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36 lines
1.8 KiB
36 lines
1.8 KiB
# Stoplight Exercise
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As always, fork and clone this repo.
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## Stoplight
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#### Challenge One: Button Click
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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.
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#### Challenge Two: Button Toggle
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Alter your event listeners to toggle the on/off state of each bulb. All three bulbs can be on or off from now on.
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#### Challenge Three: Group "Hover" Handler
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* 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.
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* Add new event listeners on each of your buttons that log `"Left <textContent> button"` when a user mouses out.
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* 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.
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#### Bonus Challenge: On/Off Message
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* 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"`
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* 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"`
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## Hints
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* Retrieve a DOMElement with [`document.querySelector`](https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelector) or similar method
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* Attach event listeners with [`addEventListener`](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener)
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* Set the color of a bulb with [`background-color`](https://developer.mozilla.org/en-US/docs/Web/CSS/background-color)
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* Explore the various options of [`MouseEvent`](https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent)
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