v-model with checkboxes in Vue - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does v-model do when used with a single checkbox in Vue?

v-model binds the checkbox's checked state to a data property. When the checkbox is checked, the property becomes true. When unchecked, it becomes false.

beginner

How does v-model work with multiple checkboxes bound to the same array?

Each checked checkbox adds its value to the array. Unchecking removes its value. This way, the array always holds the selected checkbox values.

beginner

What type of data should the bound variable be when using v-model with multiple checkboxes?

The bound variable should be an array to hold multiple selected values from the checkboxes.

intermediate

How do you set the value each checkbox adds to the array when using v-model with multiple checkboxes?

Use the value attribute on each checkbox input to specify what value it adds to the array when checked.

intermediate

What happens if you bind v-model to a non-array variable with multiple checkboxes?

Vue will not be able to track multiple selections properly. The bound variable should be an array to handle multiple checkbox values.

What type of data should v-model bind to when using multiple checkboxes?

A An array

B A boolean

C A string

D A number

Multiple checkboxes represent multiple selections, so v-model binds to an array holding all selected values.

What does v-model bind to for a single checkbox?

A An array

B A number

C An object

D A boolean

A single checkbox toggles between checked and unchecked, so v-model binds to a boolean value.

How do you specify the value a checkbox adds to the array when checked?

A Using the <code>checked</code> attribute

B Using the <code>value</code> attribute

C Using the <code>name</code> attribute

D Using the <code>id</code> attribute

The value attribute sets what value the checkbox adds to the array when checked.

What happens if you uncheck a checkbox bound with v-model to an array?

A Its value is removed from the array

B Its value stays in the array

C The array becomes empty

D The array becomes a boolean

Unchecking removes that checkbox's value from the array, keeping the array updated with only selected values.

Which Vue directive is used to bind checkbox state to data?

A <code>v-bind</code>

B <code>v-if</code>

C <code>v-model</code>

D <code>v-for</code>

v-model creates two-way binding between form inputs like checkboxes and Vue data.

Explain how v-model works with multiple checkboxes in Vue.

Think about how multiple selections are stored and updated.

Describe the difference in v-model usage between a single checkbox and multiple checkboxes.

Consider the data type that matches the selection type.