RxJS Demos

.startWith

by dream apple

HTML

<div class="app">
    <button id="test">test</button>
</div>

<script src="https://cdn.bootcss.com/rxjs/5.0.0-rc.1/Rx.min.js"></script>

JavaScript

let testEle = document.querySelector('#test');
    let test = Rx.Observable.fromEvent(testEle, 'click');
    test.startWith('startup click')
            .subscribe((e) => {
                    console.log(e);
            });