JavaScript Debugging Challenge

If you are giving the interview, you can find instructions in INTERVIEWER.md.

Learning Goals

DOM manipulation
DOM events
Promises
XHR/fetch requests

Introduction

This challenge has you building out an application with prebuilt HTML and some started code. You have access to an Identicon class which creates a unique gravatar on the DOM based on a phrase. You also have a json file which serves as your database for comments associated with the gravatars and its your job to fetch the comments for a gravatar and allow users to submit new comments for them as well.

This challenge has no tests associated with it so be sure to test your code in the browser as you go!

Deliverables

As a user, I can create a gravatar based on a phrase
As a user, I can add a comment to the gravatar
As a user, I can add another comment without refreshing the page

Getting Started

To start, clone down this repo and make sure JSON server is installed:

git clone git@github.com:learn-co-curriculum/instructor-candidate-debugging-challenge-frontend.git
npm i -g json-server

In one console, run the following commands:

cd instructor-candidate-debugging-challenge-frontend
open index.html
json-server --watch db.json

All coding for this challenge will happen in the src/index.js file. No other files need to be changed, but you may be interested in what is in the other files.

Generate the Gravatar

When a user submits the form for the first input, we want it to generate a gravatar on the page. You can achieve this with the following code, making sure to add the appropriate inputString (for example "flatiron"):

new Identicon(inputString)

Render Comments

When a user generates a gravatar, in addition to showing it on the page, the user should also see all comments associated with the gravatar. You can do this by making a fetch GET request to:

`http://localhost:3000/comments?gravatar=${gravatar}`

Once you get the comments, iterate through them and render them to the comments container.

Posting Comments

When a user submits the second form, that comment ought to post to the local server. You can do this by making a fetch POST request to:

`http://localhost:3000/comments`

For the request, use these headers:

{
  'Content-Type': 'application/json',
  'Accept': 'application/json'
}

Additionally, the new comment should render as the last comment in the comments container for that gravatar.

Checking the Code in the Browser

We should check our changes to index.js in the browser. Remember to use console.log and the debugger liberally in order to check your assumptions when fixing bugs!