Best-of-breed templating in browser or on Node.js (with Express 4, Hapi and Browserify integration)
npm install jsrender$ bower install jsrender
$.views, $.templates and $.render to the jQuery namespace object, $ (or window.jQuery).
jsrender (or window.jsrender)
jsrender namespace provides the same methods/APIs as with jQuery, so if jQuery is not present you can still use all the API examples, by simply writing:
js
var $ = window.jsrender;
// Now use code as in samples/examples, with $.views... $.templates... $.render...
`
(Note: If jQuery is not loaded, then passing a jQuery selector to $.templates() will only work for the ID selector)
Example HTML page: JsRender without jQuery
#### JsRender on Node.js
JsRender can be used to render templates on the server (using Node.js) as well as in the browser. JsRender on Node.js has all the features and APIs of JsRender in the browser, plus some additional ones specific to Node.js.
It also provides built-in Express, Hapi and Browserify integration -- which makes it easy to register templates as simple .html files on the file system, and then load and render them either server-side, client-side or both.
Learn more: JsRender Node.js Quickstart and JsRender APIs for Node.js.
Code samples: See JsRender Node Starter for running code examples of Node.js scenarios, including with Express, Hapi and Browserify.
JsRender usage
$3
From a string:
`js
var tmpl = $.templates("Name: {{:name}}");
`
From a template declared as markup in a script block:
`html
`
then, somewhere in your script:
`js
var tmpl = $.templates("#myTemplate"); // Pass in a jQuery selector for the script block
`
On Node.js, from an .html file containing the template markup:
`js
var $ = require('jsrender'); // returns the jsrender namespace object
var tmpl = $.templates("./templates/myTemplate.html");
`
Learn more...
$3
tmpl.render(object) (or shortcut form: tmpl(object)) renders the template with the object as data context.
`js
var tmpl = $.templates(" Name: {{:name}}
");
var person = {name: "Jim"};
// Render template for person object
var html = tmpl.render(person); // ready for insertion, e.g $("#result").html(html);
// result: "Name: Jim
"
`
tmpl.render(array) (or tmpl(array)) renders the template once for each item in the array.
`js
var people = [{name: "Jim"}, {name: "Pedro"}];
// Render template for people array
var html = tmpl.render(people); // ready for insertion...
// result: "Name: Jim
Name: Pedro
"
`
Learn more...
$3
`js
// Register named template - "myTmpl1
$.templates("myTmpl1", "Name: {{:name}}
");
var person = {name: "Jim"};
// Render named template
var html = $.templates.myTmpl1(person);
// Alternative syntax: var html = $.render.myTmpl1(person);
// result: "Name: Jim
"
`
Learn more...
$3
#### Template tag syntax
- All tags other than {{: ...}} {{> ...}} {{ ...}} {{!-- --}} behave as block tags*
- Self-closing tag - no content (empty): {{someTag .../}}
- A particular case of self-closing syntax is when any block tag uses the named parameter tmpl=... to reference an external template, which then replaces what would have been the block content:
- Self-closing block tag referencing an external template: {{someTag ... tmpl=.../}}
(This lets you do template composition. See example.)
- Tags can take both unnamed arguments and named parameters:
- {{someTag argument1 param1=...}} content {{/someTag}}
- an example of a named parameter is the tmpl=... parameter mentioned above
- arguments and named parameters can be assigned values from simple data-paths such as address.street or from richer expressions such as product.quantity * 3.1 / 4.5, or name.toUpperCase()
Learn more...
#### Built-in tags
#### _{{: ...}}_ (Evaluate)
{{: pathOrExpr}} inserts the value of the path or expression.
`js
var data = {address: {street: "Main Street"} };
var tmpl = $.templates("Street: {{:address.street}}");
var html = tmpl.render(data);
// result: "Street: Main Street"
`
Learn more...
#### _{{> ...}}_ (HTML-encode)
{{> pathOrExpr}} inserts the HTML-encoded value of the path or expression.
`js
var data = {condition: "a < b"};
var tmpl = $.templates("Formula: {{>condition}}");
var html = tmpl.render(data);
// result: "Formula: a < b"
`
Learn more...
#### _{{include ...}}_ (Template composition - partials)
{{include pathOrExpr}}...{{/include}}evaluates the block content against a specified/modified data context.
{{include ... tmpl=.../}} evaluates the specified template against an (optionally modified) context, and inserts the result. (Template composition).
`js
var data = {name: "Jim", address: {street: "Main Street"} };
// Register two named templates
$.templates({
streetTmpl: "{{:street}}",
addressTmpl: "{{:name}}'s address is {{include address tmpl='streetTmpl'/}}."
});
// Render outer template
var html = $.templates.addressTmpl(data);
// result: "Jim's address is Main Street"
`
Learn more...
#### _{{for ...}}_ (Template composition, with iteration over arrays)
{{for pathOrExpr}}...{{/for}}evaluates the block content against a specified data context. If the new data context is an array, it iterates over the array, renders the block content with each data item as context, and concatenates the result.
{{for pathOrExpr tmpl=.../}} evaluates the specified template against a data context. If the new data context is an array, it iterates over the array, renders the template with each data item as context, and concatenates the result.
`html
`
`js
var data = {people: [{name: "Jim"}, {name: "Pedro"}] };
var tmpl = $.templates("#peopleTmpl");
var html = tmpl.render(data);
// result: " - Name: Jim
- Name: Pedro
"
`
Learn more...
#### _{{props ...}}_ (Iteration over properties of an object)
{{props pathOrExpr}}...{{/prop}} or {{props pathOrExpr tmpl=.../}} iterates over the properties of the object returned by the path or expression, and renders the content/template once for each property - using as data context: {key: propertyName, prop: propertyValue}.
`html
`
`js
var data = {person: {first: "Jim", last: "Varsov"} };
var tmpl = $.templates("#personTmpl");
var html = tmpl.render(data);
// result: " - first: Jim
- last: Varsov
"
`
Learn more...
#### _{{if ...}}_ (Conditional inclusion)
{{if pathOrExpr}}...{{/if}} or {{if pathOrExpr tmpl=.../}} renders the content/template only if the evaluated path or expression is 'truthy'.
{{if pathOrExpr}}...{{else pathOrExpr2}}...{{else}}...{{/if}} behaves as 'if' - 'else if' - 'else' and renders each block based on the conditions.
`html
`
`js
var data = {nickname: "Jim", name: "James"};
var tmpl = $.templates("#personTmpl");
var html = tmpl.render(data);
// result: "Nickname: Jim"
`
Learn more...
#### Other built-in tags
For details on all the above built-in tags, as well as comment tags _{{!-- ... --}}_ and allow code tags _{{\ ... }} and {{\: ...}}_, see the tags documentation on jsviews.com.
#### Custom tags
Creating your own custom tags is easy. You can provide an object, with render method, template, event handlers, etc. See samples here and here on jsviews.com. But for simple tags, you may only need a simple render function, or a template string.
For example the two following definitions for a {{fullName/}} tag provide equivalent behavior:
As a render function:
`js
$.views.tags("fullName", function(val) {
return val.first + " " + val.last;
});
`
Or as a template string:
`js
$.views.tags("fullName", "{{:first}} {{:last}}");
`
Either way, the result will be as follows:
`js
var tmpl = $.templates("{{fullName person/}}");
var data = {person: {first: "Jim", last: "Varsov"}};
var html = tmpl.render(data);
// result: "Jim Varsov"
`
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For details on helpers, see the Helpers documentation topic on jsviews.com.
Here is a simple example. Two helpers - a function, and a string:
`js
var myHelpers = {
upper: function(val) { return val.toUpperCase(); },
title: "Sir"
};
`
Access the helpers using the ~myhelper syntax:
`js
var tmpl = $.templates("{{:~title}} {{:first}} {{:~upper(last)}}");
`
We can pass the helpers in with the render() method
`js
var data = {first: "Jim", last: "Varsov"};
var html = tmpl.render(data, myHelpers);
// result: "Sir Jim VARSOV"
`
Or we can register helpers globally:
`js
$.views.helpers(myHelpers);
var data = {first: "Jim", last: "Varsov"};
var html = tmpl.render(data);
// result: "Sir Jim VARSOV"
`
Learn more...
$3
Converters are used with the {{:...}} tag, using the syntax {{mycvtr: ...}}}.
Example - an upper converter, to convert to upper case:
`js
$.views.converters("upper", function(val) { return val.toUpperCase(); });
var tmpl = $.templates("{{:first}} {{upper:last}}");
var data = {first: "Jim", last: "Varsov"};
var html = tmpl.render(data);
// result: "Jim VARSOV"
`
Learn more...
$3
JsRender supports rich expressions and logic, but at the same time encapsulates templates to prevent random access to globals. If you want to provide access to global variables within a template, you have to pass them in as data or as helpers.
You can assign rich expressions to any template arguments or parameters, as in:
{{:person.nickname ? "Nickname: " + person.nickname : "(has no nickname)"}}
or
`html
{{if ~limits.maxVal > (product.price*100 - discount)/rate}}
...
{{else ~limits.minVal < product.price}}
...
{{else}}
...
{{/if}}
``