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RxJS - Simple autocomplete box
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src="https://code.jquery.com/jquery-2.1.4.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/4.0.6/rx.all.js"></script> | |
| <meta charset="utf-8"> | |
| <title>Test</title> | |
| </head> | |
| <body> | |
| <input id="textbox"> | |
| <div id="results"></div> | |
| </body> | |
| </html> |
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| var Observable = Rx.Observable; | |
| var textbox = $('#textbox'); | |
| var results = $('#results'); | |
| var keyPresses = Observable.fromEvent(textbox, 'keyup'); | |
| var searchResultSet = keyPresses. | |
| throttle(20). | |
| map(key => textbox.val()). | |
| distinctUntilChanged(). | |
| map(search => getWikipediaSearchResults(search).retry(3)). | |
| switchLatest(); | |
| searchResultSet.forEach( | |
| r => { | |
| results.empty(); | |
| results.append(r.join('<br>')); | |
| }, | |
| err => { | |
| results.empty(); | |
| results.append(err); | |
| }); | |
| // Convert getJSON request to Wikipedia into an Observable | |
| function getWikipediaSearchResults(term) { | |
| return Observable.create(function forEach(observer) { | |
| var canceled = false; | |
| var url = 'https://en.wikipedia.org/w/api.php?action=opensearch&format=json&search=' + | |
| encodeURIComponent(term) + '&callback=?'; | |
| if (!canceled) { | |
| $.getJSON(url).done(data => { | |
| observer.onNext(data[1]); | |
| observer.onCompleted(); | |
| }); | |
| } | |
| return function dispose() { | |
| canceled = true; | |
| } | |
| }); | |
| } | |
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