jokernix

import { of } from 'rxjs';
import { concatMap, delay, mergeMap, switchMap } from 'rxjs/operators';

const source = of(2000, 1000);

source
  .pipe(concatMap(val => of(`Delayed by: ${val}ms`).pipe(delay(val))))
  .subscribe(val => console.log(`With concatMap: ${val}`));

source

jokernix

export function isEmpty(obj) {
  if (typeof obj === 'string' || obj === '') {
    return false;
  }
  if (typeof obj === 'number' || obj === 0) {
    return false;
  }
  if (typeof obj === 'boolean') {
    return false;
  }

jokernix

.sk-cube-grid .sk-cube {
    width: 33%;
    height: 33%;
    background-color: #FFFFFF;
    float: left;
    -webkit-animation: sk-cubeGridScaleDelay 1.3s infinite ease-in-out;
    animation: sk-cubeGridScaleDelay 3s infinite cubic-bezier(1, 1, 1, 0.2);
}