MagJS - reversing thousands of rows

<!DOCTYPE html>
<html>

<head>
  <link rel="stylesheet" href="style.css">
  <meta charset="utf-8">
  <title>Mag.JS</title>
</head>

<body>

  <nav>
    <h1>Hello Mag.JS!</h1>
    <a target="_tab" href="https://github.com/magnumjs/mag.js">GitHub</a>
  </nav>

  <article class="card">
    <header>
      <h2>Lots of Things!</h2>
    </header>

    <footer>

      <!-- REPEATER -->
      <div id="repeater">
        <h1>Riot <button>Reverse</button> <timeTaken></timeTaken></h1>
        <div id="data"> Loading..
          <span id="magjsappMountNode2">
            <timeTaken></timeTaken>
        <h2 class="magjsdata hide">Line #<span class="num"></span></h2>
          </span>
        </div>
      </div>
      <!-- REPEATER -->
      <hr/>

    </footer>
  </article>


   <script src="//rawgit.com/magnumjs/mag.js/master/mag-latest.min.js"></script> 

  <script src="app.js"></script>

</body>

</html>

var items = [];

for (var i = 0; i < 5000; i++) {
  items.push({
    num: i
  });
}


var magjsdataNode = {
  controller: function(props) {
    this.h2 = {
      _class: "magjsdata"
    }

    this.willload = function(node) {
      this.startTime = performance.now()
    }
    this.didload = function(node) {
      var msg = node.id + ': - Loading ' + props.items.length + ' rows took ' + (performance.now() - this.startTime).toFixed(2) + 'ms';
      this.state.timeTaken = msg;
    }
    this.willupdate = function(node) {
      if (this.props.isReversing) this.startTime = performance.now()
    }
    this.didupdate = function(node) {
      if (this.props.isReversing) {
        var msg = node.id + ': - Reversing ' + props.items.length + ' rows took ' + (performance.now() - this.startTime).toFixed(2) + 'ms';
        this.state.timeTaken = msg;
      }
    }
  },
  view: function(state, props) {
    state.magjsdata = props.items.map(function(data) {
      return {
        num: data.num
      }
    });
  }
}


var data = mag("magjsappMountNode2", magjsdataNode, {
  key: 55
});


var demo = {};

demo.controller = function(props) {
  this.button = {}

  this.items = props.items.slice();
  this.willload = function(node) {
    this.startTime = performance.now()
  }
  this.didload = function(node) {
    var msg = node.id + ': - Loading ' + this.state.items.length + ' rows took ' + (performance.now() - this.startTime).toFixed(2) + 'ms';
    this.state.timeTaken = msg;
  }
  this.willupdate = function(node) {
    if (this.state.button._disabled) this.startTime = performance.now()
  }
  this.didupdate = function(node) {
    if (this.state.button._disabled) {
      var msg = node.id + ': - Reversing ' + this.state.items.length + ' rows took ' + (performance.now() - this.startTime).toFixed(2) + 'ms';
      this.state.timeTaken = msg;
      this.state.button._disabled = false;
    }
  }
}

demo.view = function(state, props) {

  state.data = data({
    items: state.items,
    isReversing: state.button._disabled
  })

  state.button._onclick = function() {
    state.button._disabled = true;
    state.items.reverse();
  }
}

var props = {
  items: items
}

mag.rafBounce=1

mag.module("repeater", demo, props)

li:empty,
.hide {
  display: none;
}

a {
  display: block;
}

a:after {
  content: " \bb";
}

.mainButton {
  font-size: 1.5em;
}

nav a {
  float: right;
  margin-top: -50px;
}

body {
  background: #fff;
  text-align: left;
  width: 90%;
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 0 0;
}

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3em;
  padding: 0 .6em;
  background: #fff;
  box-shadow: 0 0 0.2em rgba(17, 17, 17, 0.2);
  z-index: 10000;
  transition: all .3s;
  transform-style: preserve-3d;
}

header {
  font-weight: bold;
  position: relative;
  border-bottom: 1px solid #eee;
  padding: .6em .8em;
}

footer {
  padding: .8em;
}

article {
  top: 100px;
}

.card {
  max-width: 100%;
  display: block;
  position: relative;
  box-shadow: 0;
  border-radius: .2em;
  border: 1px solid #ccc;
  overflow: hidden;
  text-align: left;
  background: #fff;
  margin-bottom: .6em;
  padding: 6px;
  transition: all .3s ease;
}

#Mag.JS

## plunk boilerplate of "Things"

Basic Mag.JS boilerplate to count and create a list of things dynamically.