m1k3yfoo/flex-panels.html

## flex-panels.html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Flex Panels 💪</title>
  <link href='https://fonts.googleapis.com/css?family=Amatic+SC' rel='stylesheet' type='text/css'>
</head>
<body>
  <style>
    html {
      box-sizing: border-box;
      background:#ffc600;
      font-family:'helvetica neue';
      font-size: 20px;
      font-weight: 200;
    }
    body {
      margin: 0;
    }
    /* '*' adds to all elements and any :before and :after pseudo-elements that they may generate  */
    *, *:before, *:after {
      box-sizing: inherit;
    }

    .panels {
      min-height:100vh;
      overflow: hidden;
      display: flex;
    }

    .panel {
      background:#6B0F9C;
      box-shadow:inset 0 0 0 5px rgba(255,255,255,0.1);
      color:white;
      text-align: center;
      align-items:center;
      /* Safari transitionend event.propertyName === flex */
      /* Chrome + FF transitionend event.propertyName === flex-grow */
      /* Transitioning font-size and flexbox size over 0.7s */
      transition:
        font-size 0.7s cubic-bezier(0.61,-0.19, 0.7,-0.11),
        flex 0.7s cubic-bezier(0.61,-0.19, 0.7,-0.11),
        background 0.2s;
      font-size: 20px;
      background-size:cover;
      background-position:center;
      /* Make the flex items flexboxes that contain other flex items */
      display: flex;
      /* Evenly distribute the remaining space between all panels */
      flex: 1;
      /* Default is stack left to right. Column stacks them top to bottom */
      flex-direction: column;
      justify-content: center; /* Center flex items vertically */
      align-items: center; /* Center flex items horizontally */
    }


    .panel1 { background-image:url(https://source.unsplash.com/gYl-UtwNg_I/1500x1500); }
    .panel2 { background-image:url(https://source.unsplash.com/rFKUFzjPYiQ/1500x1500); }
    .panel3 { background-image:url(https://images.unsplash.com/photo-1465188162913-8fb5709d6d57?ixlib=rb-0.3.5&q=80&fm=jpg&crop=faces&cs=tinysrgb&w=1500&h=1500&fit=crop&s=967e8a713a4e395260793fc8c802901d); }
    .panel4 { background-image:url(https://source.unsplash.com/ITjiVXcwVng/1500x1500); }
    .panel5 { background-image:url(https://source.unsplash.com/3MNzGlQM7qs/1500x1500); }

    /* Selecting flex children */
    .panel > * {
      margin:0;
      width: 100%;
      transition:transform 0.5s;
      border: 1px solid red; /* Makes it easier to see the flexboxes */
      flex: 1 0 auto;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    /* Hide the words in the first row out of view way up top */
    .panel > *:first-child {
      transform: translateY(-100%);
    }
    /* When a class of 'open-active' is added, it slides in from the top */
    .panel.open-active > *:first-child {
      transform: translateY(0);
    }
    /* Hide the words in the 3rd row out of view way down the bottom */
    .panel > *:last-child {
      transform: translateY(100%);
    }
    .panel.open-active > *:last-child {
      transform: translateY(0);
    }

    .panel p {
      text-transform: uppercase;
      font-family: 'Amatic SC', cursive;
      text-shadow:0 0 4px rgba(0, 0, 0, 0.72), 0 0 14px rgba(0, 0, 0, 0.45);
      font-size: 2em;
    }
    .panel p:nth-child(2) {
      font-size: 4em;
    }

    .panel.open {
      font-size:40px;
      /* When it has a class of 'open', it expands 5x of other flex items */
      flex: 5;
    }

  </style>


  <div class="panels">
    <div class="panel panel1">
      <p>Hey</p>
      <p>Let's</p>
      <p>Dance</p>
    </div>
    <div class="panel panel2">
      <p>Give</p>
      <p>Take</p>
      <p>Receive</p>
    </div>
    <div class="panel panel3">
      <p>Experience</p>
      <p>It</p>
      <p>Today</p>
    </div>
    <div class="panel panel4">
      <p>Give</p>
      <p>All</p>
      <p>You can</p>
    </div>
    <div class="panel panel5">
      <p>Life</p>
      <p>In</p>
      <p>Motion</p>
    </div>
  </div>

  <script>
    const panels = document.querySelectorAll('.panel');

    function toggleOpen() {
      // Add the class 'open'
      this.classList.toggle('open');
    }

    function toggleOpenActive(e) {
      // to see all the properties being transitioned
      console.log(e.propertyName);

      if (e.propertyName.includes('flex')) {
        this.classList.toggle('open-active');
      }
    }

    panels.forEach(panel => panel.addEventListener('click', toggleOpen));
    // Once the panel has finished transitioning then we slide in the words
    panels.forEach(panel => panel.addEventListener('transitionend', toggleOpenActive));
  </script>

</body>
</html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Flex Panels 💪</title>
	<link href='https://fonts.googleapis.com/css?family=Amatic+SC' rel='stylesheet' type='text/css'>
	</head>
	<body>
	<style>
	html {
	box-sizing: border-box;
	background:#ffc600;
	font-family:'helvetica neue';
	font-size: 20px;
	font-weight: 200;
	}
	body {
	margin: 0;
	}
	/* '' adds to all elements and any :before and :after pseudo-elements that they may generate /
	, :before, *:after {
	box-sizing: inherit;
	}

	.panels {
	min-height:100vh;
	overflow: hidden;
	display: flex;
	}

	.panel {
	background:#6B0F9C;
	box-shadow:inset 0 0 0 5px rgba(255,255,255,0.1);
	color:white;
	text-align: center;
	align-items:center;
	/* Safari transitionend event.propertyName === flex */
	/* Chrome + FF transitionend event.propertyName === flex-grow */
	/* Transitioning font-size and flexbox size over 0.7s */
	transition:
	font-size 0.7s cubic-bezier(0.61,-0.19, 0.7,-0.11),
	flex 0.7s cubic-bezier(0.61,-0.19, 0.7,-0.11),
	background 0.2s;
	font-size: 20px;
	background-size:cover;
	background-position:center;
	/* Make the flex items flexboxes that contain other flex items */
	display: flex;
	/* Evenly distribute the remaining space between all panels */
	flex: 1;
	/* Default is stack left to right. Column stacks them top to bottom */
	flex-direction: column;
	justify-content: center; /* Center flex items vertically */
	align-items: center; /* Center flex items horizontally */
	}


	.panel1 { background-image:url(https://source.unsplash.com/gYl-UtwNg_I/1500x1500); }
	.panel2 { background-image:url(https://source.unsplash.com/rFKUFzjPYiQ/1500x1500); }
	.panel3 { background-image:url(https://images.unsplash.com/photo-1465188162913-8fb5709d6d57?ixlib=rb-0.3.5&q=80&fm=jpg&crop=faces&cs=tinysrgb&w=1500&h=1500&fit=crop&s=967e8a713a4e395260793fc8c802901d); }
	.panel4 { background-image:url(https://source.unsplash.com/ITjiVXcwVng/1500x1500); }
	.panel5 { background-image:url(https://source.unsplash.com/3MNzGlQM7qs/1500x1500); }

	/* Selecting flex children */
	.panel > * {
	margin:0;
	width: 100%;
	transition:transform 0.5s;
	border: 1px solid red; /* Makes it easier to see the flexboxes */
	flex: 1 0 auto;
	display: flex;
	justify-content: center;
	align-items: center;
	}

	/* Hide the words in the first row out of view way up top */
	.panel > *:first-child {
	transform: translateY(-100%);
	}
	/* When a class of 'open-active' is added, it slides in from the top */
	.panel.open-active > *:first-child {
	transform: translateY(0);
	}
	/* Hide the words in the 3rd row out of view way down the bottom */
	.panel > *:last-child {
	transform: translateY(100%);
	}
	.panel.open-active > *:last-child {
	transform: translateY(0);
	}

	.panel p {
	text-transform: uppercase;
	font-family: 'Amatic SC', cursive;
	text-shadow:0 0 4px rgba(0, 0, 0, 0.72), 0 0 14px rgba(0, 0, 0, 0.45);
	font-size: 2em;
	}
	.panel p:nth-child(2) {
	font-size: 4em;
	}

	.panel.open {
	font-size:40px;
	/* When it has a class of 'open', it expands 5x of other flex items */
	flex: 5;
	}

	</style>


	<div class="panels">
	<div class="panel panel1">
	<p>Hey</p>
	<p>Let's</p>
	<p>Dance</p>
	</div>
	<div class="panel panel2">
	<p>Give</p>
	<p>Take</p>
	<p>Receive</p>
	</div>
	<div class="panel panel3">
	<p>Experience</p>
	<p>It</p>
	<p>Today</p>
	</div>
	<div class="panel panel4">
	<p>Give</p>
	<p>All</p>
	<p>You can</p>
	</div>
	<div class="panel panel5">
	<p>Life</p>
	<p>In</p>
	<p>Motion</p>
	</div>
	</div>

	<script>
	const panels = document.querySelectorAll('.panel');

	function toggleOpen() {
	// Add the class 'open'
	this.classList.toggle('open');
	}

	function toggleOpenActive(e) {
	// to see all the properties being transitioned
	console.log(e.propertyName);

	if (e.propertyName.includes('flex')) {
	this.classList.toggle('open-active');
	}
	}

	panels.forEach(panel => panel.addEventListener('click', toggleOpen));
	// Once the panel has finished transitioning then we slide in the words
	panels.forEach(panel => panel.addEventListener('transitionend', toggleOpenActive));
	</script>

	</body>
	</html>