joefazz

Using Observables for One time Operations

An Observable Problem

Observables are useful for situations where a continuous stream of data needs to be handled... continuously.

However they're annoying and the mental model doesn't make sense when it's a one time data read such as a normal REST API call.

In this kind of situation the idea of calling subscribe() on something which isn't an inherent subscription is a forcing a square into a circle hole kind of situation.

joefazz

# NEW MACHINE SETUP

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# platform
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sudo apt update && sudo apt dist-upgrade
sudo apt install -y apt-transport-https
sudo apt-get install -y build-essential

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joefazz

import React, { useEffect } from 'react';

function usePageVisibility(onVisible, onHidden) {
    const visibilityChange = 'visibilitychange';

    function onVisibilityChange() {
        if (document.hidden) {
            onHidden();
        } else {
            onVisible();