25.6. Checkbox Input

A checkbox input represents a box to check. Checkbox inputs can be used by themselves or in groups. Checkbox inputs are best used with <label> tags.

Type Syntax Description Demo
checkbox <input type="checkbox" name="signUp"/> A small box for marking form option as checked.

25.6.1. Examples

Example

One checkbox. No value attribute is set, so the default value of on is submitted.

<label>crew<input type="checkbox" name="crewReady"/></label>

Submitted (if checked)

crewReady=on

Run it

Example

Multiple checkbox inputs. All with different name attributes.

<div>Activities</div>
<label>cooking<input type="checkbox" name="cooking"/></label>
<label>running<input type="checkbox" name="running"/></label>
<label>movies<input type="checkbox" name="movies"/></label>

Submitted (if cooking and movies are checked)

cooking=on&movies=on

Run it

Example

Multiple checkbox inputs with the SAME name attribute.

<div>Ingredients</div>
<label>Onion<input type="checkbox" name="ingredient" value="onion"/></label>
<label>Butter<input type="checkbox" name="ingredient" value="butter"/></label>
<label>Rice<input type="checkbox" name="ingredient" value="rice"/></label>

Submitted (if butter and rice are checked)

ingredient=butter&ingredient=rice

Run it

25.6.2. Check Your Understanding

Question

What is the default value submitted for a <checkbox> when checked?