caption: checkbox
colors: red orange yellow blue
created: 20131024141900000
fruits: bananas oranges grapes
list: [[CheckboxWidget (tag Mode)]] [[CheckboxWidget (field Mode)]] [[CheckboxWidget (listField Mode)]] [[CheckboxWidget (index Mode)]] [[CheckboxWidget (listIndex Mode)]] [[CheckboxWidget (filter Mode)]] [[CheckboxWidget (indeterminate)]]
modified: 20231113093304323
tags: Widgets TriggeringWidgets
title: CheckboxWidget
type: text/vnd.tiddlywiki
vegetables: carrots potatoes

! Introduction

The checkbox widget displays an HTML `<input type="checkbox">` element that is dynamically bound to either:

* the presence or absence of a specified tag on a specified tiddler
* the value of a specified field of a specified tiddler

! Content and Attributes

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.

|!Attribute |!Description |
|<<.attr tiddler>> |Title of the tiddler to manipulate (defaults to the [[Current Tiddler]]) |
|<<.widget-attr-link tag "CheckboxWidget (tag Mode)">> |The name of the [[tag|Tagging]] to which the checkbox is bound |
|<<.attr invertTag>> |When set to <<.value yes>>, flips the tag binding logic so that the absence of the tag causes the checkbox to be checked  |
|<<.widget-attr-link field "CheckboxWidget (field Mode)">> |The name of the field to which the checkbox is bound |
|<<.widget-attr-link listField "CheckboxWidget (listField Mode)">> |<<.from-version "5.2.3">> The name of the field that contains the list to which the checkbox is bound |
|<<.widget-attr-link index "CheckboxWidget (index Mode)">> |<<.from-version "5.1.14">> The property of the [[DataTiddler|DataTiddlers]] to which the checkbox is bound|
|<<.widget-attr-link listIndex "CheckboxWidget (listIndex Mode)">> |<<.from-version "5.2.3">> Like <<.attr index>>, but treats the value as a list the same way that <<.attr listField>> does |
|<<.widget-attr-link filter "CheckboxWidget (filter Mode)">> |<<.from-version "5.2.3">> A filter whose output determines the checked state of the checkbox |
|<<.attr checked>> |The value of the field corresponding to the checkbox being checked |
|<<.attr unchecked>> |The value of the field corresponding to the checkbox being unchecked |
|<<.attr default>> |The default value to use if the field is not defined |
|<<.widget-attr-link indeterminate "CheckboxWidget (indeterminate)">> |Whether ambiguous values can produce indeterminate checkboxes (see below) |
|<<.attr class>> |The class that will be assigned to the `<label>` element <$macrocall $name=".tip" _="""<<.from-version "5.2.3">> `tc-checkbox` is always applied by default, as well as `tc-checkbox-checked` when checked"""/> |
|<<.attr actions>> |<<.from-version "5.1.14">> A string containing ActionWidgets to be triggered when the status of the checkbox changes (whether it is checked or unchecked) |
|<<.attr uncheckactions>> |<<.from-version "5.1.16">> A string containing ActionWidgets to be triggered when the checkbox is unchecked |
|<<.attr checkactions>> |<<.from-version "5.1.20">> A string containing ActionWidgets to be triggered when the checkbox is checked |
|<<.attr disabled>> |<<.from-version "5.1.23">> Optionally disables the checkbox if set to <<.value yes>> (defaults to <<.value no>>)|
|<<.attr data-*>> |<<.from-version "5.3.2">> Optional [[data attributes|https://developer.mozilla.org/en-US/docs/Learn/HTML/Howto/Use_data_attributes]] to be assigned to the HTML `<input>` element |
|<<.attr style.*>> |<<.from-version "5.3.2">> Optional [[CSS properties|https://developer.mozilla.org/en-US/docs/Web/CSS/Reference]] to be assigned to the HTML `<input>` element |

<<.doc-tabs>>