dccTextarea: Textarea component

In dash: An Interface to the Dash Ecosystem for Authoring Reactive Web Applications

Textarea component

Description

A basic HTML textarea for entering multiline text.

Usage

dccTextarea(id=NULL, value=NULL, autoFocus=NULL, cols=NULL,
disabled=NULL, form=NULL, maxLength=NULL, minLength=NULL,
name=NULL, placeholder=NULL, readOnly=NULL, required=NULL,
rows=NULL, wrap=NULL, accessKey=NULL, className=NULL,
contentEditable=NULL, contextMenu=NULL, dir=NULL,
draggable=NULL, hidden=NULL, lang=NULL, spellCheck=NULL,
style=NULL, tabIndex=NULL, title=NULL, n_blur=NULL,
n_blur_timestamp=NULL, n_clicks=NULL,
n_clicks_timestamp=NULL, loading_state=NULL,
persistence=NULL, persisted_props=NULL,
persistence_type=NULL)

Arguments

id	Character. The ID of this component, used to identify dash components in callbacks. The ID needs to be unique across all of the components in an app.
value	Character. The value of the textarea
autoFocus	Character. The element should be automatically focused after the page loaded.
cols	Character | numeric. Defines the number of columns in a textarea.
disabled	Character | logical. Indicates whether the user can interact with the element.
form	Character. Indicates the form that is the owner of the element.
maxLength	Character | numeric. Defines the maximum number of characters allowed in the element.
minLength	Character | numeric. Defines the minimum number of characters allowed in the element.
name	Character. Name of the element. For example used by the server to identify the fields in form submits.
placeholder	Character. Provides a hint to the user of what can be entered in the field.
readOnly	Logical | a value equal to: 'readonly', 'readonly', 'readonly'. Indicates whether the element can be edited. readOnly is an HTML boolean attribute - it is enabled by a boolean or 'readOnly'. Alternative capitalizations 'readonly' & 'READONLY' are also acccepted.
required	A value equal to: 'required', 'required' | logical. Indicates whether this element is required to fill out or not. required is an HTML boolean attribute - it is enabled by a boolean or 'required'. Alternative capitalizations 'REQUIRED' are also acccepted.
rows	Character | numeric. Defines the number of rows in a text area.
wrap	Character. Indicates whether the text should be wrapped.
accessKey	Character. Defines a keyboard shortcut to activate or add focus to the element.
className	Character. Often used with CSS to style elements with common properties.
contentEditable	Character | logical. Indicates whether the element's content is editable.
contextMenu	Character. Defines the ID of a <menu> element which will serve as the element's context menu.
dir	Character. Defines the text direction. Allowed values are ltr (Left-To-Right) or rtl (Right-To-Left)
draggable	A value equal to: 'true', 'false' | logical. Defines whether the element can be dragged.
hidden	Character. Prevents rendering of given element, while keeping child elements, e.g. script elements, active.
lang	Character. Defines the language used in the element.
spellCheck	A value equal to: 'true', 'false' | logical. Indicates whether spell checking is allowed for the element.
style	Named list. Defines CSS styles which will override styles previously set.
tabIndex	Character | numeric. Overrides the browser's default tab order and follows the one specified instead.
title	Character. Text to be displayed in a tooltip when hovering over the element.
n_blur	Numeric. Number of times the textarea lost focus.
n_blur_timestamp	Numeric. Last time the textarea lost focus.
n_clicks	Numeric. Number of times the textarea has been clicked.
n_clicks_timestamp	Numeric. Last time the textarea was clicked.
loading_state	Lists containing elements 'is_loading', 'prop_name', 'component_name'. those elements have the following types: - is_loading (logical; optional): determines if the component is loading or not - prop_name (character; optional): holds which property is loading - component_name (character; optional): holds the name of the component that is loading. Object that holds the loading state object coming from dash-renderer
persistence	Logical | character | numeric. Used to allow user interactions in this component to be persisted when the component - or the page - is refreshed. If 'persisted' is truthy and hasn't changed from its previous value, a 'value' that the user has changed while using the app will keep that change, as long as the new 'value' also matches what was given originally. Used in conjunction with 'persistence_type'.
persisted_props	List of a value equal to: 'value's. Properties whose user interactions will persist after refreshing the component or the page. Since only 'value' is allowed this prop can normally be ignored.
persistence_type	A value equal to: 'local', 'session', 'memory'. Where persisted user changes will be stored: memory: only kept in memory, reset on page refresh. local: window.localStorage, data is kept after the browser quit. session: window.sessionStorage, data is cleared once the browser quit.

Value

named list of JSON elements corresponding to React.js properties and their values

Examples

if (interactive()) {
    library(dash)

    app <- Dash$new()

    app$layout(
      htmlDiv(
        dccTextarea(
          placeholder = 'Enter a value...',
          value = 'This is a TextArea component'
        )
      )
    )

  app$run_server()
}

dash documentation built on June 23, 2022, 9:11 a.m.