John Resig's Micro-Templating in 140 bytes

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tmpl

John Resig's Micro-Templating in 140 bytes (138 actually).

Please see John's original article for template syntax and more examples.

with (data){ ... } implementation is longer, so the v variable must be used to access the supplied data like this: <%= v.foo || 'No foo' %>

	function(
	a // template string
	){
	return Function( // compile template as a function
	"v,o", // data object is called "v" in templates: <%= v.foo %>
	"o=" + // this variable will aggregate the output
	JSON.stringify(a) // converting template to JavaScript with JSON
	.replace(/<%=(.+?)%>/g, '"+($1)+"') // allow to print data: <%= v.foo \|\| 'No foo' %>
	.replace(/<%(.+?)%>/g, '";$1;o+="') // other logic: <% for (;;) { %> loopy <% } %>
	+ ";return o" // return the evaluated template
	)
	}

function(a){return Function("v,o","o="+JSON.stringify(a).replace(/<%=(.+?)%>/g,'"+($1)+"').replace(/<%(.+?)%>/g,'";$1;o+="')+";return o")}

	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	Version 2, December 2004

	Copyright (C) 2015 Fedia <fedia@psih.ru>

	Everyone is permitted to copy and distribute verbatim or modified
	copies of this license document, and changing it is allowed as long
	as the name is changed.

	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

	0. You just DO WHAT THE FUCK YOU WANT TO.

	{
	"name": "tmpl",

	"description": "John Resig's Micro-Templating in 140 bytes",

	"keywords": [
	"template",
	"render",
	"html",
	"140bytes"
	]
	}

	<!DOCTYPE html>
	<title>John Resig's Micro-Templating in 140 bytes</title>
	<h2>Template</h2>
	<textarea id="tpl" rows="9" cols="99"></textarea>
	<h2>Result <button onclick="test()">Render</button></h2>
	<div id="result"></div>
	<script type="text/template" id="example">
	<b><%= v.title %></b>
	<ul>
	<% for (var i=0; i < v.food.length; i++) { %>
	<li>Item #<%= i + 1 %>: <%= v.food[i] %></li>
	<% } %>
	</ul>
	</script>
	<script>

	var tmpl = function(a){return Function("v,o","o="+JSON.stringify(a).replace(/<%=(.+?)%>/g,'"+($1)+"').replace(/<%(.+?)%>/g,'";$1\no+="')+";return o")};
	var $el = document.querySelector.bind(document);

	var $editor = $el('#tpl'),
	$result = $el('#result');

	$editor.value = $el('#example').text;

	function test() {
	var render = tmpl($editor.value); // compile template
	$result.innerHTML = render({
	title: 'Grocery',
	food: ['apple', 'banana', 'cucumber']
	});
	}
	test();

	</script>