HTMLView
HTMLView[string_String | List[strings__String] | _Offload, opts___]
a representation of an HTML element in the notebook. It is used for rendering HTML in-place, where this expression is located and also is used for dynamic indication.
HTMLView["<span style=\"color:red\">Hello World</span>"]
This is a core function behind most input elements, such as InputButton, InputText, TextView and etc.
Options
Prolog
works only if a string or a list of strings provided as input
A function to be executed on the frontend before embedding HTML into DOM. You probably have to define it by yourself (see WLJS Functions). It exposes in env following fields
env.htmlString //mutable HTML expression as string
There is a built-in feature for modifying the string - see below Post-template engine
Epilog
works only if a string or a list of strings provided as input A function to be executed on the frontend after embedding HTML into DOM. The exposed fields are
env.element //access to DOM element created
"Style"
a string, which sets CSS style attribute
"Class"
a string, which sets CSS class attribute
Post-template engine
There is built-in tool for post-processing HTML elements before embedding them into DOM. It can be included to the pipeline using Prolog option
HTMLView`TemplateProcessor[object_Association]
It has HoldFirst attribute and object will be evaluated on the frontend
This text processor replaces all string like
#name
With a corresponding field value from object["name"].
It comes handy to create unique ID's in runtime, before a widget is rendered on a page. For example
HTMLView["<div>Unique Id #instanceId</div>", Prolog->HTMLView`TemplateProcessor[<|"instanceId" -> CreateUUID[]|>]]
It will generate a new UID for each instance even if you copy and paste one.
Dynamic updates
It fully supports dynamic updates. Use Offload. For example
word = "";
HTMLView[word]
and then
word = "<h1>"<>RandomWord[]<>"</h1>";