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Geta product filter

A JavaScript plugin that connects to your API and renders a product filter with custom HTML.


Use this plugin if you have a server-side api that returns search facets and products.
Works with "any" json-api; the plugin itself doesn't expect the response to be in any particular format.

Don't use this plugin if you want't to use client-side filtering without a server-side api.

Getting started

Install from NPM

npm install geta-product-filter --save

Include CSS and JavaScript

<link rel="stylesheet" href="node_modules/geta-product-filter/dist/index.css">
<script src="node_modules/geta-product-filter/dist/index.js"></script>

Write a HTML template

Use Handlebars to render data from an api

<div data-filter class="filter">
    <script data-filter-template type="text/x-handlebars-template">
        <div class="filter-form-counter">
            {{response.products.length}} products

See an example of a template that renders html from a json response.

See a complete list of html data-attributes that should be included in the template.

Initialize the JavaScript

var element = document.querySelector('[data-filter]');
var options = {};
var filter = new window.Filter(element, options);



string, required

An api endpoint that returns json with form facets and a list of products


object, optional

Options to be passed to jQuery Ajax


object, optional

An object with a response from the api. Use this to avoid having to call the api asynchronously after the JavaScript has initialized. Improves performance and SEO.

Alternatively, use server-side-rendering.


function, optional

A function that converts parameters before they are sent back to the api.


function, optional

A function that converts parameters before they are displayed in the url


function, optional

Transform the json from the api before rendering the template.


function, optional

A callback that runs every time the html template has rendered.

Use this for accessing the dom.

new window.Filter(element, {
    rendered: function(element){
        console.log(element); // An element that contains the rendered template html


string, optional

A css class that will be added to the container element whenever an ajax request is in progress.

Default: filter--loading



Performs a new search and updates the url an ui.

Useful for updating the url and ui manually, e.g. when clicking an external button.

Example 1: request all red products

var filter = new window.Filter(element, options);
filter.navigate({color: 'red'});

Example 2: request all red and blue products that belong to My Brand

var filter = new window.Filter(element, options);
filter.navigate({color: ['red', 'blue'], brand: 'My Brand'})

Server-side rendering

This package does not provide methods for server-side rendering, but all you need is a server-side compiler for Handlebars.

That way you can use the same Handlebars template on both the client and the server (isomorphic rendering).

Advantages: Faster initial rendering and improved SEO.

.NET/Razor recipe

1. Install Handlebars.Net

2. Create template.hbs with a Handlebars template

<div>{{response.count}} products</div>

3. Compile the template with some initial data

var handlebarsTemplate = File.ReadAllText("template.hbs");
var initialResponse = new { count = 100 }; // Should be identical to the response provided by your api
var renderedTemplateHtml = Handlebars.Compile(handlebarsTemplate)(new { response = initialResponse });

4. Render the template and the compiled output

<div data-filter class="filter">
    <script data-filter-template type="text/x-handlebars-template">
    <div data-filter-rendered-template>

5. Initialize the JavaScript

var element = document.querySelector('[data-filter]');
var options = {};
var filter = new window.Filter(element, options);