If data changes → input updates automatically

 Basic Syntax

 Example 1: Text Input

•  Real-time binding

 Example 2: Textarea

 Example 3: Checkbox

Single Checkbox (Boolean)

Multiple Checkboxes (Array)

 Example 4: Radio Buttons

 Example 5: Select Dropdown

Single Select

Multiple Select

 Modifiers with v-model

1.lazy

Updates data after change event (not on every keystroke).

2.number

Automatically converts input to number.

3.trim

Removes extra spaces.

v-model with Forms

v-model with Custom Components

Internally works using:

• modelValue prop

• update:modelValue event

v-model vs v-bind + v-on

v-model is shorthand for:

 Common Mistakes

•  Using v-model on non-form elements
•  Forgetting data property initialization
•  Expecting v-model to work without reactivity

 Best Practices

•  Use v-model only for inputs & forms
•  Use modifiers for clean data
•  Prefer computed for derived values
•  Combine with validation logic

 Summary Table

 Conclusion

The v-model directive is the heart of Vue form handling.
It simplifies input management and enables clean, reactive, and user-friendly forms.