d3visual/traffic2.htm at master · masahmad/d3visual · GitHub

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<html>

<head>
<title>d3 js test</title>

<style>


body {
  font-family: sans-serif;
}

#controlPanel {
  float: left;
  padding-top: 30px;
}

.button {
  background-color: gray;
  color: white;
  border-radius: 10px;
  padding: 20px;
  text-align: center;
  margin: 90px 40px;
  cursor: pointer;
}

#traffic-light {
  height: 550px;
  width: 200px;
  float: left;
  background-color: #333;
  border-radius: 40px;
  margin: 30px 0;
  padding: 20px;
}

.bulb {
  height: 150px;
  width: 150px;
  background-color: #111;
  border-radius: 50%;
  margin: 25px auto;
  transition: background 500ms;
}

</style>

</head>
<body>
<div id="controlPanel">
  <h1 id="stopButton" class="button">Stop</h1>
  <h1 id="slowButton" class="button">Slow</h1>
  <h1 id="goButton" class="button">Go</h1>
</div>
<div id="traffic-light">
  <div id="stopLight" class="bulb"></div>
  <div id="slowLight" class="bulb"></div>
  <div id="goLight" class="bulb"></div>
</div>
<script>

document.getElementById('stopButton').onclick = illuminateRed;
document.getElementById('slowButton').onclick = illuminateYellow;

function illuminateRed() {
  clearLights();
  document.getElementById('stopLight').style.backgroundColor = "red";
}

function illuminateYellow() {
  clearLights();
  document.getElementById('slowLight').style.backgroundColor = "purple";
}

function clearLights() {
  document.getElementById('stopLight').style.backgroundColor = "black";
  document.getElementById('slowLight').style.backgroundColor = "black";
  document.getElementById('goLight').style.backgroundColor = "black";
}

</script>


</body>

</html>