caption: action-deletefield
created: 20141025120850184
modified: 20141025120850184
tags: Widgets ActionWidgets
title: ActionDeleteFieldWidget
type: text/vnd.tiddlywiki

! Introduction

The ''action-deletefield'' widget is an [[action widget|ActionWidgets]] that deletes specified fields of a tiddler. ActionWidgets are used within triggering widgets such as the ButtonWidget.

! Content and Attributes

The ''action-deletefield'' widget is invisible. Any content within it is ignored.

|!Attribute |!Description |
|$tiddler |The title of the tiddler whose fields are to be modified (if not provided defaults to the [[WidgetVariable: currentTiddler]] |
|$field |Optional name of a field to delete |
|//{any attributes not starting with $}// |Each attribute name specifies a field to be deleted. The attribute value is ignored and need not be specified |

! Examples

Here is an example of a button that deletes the caption and tags fields of the current tiddler:

<$macrocall $name='wikitext-example-without-html'
src='<$button>
<$action-deletefield caption tags/>
Delete "caption" and "tags"
</$button>'/>

Here is an example of a button that deletes the modified date and tags fields of the tiddler HelloThere:

<$macrocall $name='wikitext-example-without-html'
src='<$button>
<$action-deletefield $tiddler="HelloThere" modified tags/>
Delete "modified" and "tags" from ~HelloThere
</$button>'/>

Here is an example of a button that uses the optional $field attribute to delete the text field of the tiddler HelloThere:

<$macrocall $name='wikitext-example-without-html'
src='<$button>
<$action-deletefield $tiddler="HelloThere" $field="text"/>
Delete text from ~HelloThere
</$button>'/>
