Vue JS Forms and Validation

Question 1

How does `v-model` work on a `<textarea>` element in Vue 3?

Accepted Answer

It binds the textarea's value to a data property, keeping it in sync with reactive state

Answer

You must use :value and @change separately for textareas

Answer

It binds to the innerHTML property of the textarea

Answer

Textareas require a special v-model.textarea modifier

Question 2

How do you bind a group of radio buttons to a single data value in Vue 3?

Accepted Answer

Use v-model on each radio input with the same data property; the value attribute determines what gets stored

Answer

Use v-model.radio on each input

Answer

Bind :checked and @change to each radio manually

Answer

Use a single <RadioGroup> component

Question 3

What does the `v-model.number` modifier do?

Accepted Answer

Automatically coerces the input's string value to a JavaScript number

Answer

Restricts the input to number characters only

Answer

Rounds the input value to the nearest integer

Answer

Formats the number with thousand separators

Question 4

How do you prevent form submission and handle it in Vue 3?

Accepted Answer

Answer

Answer

Answer

Question 5

How do you handle checkbox binding with an array in Vue 3?

Accepted Answer

Use v-model bound to an array; checked checkboxes push their value into the array

Answer

Use :checked and @change with array.indexOf

Answer

Use v-model.array on each checkbox

Answer

Checkboxes cannot be bound to arrays with v-model

Question 6

What library is commonly recommended for form validation in Vue 3?

Accepted Answer

VeeValidate or Vuelidate

Answer

Formik

Answer

React Hook Form

Answer

Angular Forms