MultiDropdownRange

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MultiDropdownRange creates a dropdown based multiple numeric range UI component that is connected to a database field.

Note

It is exactly like the MultiRange component but displayed in a dropdown, ideal for showing additional UI filters while conserving screen space

Example uses:

  • filtering search results by prices in an e-commerce or food delivery experience.
  • browsing movies by a ratings filter.

Usage

Basic Usage

<MultiDropdownRange
  componentId="PriceSensor"
  dataField="price"
  data={
    [{"start": 0, "end": 10, "label": "Cheap"},
     {"start": 11, "end": 20, "label": "Moderate"},
     {"start": 21, "end": 50, "label": "Pricey"},
     {"start": 51, "end": 1000, "label": "First Date"}]
  }
  title="Prices"
/>

Usage With All Props

<MultiDropdownRange
  componentId="PriceSensor"
  dataField="price"
  data={
    [{"start": 0, "end": 10, "label": "Cheap"},
     {"start": 11, "end": 20, "label": "Moderate"},
     {"start": 21, "end": 50, "label": "Pricey"},
     {"start": 51, "end": 1000, "label": "First Date"}]
  }
  title="Prices"
  defaultValue={["Cheap", "Moderate"]}
  placeholder="Select price ranges"
  showFilter={true}
  filterLabel="Price"
  URLParams={false}
/>

Props

  • componentId String unique identifier of the component, can be referenced in other components’ react prop.
  • dataField String data field to be connected to the component’s UI view. The range items are filtered by a database query on this field.
  • data Object Array collection of UI labels with associated start and end range values.
  • 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.
  • defaultValue Array [optional] selects initial items from the data range on mount.
  • value Array [optional] controls the current value of the component.It selects the item from the data (on mount and on update).Use this prop in conjunction with onChange function.
  • 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.
  • placeholder String [optional] set the placeholder to show for the dropdown UI, useful when no option is defaultSelected. The default placeholder value is set to “Select a value”.
  • 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 list. This is useful for sharing URLs with the component state. Defaults to false.

Demo


Styles

MultiDropdownRange component supports innerClass prop with the following keys:

  • title
  • select
  • list
  • icon

Read more about it here.

Extending

MultiDropdownRange 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.
<MultiDropdownRange
  ...
  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);
    }
  }
/>
  • className String CSS class to be injected on the component container.
  • style Object CSS styles to be applied to the MultiDropdownRange 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 MultiDropdownRange 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(s) when range item(s) is/are selected in a “Prices” MultiDropdownRange.
  • 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.

Examples

MultiDropdownRange with default props