The content of the `<$checkbox>` widget is displayed within an HTML `<label>` element immediately after the checkbox itself. This means that clicking on the content will toggle the checkbox.
Using the checkbox widget in tag mode requires the ''tag'' attribute to specify the name of the tag. The ''tiddler'' attribute specifies the tiddler to target, defaulting to the current tiddler if not present.
This example creates a checkbox that flips the ''done'' tag on the current tiddler:
```
<$checkbox tag="done">Is it done?</$checkbox>
```
!! Field Mode
Using the checkbox widget in field mode requires the ''field'' attribute to specify the name of the field. The ''checked'' and ''unchecked'' attributes specify the values to be assigned to the field to correspond to its checked and unchecked states respectively. The ''default'' attribute is used as a fallback value if the field is not defined.
This example creates a checkbox that is checked if the field ''status'' is equal to ''open'' and unchecked if the field is equal to ''closed''. If the field is undefined then it defaults to ''closed'', meaning that the checkbox will be unchecked if the ''status'' field is missing.
```
<$checkbox field="status" checked="open" unchecked="closed" default="closed">Is it open?</$checkbox>
