STXNext JS recruitment task

Welcome to the STXNext JavaScript recruitment task.

This task was developed in order to test the basic skillset of a JavaScript developer.

The task consists of backend and frontend functionalities.

You don't do backend? Remember that the ability to learn is the most sought quality in a developer!

First, clone this repo and install backend dependencies. Run the backend service.

The application

The goal of the application is to display how stock prices change over time.

In this starter template you get:

• A backend application written in node.js that serves information about stocks (for the last 10 hours).
• A frontend template that renders an empty chart and static spinner.

Getting stock data has a 10% chance of failure (by design). The application needs to account for that.

Mission objectives

• Display the spinner while data is loading. Make the spinner rotate using CSS3.
• Query the backend for list of available stocks.
• Query the backend for data about each stock.
• Hide the spinner after all data is loaded.
• Plot the stock data on the chart (as a line chart).
• Display a chart legend (which line corresponds to which stock).
• Each stock should be plotted visually different (for example in a different colour).
• Display error message if some stock could not be loaded (that stock should not be plotted, but other stocks should still be plotted).
• Describe the chart axes.
• Fix backend to return a meaningful error message when stock data cannot be retrieved (now the request just hangs!).

Constraints

• You are not to modify the code in stocks.js
• The stocks API is designed to return errors sometimes. The application should gain the ability to cope with that.
• You can use the provided mini-API for canvas operations, but you can also use other solution.
• We highly encourage you to use fetch API for making backend queries from the frontend.

Submission

• To submit your solution please generate a patch from your changes and email it back to the STX Next recruiter that contacted you earlier.
• Don't worry if you didn't manage to fulfill all objectives. We will be happy to see partial solutions as well!
• Please don't fork this repository. We wouldn't want other candidates to base their work off your code!