TrackMe | time GPS tracking system , with social features

I understand that there are no pointers in Javascript.

I have the following problem though and I am wondering if there is a solution that eludes me. The solution maybe vanilla Javascript, or React.js hooks like the Context API (useContext), or combination of more Javascript and React, or the solution might be for me to go back to the drawing board.

Please keep in mind I am introducing React.js to a frontend that used jQuery over prior years of development. My real situation is actually a multi-form wizard component that uses jQuery for Next/Previous stepping and animations.

Please do not think that I am actually trying to mix jQuery with React.js just do something like: $('#myBtn').click in jQuery.

My actual event in my software is not "a when trackMe changes event" so useEffect will not help here. Th software is a multi-form wizard, the actual event is the previous/next button press and the callback needs to know the current value of trackMe.

Here is an a simple React Functional Component demonstrating my problem:

I have an Android application that statrts with a ProgressDialog and when it connects it starts a timer. The app crashes sometimes and I'm getting the below error:

I am sending a post request from my node.js web app to my API. The data that I am sending to my API via post is two strings name and password. At the API end, it is receiving undefined for both strings. I cannot figure out why it is doing this.

Below is my package.json to show relevant packages being used:

I am developing an app to track users live location.I have the updated positions from geolocator plugin.when i get new positions i change the pin position.But it is not changing in the map.Here is the code,

this method is called in every 1 sec

I am having an issue with messaging in my chrome extension. I am passing a message from a content script to a background page/javascript. My background page has a form. As part of my background.js I am completing some input fields and then submitting the form.

This all appears to be working the first time I load up my chrome extension. My background form is submitted. However, I am not getting a success message in the console for my content script any subsequent message from the content script results in an error being logged in the console. The error message it "Error in event handler for (unknown): TypeError: Cannot read property 'message' of undefined".

I have noticed that if I comment the form submit line from my background javascript there is no problem with submitting multiple messages. This points to the form submit causing the problem. I can not work out, however, what the problem may be. Any help would be very much appreciated.

A snip of my content script, logging the message:

While working with firebase UI I am getting Unable to find explicit activity class com.firebase.ui.auth.KickoffActivity

I am trying to add a function decorator to a function expression. The decorator works for function declarations but not for function expressions.

Decorator:

So, I'm using OpenLayers 4 and trying to get the User location to set a marker on the map. On localhost it works fine, it tracks user's location and set the marker on the map But when I acess the site via local ip from another device it don't even ask the permission to use the GPS.

Here is the code:

I need to pass some data that I grab when the app comes back into the foreground, I have managed to trigger the method but I can't figure out how to trigger it in the existing instance of my ViewController rather than making a new instance.

Map.cs