DynamicRangeSlider

DynamicRangeSlider creates a numeric range slider UI component. It is used for granular filtering of numeric data.

Example uses:

• filtering products from a price range in an e-commerce shopping experience.
• filtering flights from a range of departure and arrival times.

Usage

Basic Usage

<template>
	<dynamic-range-slider
		dataField="books_count"
		componentId="BookSensor"
		title="DynamicRangeSlider: Ratings"
	/>
</template>

While DynamicRangeSlider only requires the above props to be used, it comes with many additional props for pre-setting default range values, setting the step value of the range slider, specifying labels for the range endpoints, etc.

Usage With All Props

<template>
	<dynamic-range-slider
		dataField="books_count"
		componentId="BookSensor"
		compoundClause="filter"
		title="DynamicRangeSlider: Ratings"
		:defaultValue="function(min, max){
		  return {
		      start: min + 1000,
		      end: max - 1000,
		  }
		}"
		:rangeLabels="function(min, max){
		  return {
		      start: min + ' Books',
		      end: max + ' Books',
		  }
		}"
		:showFilter="true"
		:URLParams="false"
		:endpoint="{
			url:'https://appbase-demo-ansible-abxiydt-arc.searchbase.io/recipes-demo/_reactivesearch.v3',
			headers: {
				// put relevant headers
			},
			method: 'POST'
		}"		
	/>
</template>

Props

componentId

unique identifier of the component, can be referenced in other components' react prop.

compoundClause

Configure whether the DSL query is generated with the compound clause of must or filter. If nothing is passed the default is to use must. Setting the compound clause to filter allows search engine to cache and allows for higher throughput in cases where scoring isn’t relevant (e.g. term, geo or range type of queries that act as filters on the data)

This property only has an effect when the search engine is either elasticsearch or opensearch.

Note: compoundClause is supported with v8.16.0 (server) as well as with serverless search.

endpoint

endpoint prop provides the ability to query a user-defined backend service for this component, overriding the data endpoint configured in the ReactiveBase component. Accepts the following properties:

• url String [Required] URL where the data cluster is hosted.
• headers Object [optional]
  set custom headers to be sent with each server request as key/value pairs.
• method String [optional]
  set method of the API request.
• body Object [optional]
  request body of the API request. When body isn't set and method is POST, the request body is set based on the component's configured props.

• Overrides the endpoint property defined in ReactiveBase.
• If required, use transformResponse prop to transform response in component-consumable format.

dataField

DB data field to be mapped with the component's UI view. The selected range creates a database query on this field.

nestedField

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

title of the component to be shown in the UI.

defaultValue

a function that accepts min and max range values as parameters and returns an object representing current selection from the range with start and end keys.

value

sets the current value of the component. It sets the value(an object with start and end keys), on mount and on update. Use this prop in conjunction with the change event.

rangeLabels

a function that accepts min and max range values as parameters and returns an object representing labels with start and end keys.

showFilter

show the selected item as a filter in the selected filters view. Defaults to true.

URLParams

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.

index

The index prop can be used to explicitly specify an index to query against for this component. It is suitable for use-cases where you want to fetch results from more than one index in a single ReactiveSearch API request. The default value for the index is set to the app prop defined in the ReactiveBase component.

Demo

Styles

DynamicRangeSlider component supports innerClass prop with the following keys:

• title

Read more about it here.

Extending

DynamicRangeSlider 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, value-change and query-change.

<template>
	<dynamic-range-slider
		className="custom-class"
		:customQuery="getCustomQuery"
		:react="react"
		:beforeValueChange="handleBeforeValueChange"
		@value-change="handleValueChange"
		@query-change="handleQueryChange"
	/>
</template>
<script>
	export default {
		name: 'app',
		methods: {
			getCustomQuery: (value, props) => {
				return {
					query: {
						match: {
							data_field: 'this is a test',
						},
					},
				};
			},
			handleBeforeValueChange: value => {
				// called before the value is set
				// returns a promise
				return new Promise((resolve, reject) => {
					// update state or component props
					resolve();
					// or reject()
				});
			},
			handleValueChange: value => {
				console.log('current value: ', value);
				// set the state
				// use the value with other js code
			},
			handleQueryChange: (prevQuery, nextQuery) => {
				// use the query with other js code
				console.log('prevQuery', prevQuery);
				console.log('nextQuery', nextQuery);
			},
		},
		computed: {
			react() {
				return {
					and: ['pricingFilter', 'dateFilter'],
					or: ['searchFilter'],
				};
			},
		},
	};
</script>

className

CSS class to be injected on the component container.

customQuery

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 DynamicRangeSlider component as long as the component is a part of react dependency of at least one other component.

beforeValueChange

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.

Note:

If you're using Reactivesearch version >= 1.1.0, beforeValueChange can also be defined as a synchronous function. value is updated by default, unless you throw an Error to reject the update. For example:

beforeValueChange = value => {
	// The update is accepted by default
	if (value.start > 3000) {
		// To reject the update, throw an error
		throw Error('Start value must be less than or equal to 3000.');
	}
};

Events

change

is an event that 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 event is useful to control the value updates of search input.

<template>
	<dynamic-range-slider
		// ...other props
		value="value"
		@change="handleChange"
	/>
</template>

<script>
export default {
name: 'app',
	data() {
		return {
			value: {
				start: 3000,
				end: 50000
			}
		}
	},
	methods: {
		handleChange(value) {
			this.value = value;
		}
	}
};
</script>

query-change

is an event which accepts component's prevQuery and nextQuery as parameters. It is called everytime the component's query changes. This event is handy in cases where you want to generate a side-effect whenever the component's query would change.

value-change

is an event which accepts component's current value as a parameter. It is called everytime the component's value changes. This event 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 some range is selected in a “Discounted Price” DynamicRangeSlider.