This is a playground to test JavaScript. It runs a completely standard copy of Node.js on a virtual server created just for you. Every one of npm’s 300,000+ packages are pre-installed, so try it out:
const { Subject } = require('rxjs');
const { map, tap } = require('rxjs/operators');
const sub = new Subject();
const emits = [];
const mapped = [];
const emit$ = sub.asObservable().subscribe(x => emits.push(x));
const data$ = sub.asObservable().pipe(
map(x => {
return x;
}),
tap(x => mapped.push(x)),
tap(x => {
console.log('start', x)
console.log(new Error().stack)
if (x % 2 === 0) {
sub.next(2333);
}
if (x === 2333) {
sub.next(1111);
}
console.log('end', x)
})
);
const datas = [];
data$.subscribe(x => {
datas.push(x);
});
sub.next(1);
sub.next(2);
setTimeout(() => {
console.log('emits: ',emits);
console.log('mapped: ', mapped);
console.log('datas: ', datas);
}, 10);
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