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path: root/index.html
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<style>
body.loading { opacity: 0 }
body { font-size: 20px; transition: opacity 0.1s; }
label { min-width: 50px; display: inline-block; text-align: right; }
input { text-align: right; }
#numbers, #buttons { float: left; margin: 20px; }
#buttons { margin: 20px; }
button { font-size: 200%; }
</style>

<body class="loading">

  <div id="numbers">
	  <script type="text/html" id="number-template">
		  <div>
			  <label for="base-{{base}}">{{base}}</label>
				<input id="base-{{base}}" type="text">
			</div>
		</script>
	</div>

  <div id="buttons">
	  <button id="add">+</button>
	  <button id="sub">-</button>
	  <button id="inv">(-)</button>
	</div>
</body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<script src="./index.js"></script>
<script>
var MAX_BASE = 16
var $inputs = {}
var template = $("#number-template").html()
function init () {
  iter(build)
	bind()
	rebuild(0)
  $("body").removeClass("loading")
}
function bind () {
  $("#add").click(add)
  $("#sub").click(sub)
  $("#inv").click(inv)
}
function build (base) {
  var $div, $input
	$div = $(template.replace(/{{base}}/g, base))
	$input = $div.find("input")
	$input.on("input", function(){
	  var n = basic.toNumber( $input.val(), base )
	  if (isNaN(n)) {
		  return
		}
		rebuild(n, base)
	})
	$inputs[base] = $input
  $("#numbers").prepend($div)
}
function rebuild (n, base) {
  iter(function(i){
		if (i == base) return
		var $i = $inputs[i]
		var v = basic.toString(n, i)
		$i.val(v)
  })
}
function iter (f) {
  for (var i = -MAX_BASE; i <= MAX_BASE; i++) {
    if (basic.validate_base(i)) {
	    f(i)
	  }
	}
}
function current () {
  var n = basic.toNumber( $inputs[2].val(), 2 )
	if (isNaN(n)) n = 2
	return n
}
function add () {
	rebuild( current() + 1 )
}
function sub () {
	rebuild( current() - 1 )
}
function inv () {
	rebuild( current() * -1 )
}

init()
</script>