Improve the README

README.md

@@ -1,36 +1,41 @@
 # Stoplight Exercise
 
-As always, fork and clone this repo. Submit a Pull Request when you are done.
+As always, fork and clone this repo.
 
-## Stoplight
+![Screenshot of the stop bulb lit up](screenshot.png)
 
-#### Challenge One: Button Click
+#### Part 1
 
-Wire up the controls to the left of the stoplight so that when a button is clicked, the corresponding bulb will turn on and all others will turn off.
+Add JavaScript DOM event listeners to toggle the on/off state of three bulbs.
 
-#### Challenge Two: Button Toggle
+- When a user clicks on the "Stop" button, the top bulb should turn `red`.
+- When a user clicks on the "Slow" button, the middle bulb should turn `orange`.
+- When a user clicks on the "Go" button, the bottom bulb should turn `green`.
 
-Alter your event listeners to toggle the on/off state of each bulb. All three bulbs can be on or off from now on.
+**TIP**: All three bulbs can be on/off independently of one another.
 
-#### Challenge Three: Group "Hover" Handler
+##### Resources
 
-* Keep your existing code, but add new event listeners on each of your buttons that log `"Entered <textContent> button"` when a user mouses over a button.
+- [MDN - `Document.querySelector()`](https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelector)
+- [MDN - `EventTarget.addEventListener()`](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener)
+- [MDN - `click`](https://developer.mozilla.org/en-US/docs/Web/Events/click)
+- [MDN -  `background-color`](https://developer.mozilla.org/en-US/docs/Web/CSS/background-color)
 
-* Add new event listeners on each of your buttons that log `"Left <textContent> button"` when a user mouses out.
+#### Part 2
 
-* Add a single event listener on all three buttons as a group. In your group event handler, log the `textContent` of each button when a user clicks the button.
+Add new event listeners to log the mouse state of each button.
 
-#### Bonus Challenge: On/Off Message
+- When a user's mouse "enters" a button, log `"Entered <textContent> button"` to the console.
+- When a user's mouse "leaves" a button, log `"Left <textContent> button"` to the console.
 
-* If the corresponding bulb is off when a user clicks a button, change the log message in your group event listener to say `"<textContent> bulb on"`
+##### Resources
 
-* If the corresponding bulb is on when a user clicks a button, change the log message in your group event listener to say `"<textContent> bulb off"`
+- [MDN - `mouseenter`](https://developer.mozilla.org/en-US/docs/Web/Events/mouseenter)
+- [MDN - `mouseleave`](https://developer.mozilla.org/en-US/docs/Web/Events/mouseleave)
 
-![Screenshot of the stop bulb lit up](screenshot.png)
+#### Bonus
 
-## Hints
+Add **one** new event listener to log the state of each bulb.
 
-* Retrieve a DOMElement with [`document.querySelector`](https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelector) or similar method
+- When a user clicks a button that just turned on, log`"<textContent> bulb on"` to the console.
-* Attach event listeners with [`addEventListener`](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener)
+- When a user clicks a button that just turned off, log`"<textContent> bulb off"` to the console.
-* Set the color of a bulb with [`background-color`](https://developer.mozilla.org/en-US/docs/Web/CSS/background-color)
-* Explore the various options of [`MouseEvent`](https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent)

index.js

@@ -1,14 +1,3 @@
-/*
-  Write JS to make this stoplight work.
-
-  When I click on the 'stop' button,
-    the top light should turn red.
-  When I click on the 'slow' button
-    the middle light should turn orange.
-  When I click on the 'go' button
-    the bottom light should turn green.
-*/
-
 (function() {
   'use strict';
 
@@ -22,13 +11,26 @@
 
   const controls = document.querySelector('#controls');
 
-  // stopButton
+  // part 1
   stopButton.addEventListener('click', () => {
     const color = stopLight.style.backgroundColor === 'red' ? '' : 'red';
 
     stopLight.style.backgroundColor = color;
   });
 
+  slowButton.addEventListener('click', () => {
+    const color = slowLight.style.backgroundColor === 'orange' ? '' : 'orange';
+
+    slowLight.style.backgroundColor = color;
+  });
+
+  goButton.addEventListener('click', () => {
+    const color = goLight.style.backgroundColor === 'green' ? '' : 'green';
+
+    goLight.style.backgroundColor = color;
+  });
+
+  // part 2
   stopButton.addEventListener('mouseenter', (event) => {
     console.log(`Entered ${event.target.textContent} button`);
   });
@@ -37,13 +39,6 @@
     console.log(`Left ${event.target.textContent} button`);
   });
 
-  // slowButton
-  slowButton.addEventListener('click', () => {
-    const color = slowLight.style.backgroundColor === 'orange' ? '' : 'orange';
-
-    slowLight.style.backgroundColor = color;
-  });
-
   slowButton.addEventListener('mouseenter', (event) => {
     console.log(`Entered ${event.target.textContent} button`);
   });
@@ -52,13 +47,6 @@
     console.log(`Left ${event.target.textContent} button`);
   });
 
-  // goButton
-  goButton.addEventListener('click', () => {
-    const color = goLight.style.backgroundColor === 'green' ? '' : 'green';
-
-    goLight.style.backgroundColor = color;
-  });
-
   goButton.addEventListener('mouseenter', (event) => {
     console.log(`Entered ${event.target.textContent} button`);
   });
@@ -67,7 +55,7 @@
     console.log(`Left ${event.target.textContent} button`);
   });
 
-  // controls
+  // bonus
   controls.addEventListener('click', (event) => {
     if (event.target === controls) {
       return;