TagCloud

Image to be displayed

TagCloud creates a tag cloud UI component, also known as word cloud or weighted list in visual design. It is a visual representation of text data, typically used to depict tags on websites, or to visualize free form text.

Example uses:

  • news websites and blogs displaying related tags to a current post.
  • show an e-commerce listings filter of user generated tags.

Usage

Basic Usage

<TagCloud
  componentId="TagCloud01"
  dataField="cities"
/>

Usage With All Props

<TagCloud
  componentId="CitiesSensor"
  dataField="cities"
  title="City Cloud"
  size={32}
  showCount={true}
  multiSelect={true}
  defaultValue={["Auckland", "Atlanta"]}
  queryFormat="or"
  react={{
    and: ["CategoryFilter", "SearchFilter"]
  }}
  showFilter={true}
  filterLabel="Cities"
  URLParams={false}
  loader="Loading ..."
/>

Props

  • componentId String unique identifier of the component, can be referenced in other components’ react prop.
  • dataField String data field(s) to be mapped with the component’s UI view.
  • nestedField String [optional] use to set the nested mapping field that allows arrays of objects to be indexed in a way that they can be queried independently of each other. Applicable only when dataField is a part of nested type.
  • title String or JSX [optional] title of the component to be shown in the UI.
  • loader String or JSX [optional] to display an optional loader while fetching the options.
  • size Number [optional] number of items to be displayed in the list. Defaults to 100.
  • showCount Boolean [optional] show a count of the number of occurrences besides each list item. Defaults to true.
  • multiSelect Boolean [optional] whether to support multiple tag selections. Defaults to false.
  • defaultValue StringArray [optional] pre-select tag(s) from the tag cloud. An Array is accepted when multiSelect mode is enabled.
  • value String Array [optional] controls the current value of the component. It selects the tag from the available tags (on mount and on update). Use this prop in conjunction with onChange function.
  • queryFormat String [optional] sets whether to show results as a union with "or" (default) or an intersection with "and". For example, if two tags are selected, say “Guitars” and “Electric Guitars” then with a queryFormat of “or” you would get results for both the tags. With a queryFormat of “and” you would get more specific results for guitars which satisfy both the tags.
  • showFilter Boolean [optional] show as filter when a value is selected in a global selected filters view. Defaults to true.
  • filterLabel String [optional] An optional label to display for the component in the global selected filters view. This is only applicable if showFilter is enabled. Default value used here is componentId.
  • URLParams Boolean [optional] enable creating a URL query string parameter based on the selected value of the tag(s). This is useful for sharing URLs with the component state. Defaults to false.
  • renderError String or JSX or Function [optional] can be used to render an error message in case of any error.

    renderError={(error) =>
        <div>
            Something went wrong!<br/>Error details<br/>{error}
        </div>
    }
  • onChange function [optional] is a callback function which accepts component’s current value as a parameter. It is called when you are using the value prop and the component’s value changes. This prop is used to implement the controlled component behavior.
  • onError Function [optional] gets triggered in case of an error and provides the error object, which can be used for debugging or giving feedback to the user if needed.

Demo


Styles

TagCloud component supports innerClass prop with the following keys:

  • title
  • list
  • input

Read more about it here.

Extending

TagCloud component can be extended to

  1. customize the look and feel with className, style,
  2. update the underlying DB query with customQuery,
  3. connect with external interfaces using beforeValueChange, onValueChange and onQueryChange,
  4. filter data using a combined query context via the react prop.
<TagCloud
  ...
  className="custom-class"
  style={{"paddingBottom": "10px"}}
  customQuery={
    function(value, props) {
      return {
        query: {
          match: {
            data_field: "this is a test"
          }
        }
      }
    }
  }
  beforeValueChange={
    function(value) {
      // called before the value is set
      // returns a promise
      return new Promise((resolve, reject) => {
        // update state or component props
        resolve()
        // or reject()
      })
    }
  }
  onValueChange={
    function(value) {
      console.log("current value: ", value)
      // set the state
      // use the value with other js code
    }
  }
  onQueryChange={
    function(prevQuery, nextQuery) {
      // use the query with other js code
      console.log('prevQuery', prevQuery);
      console.log('nextQuery', nextQuery);
    }
  }
  react={{
    "and": ["PriceFilter"]
  }}
/>
  • className String CSS class to be injected on the component container.
  • style Object CSS styles to be applied to the TagCloud component.
  • customQuery Function takes value and props as parameters and returns the data query to be applied to the component, as defined in Elasticsearch Query DSL. Note: customQuery is called on value changes in the TagCloud component as long as the component is a part of react dependency of at least one other component.
  • beforeValueChange Function is a callback function which accepts component’s future value as a parameter and returns a promise. It is called everytime before a component’s value changes. The promise, if and when resolved, triggers the execution of the component’s query and if rejected, kills the query execution. This method can act as a gatekeeper for query execution, since it only executes the query after the provided promise has been resolved.
  • onValueChange Function is a callback function which accepts component’s current value as a parameter. It is called everytime the component’s value changes. This prop is handy in cases where you want to generate a side-effect on value selection. For example: You want to show a pop-up modal with the valid discount coupon code when a user picks a category in a TagCloud.
  • onQueryChange Function is a callback function which accepts component’s prevQuery and nextQuery as parameters. It is called everytime the component’s query changes. This prop is handy in cases where you want to generate a side-effect whenever the component’s query would change.
  • react Object specify dependent components to reactively update TagCloud’s data view.

    • key String one of and, or, not defines the combining clause.

      • and clause implies that the results will be filtered by matches from all of the associated component states.
      • or clause implies that the results will be filtered by matches from at least one of the associated component states.
      • not clause implies that the results will be filtered by an inverse match of the associated component states.
    • value String or Array or Object

      • String is used for specifying a single component by its componentId.
      • Array is used for specifying multiple components by their componentId.
      • Object is used for nesting other key clauses.

Examples

See more stories for TagCloud on playground.

TagCloud with default props