Preparation code

<div>
  <ul id="list">
    <li class="first">
    </li>
    <li>
    </li>
  </ul>
</div>
<div class="first">
</div>
<script>
var re = new RegExp("^(\W)?(.*)");
var $$ = function(
  a,                         // take a simple selector like "name", "#name", or ".name", and
  b                          // an optional context, and
){
  a = a.match(re); // split the selector into name and symbol.
  return(                    // return an element or list, from within the scope of
    b                        // the passed context
    || document              // or document,
  )[
    "getElement" + (         // obtained by the appropriate method calculated by
      a[1]
        ? a[1] == "#"
          ? "ById"           // the node by ID,
          : "sByClassName"   // the nodes by class name, or
        : "sByTagName"       // the nodes by tag name,
    )
  ](
    a[2]                     // called with the name.
  )
}

$id = function(id) {
  return document.getElementById(id);
}
$tag = function(tag) {
  return document.getElementsByTag(tag);
}
$class = function(name) {
  return document.getElementsByClassName(name);
}
$extra=  function(selector, context)
{
  var a = context || document;
  switch(selector[0]){
     case '#': return a.getElementById(selector.slice(1));
     case '.': return a.getElementsByClassName(selector.slice(1));
  }
  return a.getElementsByTagName(selector);
}

</script>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

Preparation code output

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var list = $$('#list')

var list = $('#list')

var list = document.getElementById('list')

var list = $id('list')

var list = $extra('#list')

var list = $extra('li')

var list = $('li')

var list = $$('li')

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by Manuel Astudillo on 5th January 2013
• Revision 2: published on 5th January 2013
• Revision 3: published on 5th January 2013
• Revision 4: published on 15th January 2013

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