stoplight-event-exercise/README.md

Stoplight Exercise

As always, fork and clone this repo.

Stoplight

Challenge One: Button Click

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.

Challenge Two: Button Toggle

Alter your event listeners to toggle the on/off state of each bulb. All three bulbs can be on or off from now on.

Challenge Three: Group "Hover" Handler

• 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.

• Add new event listeners on each of your buttons that log "Left <textContent> button" when a user mouses out.

• 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.

Bonus Challenge: On/Off Message

• 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"

• 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"

Hints

• Retrieve a DOMElement with document.querySelector or similar method
• Attach event listeners with addEventListener
• Set the color of a bulb with background-color
• Explore the various options of MouseEvent