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RangeInput creates a numeric range slider UI component with input fields. It works in the same way as RangeSlider.

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

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<template>
	<range-input
		dataField="ratings_count"
		componentId="BookSensor"
		title="RangeInput: Ratings"
		:range="{
			start: 3000,
			end: 50000
      }"
	/>
</template>

RangeInput provides all the props supported by RangeSlider.

Usage With All Props

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<template>
	<range-input
		componentId="RatingsSensor"
		dataField="ratings_count"
		:range="{
			start: 3000,
			end: 50000,
		}"
		:rangeLabels="{
			start: '3K',
			end: '50K',
		}"
		:defaultValue="{
			start: 10000,
			end: 30000
		}"
		title="Ratings Filter"
		:stepValue="1"
		:includeNullValues="true"
		className="component-wrapper"
		:validateRange="validateInputChange"
		:value="this.$data.currentValue"
		@change="handleChange"
		@value-change="handleValueChange"
	/>
</template>

Props

componentId String unique identifier of the component, can be referenced in other components' react prop.
dataField String DB data field to be mapped with the component's UI view. The selected range creates a database query on this field.
range Object an object with start and end keys and corresponding numeric values denoting the minimum and maximum possible slider 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 Object [optional] selects a initial range values using start and end key values from one of the data elements.
value Object [optional] controls the current value of the component.It selects the data from the range (on mount and on update). Use this prop in conjunction with change event.
validateRange function [optional] is a callback function that can be used to validate the range input values before applying it. This function accepts an array of numbers where first element represents the start range and second element represents the end range. The following example prevents the users to type negative value for start range input.

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<template>
	<range-input
		:validateRange="([start, end]) => {
            if(start <= end) {
                return true;
            }
            return false;
        }"
	/>
</template>

rangeLabels Object [optional] an object with start and end keys and corresponding String labels to show labels near the ends of the RangeInput component.
showFilter Boolean [optional] show the selected item as a filter in the selected filters view. Defaults to true.
snap Boolean [optional] makes the slider snap on to points depending on the stepValue when the slider is released. Defaults to true. When set to false, stepValue is ignored.
stepValue Number [optional] step value specifies the slider stepper. Value should be an integer greater than or equal to 1 and less than Math.floor((range.end - range.start) / 2). Defaults to 1.
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.
includeNullValues Boolean [optional] If you have sparse data or document or items not having the value in the specified field or mapping, then this prop enables you to show that data. Defaults to false.

Demo

Styles

RangeInput component supports innerClass prop with the following keys:

slider-container
input-container

The other innerClass properties are the same as supported by RangeSlider.

Extending

RangeInput component can be extended to

customize the look and feel with className,
update the underlying DB query with customQuery,
connect with external interfaces using beforeValueChange, valueChange and queryChange,
filter data using a combined query context via the react prop,
as a controlled component using value prop and change event.

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<template>
	<range-input
		className="custom-class"
		:customQuery="getCustomQuery"
		:react="react"
		:beforeValueChange="handleBeforeValueChange"
		@valueChange="handleValueChange"
		@queryChange="handleQueryChange"
	/>
</template>
<script>
	export default {
		name: 'app',
		methods: {
			getCustomQuery: (value, props) => {
				return {
					query: {
						match: {
							price: 1000,
						},
					},
				};
			},
			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 String CSS class to be injected on the component container.
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 RangeInput 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. For example,

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```
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

queryChange 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.
valueChange 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” RangeInput.
change is an event 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.

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<template>
    <range-input
        // ...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>