$ npm install jazz
Jazz is a simple template engine built specifically for nodejs.
Usage
var jazz = require("jazz");
var template = jazz.compile("my template source code {someVariable}");
template.eval({"someVariable": "lolmuffin"}, function(data) { sys.puts(data); });
This example would output the following:
my template source code lolmuffin
Syntax
Printing variables
{someVariable}
This works for any type of expression, so the following should also work:
{users.fred}
{"hello"}
{45}
{a eq b}
Filter functions
You can call filter functions like so:
{someFilter(arg1, arg2)}
Filter functions are statements, NOT expressions so they cannot be chained nor used in if/forelse/etc. tests. However, calls can be made on any type of expression -- e.g.
{math.sin(45)}
Implementing filter functions
Filter functions may block so rather than returning the value you want rendered as you might in other frameworks, jazz passes in a callback to your filter function that you then call to indicate that you have a result. e.g. here we simulate a blocking operation using setTimeout().
// sum.jazz
{sum(5, 10)}
// sum.js
var jazz = require("jazz");
var params = {
sum: function(arg1, arg2, cb) {
setTimeout(function() {
cb((arg1 + arg2).toString());
}, 2000);
}
}
jazz.compile("sum.jazz").eval(params, function(output) { console.log(output); });
Note that even though the execution of the callback is delayed, this example still works.
Conditional Statements
You can check if a variable evaluates to a true value like so:
{if name}
Hello, {name}
{end}
Else clauses are also supported:
{if name}
Hello, {name}
{else}
Hello, Captain Anonymous
{end}
As are else..if clauses:
{if firstName}
Hello, {firstName}
{elif lastName}
Hello, Mr. {lastName}
{else}
Hello, Captain Anonymous
{end}
Limited logical expressions are also possible:
{if user.lastName and user.isVip}
Hello, Mr. {user.lastName}, my good man!
{end}
{if fred.tired or fred.bored}
Fred: "Yawn!"
{end}
{if not awake}
Zzz
{end}
eq & neq comparison operators are available for comparing two values:
{if config.feature eq "enabled"}
Feature is enabled!
{end}
{if status neq "inactive"}
Huzzah!
{end}
You can also group expressions using parentheses:
{if (a and b) or c}
...
{end}
Looping over an array
{foreach item in someArray}
<p>{item}</p>
{end}
The value being iterated over can be any expression supporting an Array-like interface.
Current Tags
- 0.0.18 ... latest (13 years ago)
cliffano