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Meta templates / Double Template for Node.js

I have checked many templates and not found a really stright forwared simple templets script. So i decided to write my own.

The idea is to have a template like php mixed with html.

A template that processed twice:

  • 1st time prepeared with static data
  • 2nd time - each time a request is made.

The template is compiled at runtime when preloaded in to a simple javascript funciton.

My requirement was a minimal learning curve.

The template is planed for nodejs to be prepeared once and used many times.

I decided on <??> tags for runtime part of the template.

I decided on <%%> tags for prepeare part of the template.

example template:

  hello <? if(myvar) { ?><?=myvar?><? } else { ?> world<? }?>

A complex template example with calling other template and recursion,

A website with satic recusive menu and dynamic content in the center

 <html>
  <head><title>complex template example</title></head>
  <body>
   <table width="100%" border="0" cellspacing="0" cellpadding="0">
       <tr>
         <td dir="rtl" style="padding:10px;text-align:right;direction:rtl">
         
         <?=content?>
         
         </td>
         <td dir="rtl" width="225" bgcolor="#ccd5f4" style="padding:10px;text-align:right;direction:rtl">
          <%
           function print_menu(menu1)
           {
            var echo; //redefine local echo variable
            for(link in menu1)
            {
             echo+='<?link='+JSON.stringify(link)+'?>';
             %>
             <ul>
              <li><a href="<?=link.href?>"><?=link.name?></a></li>
              <%=print_menu(menu1)%>
             </ul>
             <%
            }
            return echo;
           }
           echo+=print_menu(menu); // echo is defined in the begining of the function 
                                   // and returned at the end of the function. 
          %>
         </td>
       </tr>
   </table>

  <%=this.templates.footer(vars); 
   // vars is an argument of the template function,  it is extracted at the begining of function.
   // it calls for other template , with same variable you have in this function
   // for more information see buildtemplate function below.
  %>
  </body>
 </html>

to include in in nodejs I use:

  var te = require('doubletemplate');  //load double teplate module
  var doubletemplate=te.doubletemplate; // export double template function to global

example of useing parsedir function:

  te.parsedir(__dirname+'/templates',{'app':app});

example of useing loadfile function:

  te.loadfile(__dirname+'/templates/filename.html',{'app':app},__dirname);

in the code you can use:

  te.templates['subdir/filename.html']({'app':app});

the code is in stright forward logic you can read it and understand how it works.

todo:

  • to add parsing of first ; position for output shortcut tag to allow easyier convertion to non bloking style if needed.
  • later I plan to rewrite it to support html paritials with sizzle css selector. like styling html with paritial html.
  • later I plan to enhance the api and the module structure. for now what is here is enought for me.

by Shimon Doodkin, helpmepro1@gmail.com http://github.com/shimondoodkin/nodejs-meta-templates