<label class="radio-check">
    <input type="checkbox" id="check-1" name="check-1">
    <span>Checkbox</span>
</label>
<label class="radio-check">
  <input type="checkbox" id="{{id}}" name="{{id}}">
  <span>{{label}}</span>
</label>
{
  "id": "check-1",
  "group": "check-group-1",
  "label": "Checkbox"
}

Input type: checkbox

An <input> element with the type of checkbox. Related MDN article.

For the sake of simplicity, usage in this pattern library is always with the <label> wrapping the <input>, like so:

<label class="radio-check">
  <input type="checkbox" id="check-1" name="check-1">
  <span>Checkbox</span>
</label>