ReactiveList
ReactiveList
creates a data-driven result list UI component. This list can reactively update itself based on changes in other components or changes in the database itself.
Example uses:
- showing a feed of results based on the applied search criteria.
- streaming realtime feed updates based on applied criteria like in a newsfeed.
Usage
Basic Usage
<ReactiveList
componentId="SearchResult"
react={{
"and": ["CitySensor", "SearchSensor"]
}}
renderItem={(res) => <div>{res.title}</div>}
/>
Usage With All Props
<ReactiveList
componentId="SearchResult"
dataField="ratings"
stream={true}
pagination={false}
paginationAt="bottom"
pages={5}
sortBy="desc"
size={10}
loader="Loading Results.."
showResultStats={true}
renderItem={(res) => <div>{res.title}</div>}
renderResultStats={
function(stats){
return (
`Showing ${stats.displayedResults} of total ${stats.numberOfResults} in ${stats.time} ms`
)
}
}
react={{
and: ["CitySensor", "SearchSensor"]
}}
/>
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. It is useful for providing a sorting context. -
excludeFields
String Array
[optional] fields to be excluded in search results. -
includeFields
String Array
[optional] fields to be included in search results. -
stream
Boolean
[optional] whether to stream new result updates in the UI. Defaults tofalse
.stream: true
is appended to the streaming hit objects, which can be used to selectively react to streaming changes (eg. showing fade in animation on new streaming hits, Twitter/Facebook like streams, showing the count of new feed items available like 2 New Tweets) -
scrollTarget
String
[optional] acceptsid
of the container you wish to apply infinite loading on. Note: The container should be scrollable. -
scrollOnChange
Boolean
[optional] Enables you to customise the window scrolling experience on query change. Defaults totrue
i.e. The window will scroll to top in case of the query change, which can be triggered by change in pagination, change in filters or search value, etc. When set tofalse
, scroll position will stay intact. -
pagination
Boolean
[optional] Defaults tofalse
, When set totrue
, a pagination based list view with page numbers will appear. -
infiniteScroll
Boolean
[optional] Defaults totrue
, When set totrue
, an infinite scroll based view will appear. -
paginationAt
String
[optional] Determines the position where to show the pagination, only applicable when pagination prop is set totrue
. Accepts one oftop
,bottom
orboth
as valid values. Defaults tobottom
. -
pages
Number
[optional] number of user selectable pages to be displayed when pagination is enabled. Defaults to 5. -
sortBy
String
[optional] sort the results by eitherasc
ordesc
order. It is an alternative tosortOptions
, both can’t be used together. -
sortOptions
Object Array
[optional] an alternative to thesortBy
prop,sortOptions
creates a sorting view in the ReactiveList component’s UI. Each array element is an object that takes three keys:label
- label to be displayed in the UI.dataField
- data field to use for applying the sorting criteria on.sortBy
- specified as eitherasc
ordesc
.
-
defaultSortOption
String
[optional] accepts the label of the desired sort option to set default sort value from givensortOptions
array. -
size
Number
[optional] number of results to show per view. Defaults to 10. -
loader
String or JSX
[optional] display to show the user while the data is loading, acceptsString
orJSX
markup. -
showLoader
Boolean
[optional] defaults totrue
, if set tofalse
then the ReactiveList will not display the default loader. -
showResultStats
Boolean
[optional] whether to show result stats in the form of results found and time taken. Defaults totrue
. -
react
Object
[optional] a dependency object defining how this component should react based on the state changes in the sensor components. -
URLParams
Boolean
[optional] when set adds the current page number to the url. Only works whenpagination
is enabled. -
defaultQuery
Function
[optional] applies a default query to the result component. This query will be run when no other components are being watched (via React prop), as well as in conjunction with the query generated from the React prop. The function should return a query. Read more about it here. -
renderItem
Function
[optional] returns a list element object to be rendered based on theres
data object. This callback function prop is called for each data item rendered in the ReactiveList component’s view. For example,renderItem={ function(res) { return ( <a className="full_row single-record single_record_for_clone" key={res._id} > <div className="text-container full_row" style={{ paddingLeft: "10px" }}> <div className="text-head text-overflow full_row"> <span className="text-head-info text-overflow"> {res.name ? res.name : ""} - {res.brand ? res.brand : ""} </span> <span className="text-head-city">{res.brand ? res.brand : ""}</span> </div> <div className="text-description text-overflow full_row"> <ul className="highlight_tags"> {res.price ? `Priced at $${res.price}` : "Free Test Drive"} </ul> </div> </div> </a> ); } }
-
render
Function
[optional] A function returning the UI you want to render based on your results. This function receives a list of parameters and expects to return aJSX
. Read more about it here.Note:
Either
renderItem
orrender
is required in ReactiveList for rendering the data. -
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> ) }
-
renderResultStats
Function
[optional] renders custom result stats using a callback function that takesstats
object as parameter and expects it to return a string or JSX.stats
object contains following propertiesnumberOfResults
:number
Total number of results foundnumberOfPages
:number
Total number of pages found based on current page sizecurrentPage
:number
Current page number for which data is being renderedtime
:number
Time taken to find total results (in ms)-
displayedResults
:number
Number of results displayed in current viewrenderResultStats={ function(stats){ return ( `Showing ${stats.displayedResults} of total ${stats.numberOfResults} in ${stats.time} ms` ) } }
-
renderNoResults
Function
[optional] show custom message or component when no results found. -
renderPagination
Function
[optional] can be used to render custom pagination.pages
:number
Number of pages to be displayedtotalPages
:number
Total number of pages found based on current page sizecurrentPage
:number
Current page number for which data is being renderedsetPage
:function
Function use to set the currentPage-
fragmentName
:string
componentId
of the Result component for setting url params for eg:<a href={`?${fragmentName}=${pageNumber}`}>{pageNumber}</a>
renderPagination={({ pages, totalPages, currentPage, setPage, fragmentName }) => { const selectPage = Number.isFinite(pages) && ( <select value={currentPage + 1} onChange={e => setPage(parseInt(e.target.value, 10))} > {new Array(pages).fill(currentPage).map((item, i) => (item + i > totalPages ? null : ( <option key={`${i}-${fragmentName}`} value={i + item} > Page {i + item} </option> )), )} </select> ); return selectPage; }
-
onData
Function
[optional] gets triggered after data changes, which returns an object with these properties:data
,streamData
,promotedData
,rawData
&resultStats
. -
onError
Function
[optional] gets triggered in case of an error and provides theerror
object, which can be used for debugging or giving feedback to the user if needed. -
onPageChange
Function
[optional] executes when the current page is changed. If not defined,window
will be scrolled to the top of the page. -
onPageClick
Function
[optional] accepts a function which is invoked with the updated page value when a pagination button is clicked. For example if ‘Next’ is clicked with the current page number as ‘1’, you would receive the value ‘2’ as the function parameter.
Note:
The fundamental difference between
onPageChange
andonPageClick
is thatonPageClick
is only called on a manual interaction with the pagination buttons, whereas,onPageChange
would also be invoked if some other side effects caused the results to update which includes updating filters, queries or changing pages. The behaviour of these two may change in the future versions as we come up with a better API.
Sub Components
- ResultCardsWrapper
A wrapper component for
ResultCard
components to render a card based layout. Read more about the usage here. - ResultListWrapper
A wrapper component for
ResultList
components to render a list based layout. Read more about the usage here.
Demo
Styles
ReactiveList
component supports innerClass
prop with the following keys:
resultsInfo
sortOptions
resultStats
noResults
button
pagination
active
list
poweredBy
Read more about it here.
Extending
ReactiveList
component can be extended to
- customize the look and feel with
className
,style
, - render individual result data items using
renderItem
, - render the entire data using
render
. - connect with external interfaces using
onQueryChange
.
<ReactiveList
...
className="custom-class"
style={{"paddingBottom": "10px"}}
renderItem={
function(res) {
return(
<div>
{ res.data }
</div>
)
}
}
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 ReactiveList component. - renderItem
Function
[optional] a callback function where user can define how to render the view based on the data changes. -
render
Function
[optional] an alternative callback function torenderItem
, where user can define how to render the view based on all the data changes.
It accepts an object with these properties:loading
:boolean
indicates that the query is still in progresserror
:object
An object containing the error infodata
:array
An array of results obtained from the applied query.streamData
:array
An array of results streamed since the applied query, aka realtime data. Here, a meta property_updated
or_deleted
is also present within a result object to denote if an existing object has been updated or deleted.-
promotedData
:array
An array of promoted results obtained from the applied query. Read MoreNote:
data
,streamData
andpromotedData
results has a property called_click_id
which can be used with triggerAnalytics to register the click analytics info. rawData
:array
An array of original hits obtained from the applied query.-
resultStats
:object
An object with the following properties which can be helpful to render custom stats:numberOfResults
:number
Total number of results foundnumberOfPages
:number
Total number of pages found based on current page sizecurrentPage
:number
Current page number for which data is being renderedtime
:number
Time taken to find total results (in ms)displayedResults
:number
Number of results displayed in current view
handleLoadMore
:function
A callback function to be called to load the next page of results into the view. The callback function is only applicable in the case of infinite loading view (i.e.infiniteScroll
prop set totrue
).triggerAnalytics
:function
A function which can be called to register a click analytics. Read More
<ReactiveList
showLoader={false} // Hides the default loader
render={({
loading,
error,
data,
}) => {
if(loading) {
return <div>Fetching Results.</div>
}
if(error) {
return (
<div>
Something went wrong! Error details {JSON.stringify(error)}
</div>
)
}
return (
<ul>
{
data.map(item => (
<li>
{item.title}
{/* Render UI */}
</li>
))
}
</ul>
)
}}
/>
Or you can also use render function as children
<ReactiveList>
{
({
loading,
error,
data,
streamData,
promotedData,
rawData,
resultStats,
handleLoadMore,
triggerAnalytics
}) => (
// return UI to be rendered
)
}
</ReactiveList>
Note
The
streamResults
parameter will be[]
unlessstream
prop is set totrue
. Check the handling streaming guide for more info.
- 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.