handlebars-group-by

Handlebars helper which allows you to group lists by a property of each item.

Install

With Node.js:

$ npm install handlebars-group-by

With Bower:

$ bower install shannonmoeller/handlebars-group-by

Helper

{{#group [list] by=[property]}}

• list Array - Array whose items should be grouped together.
• by String - The name of the property by whose value items should be grouped.

Data:

{
    posts: [
        { year: 2014, title: 'foo', body: 'foo bar' },
        { year: 2014, title: 'bar', body: 'bar baz' },
        { year: 2014, title: 'baz', body: 'baz bat' },
        { year: 2015, title: 'bat', body: 'bat qux' },
        { year: 2015, title: 'qux', body: 'qux foo' }
    ]
}

Template:

{{#group posts by="year"}}
    <h1>{{ value }}</h1>
 
    {{#each items}}
        <h2>{{ title }}</h2>
        <p>{{ body }}</p>
 
    {{/each}}
{{/group}}

Output:

<h1>2014</h1>
 
<h2>foo</h2>
<p>foo bar</p>
 
<h2>bar</h2>
<p>bar baz</p>
 
<h2>baz</h2>
<p>baz bat</p>
 
<h1>2015</h1>
 
<h2>bat</h2>
<p>bat qux</p>
 
<h2>qux</h2>
<p>qux foo</p>

Api

Helpers are registered by passing in your instance of Handlebars. This allows you to selectively register the helpers on various instances of Handlebars.

groupBy(handlebars)

• handlebars Handlebars - An instance of Handlebars.

var handlebars = require('handlebars'),
    groupBy = require('handlebars-group-by');
 
groupBy(handlebars);

groupBy.register(handlebars)

• handlebars Handlebars - An instance of Handlebars.

Helpers are also exposed via a register method for use with Assemble.

var handlebars = require('handlebars'),
    groupBy = require('handlebars-group-by');
 
groupBy.register(handlebars);
 
// or
 
grunt.initConfig({
    assemble: {
        options: {
            helpers: ['path/to/handlebars-group-by.js']
        }
    }
});

Contribute

Standards for this project, including tests, code coverage, and semantics are enforced with a build tool. Pull requests must include passing tests with 100% code coverage and no linting errors.

Test

$ gulp test

License

MIT