Node JS - EJS Effective JavaScript templating <% = EJS %>

what is EJS 
EJS Effective JavaScript template
E" is for "effective." EJS is a simple templating language that lets you generate HTML markup with plain JavaScript.
 No religiousness about how to organize things. No reinvention of iteration and control-flow. It's just plain JavaScript.

Features
=========
Fast compilation and rendering
Simple template tags: <% %>
Custom delimiters (e.g., use <? ?> instead of <% %>)
Includes
Both server JS and browser support
Static caching of intermediate JavaScript
Static caching of templates
Complies with the Express view system

Installation:
============
It's easy to install EJS with NPM.
$ npm install ejs

e.g:
=====
var ejs = require('ejs'),
    people = ['geddy', 'neil', 'alex'],
    html = ejs.render('<%= people.join(", "); %>', {people: people});

Tags:
====
<% 'Scriptlet' tag, for control-flow, no output
<%= Outputs the value into the template (HTML escaped)
<%- Outputs the unescaped value into the template
<%# Comment tag, no execution, no output
<%% Outputs a literal '<%'
%> Plain ending tag
-%> Trim-mode ('newline slurp') tag, trims following newline

custom Delimeters:
------------------
Custom delimiters can be applied on a per-template basis, or globally:

var ejs = require('ejs'),
    users = ['geddy', 'neil', 'alex'];

// Just one template
ejs.render('<?= users.join(" | "); ?>', {users: users},
    {delimiter: '?'});
// => 'geddy | neil | alex'

// Or globally
ejs.delimiter = '$';
ejs.render('<$= users.join(" | "); $>', {users: users});

Ref: http://ejs.co/