Configuring Block Editor Label Properties

When configuring a block, the label property allows you to define a label for the appearance of the Block in the editor. The label can use AngularJS template string syntax to display values of properties. Example: My Block {{myPropertyAlias}} will be shown as: My Block FooBar.

You can also use more advanced expressions using AngularJS filters. Example: {{myPropertyAlias | limitTo:100}} or for a property using the Richtext editor {{myPropertyAlias | ncRichText | truncate:true:100}}.

It is also possible to use properties from the settings model by using {{$settings.propertyAlias}}.

In some cases, you might want to create a fallback label. This can be achieved using the following format: {{myProperty || $contentTypeName}}.

This example will show the name of the ElementType when the value of myProperty is not defined.

Useful Angular filters

As well as the default AngularJS filters, Umbraco ships with additional filters which are useful for setting the Label field of Block editors.

Filter	Description	Property type	Parameters
ncNodeName	Gets the name of a node	Umbraco node
ncRichText	Strips HTML	Richtext editor
mediaItemResolver	Retrieves a Media Item object	Media Picker
limitTo	AngularJS native truncate	String	n: maximum length of the string
truncate	Umbraco's richer truncate function	String	wordwise: boolean to indicate whether to truncate a string mid-word or not max: maximum length of the string tail (optional): string to indicate a truncated string, "…" by default
umbWordLimit	Truncates to a number of words (rather than characters)	String	n: maximum number of words in string
umbCmsTitleCase	Converts a string to title case	String
umbCmsJoinArray	Joins an array into one string	Array (of string or object)	separator: string used to join values together, e.g. ", " prop (optional): string key indicating which property to join when used on an array of objects

Example: mediaItemResolver

This is how you could use the filter for a Media Picker of the type Umbraco.MediaPicker3 with multiple images:

{{(myPropertyAlias[0].mediaKey | mediaItemResolver).name}}

The mediaKey is a Guid like c7a4526c-6b32-4665-a047-5b3e7256d973.

For the Media Name, the same could be achieved using ncNodeName like shown below:

{{myPropertyAlias[0].mediaKey ? ('umb://media/'+myPropertyAlias[0].mediaKey.split("-").join("") | ncNodeName) : 'No Image' }}

The ncNodeName value expects a UDI like umb://media/c7a4526c6b324665a0475b3e7256d973.

Custom filters

If the filters do not suit your needs, you can create custom filters by creating a plugin in App_Plugins and adding a filter module. You can see an example below:

If you do not have an /App_Plugins folder, you can create it at the root of your project.

1. Create a plugin by adding a folder inside App_Plugins called MyFilters

2. Inside the MyFilters folder add a package.manifest file containing:

{
    "name": "MyFilters",
    "version": "1.0.0",
    "allowPackageTelemetry": false,
    "javascript": [
        "/App_Plugins/MyFilters/myFilter.filter.js"
    ]
}

1. Add a myFilter.filter.js file containing:

angular.module("umbraco.filters").filter("myFilter", function () {
  return function (input, parameter1, parameter2, etc) {
      // Apply any custom logic to modify the output value and return a string
      return `My filter says: "${input}"`;
  }
});

1. Implement a block editor of your choice. When adding a label add {{ myFilter }} which is the property alias of the element type. The myFilter property has a textstring editor. When adding the content, the block editor will then display the data that you input.

Special variables

Variable	Description
$index	The 1-based index of this block item in the current block list
$contentTypeName	The name of the Element Type used for the Block
$settings	Provides access to the settings model for the block (if configured)
$layout	Provides access to the layout model for the block (columnSpan and rowSpan)