NgxDelayIf

If you need to delay emitting values based on their content you are right here. Use this library to implement conditional delaying emitting values.

Installation

npm install ngx-delay-if
# Or if you use yarn
yarn add ngx-delay-if

Usage

import delayIf follows:

import { delayIf } from 'ngx-delay-if';

and then use it as as the samples below.

Sample 1

// Delay emitting even values for 10 seconds
obs$.pipe(delayIf(
	value => value % 2 === 0, 
	value => value * 1000)).subscribe(
	value => {
		console.log(value);
	});

Output:
1  3  5  7  9  0  2  4  6  8  10  

Sample 2

const obs$ = interval(10);

// Delay emitting odd values for (1 * value) seconds
obs$.pipe(delayIf(
	value => value % 2 === 1, 
	value => value * 1000)).subscribe(
	value => {
		console.log(value);
	});

Output:
0  2  1  4  6  3  8  10  5  7  9   

Live demo

Try it on stackblitz