Inker - a workflow for keeping sane email templates

Basics

Inker one of the best way to build email templates, take back control over your html, never have again this big mess of tables you can't understand.

Documentation http://posabsolute.github.io/inker/

Inker is:

• Built on top of Zurb Ink
• Sane CSS components structure with sass
• Sane HTML components structure with nunjuck
• Auto generate template to HTML documents with inlined CSS
• Auto deployment on litmus for testing

Getting started

Inker require npm & grunt to be already installed.

git clone https://github.com/posabsolute/inker.git
cd inker && npm install

You have now everything you need to use inker. Your first stop would be the example in src/templates to help you get started.

Available grunt commands

• grunt watch - Watch source folder for changes & generate dist files
• grunt css - Build CSS
• grunt html - Build HTML templates
• grunt build - Build css & html
• grunt connect *- test emails in your browser from the root folder (http://0.0.0.0:8555/)
• grunt email - Send a test email to any email inbox
• grunt litmus - Send a test email to litmus

CSS with Inker

Inker use Zurb Ink responsive css framework, everything in Ink is available in inker, please refer to their documentation. Inker also use the meta framework ITCSS for the files & folders structure. Better explained by this image. The css can be found in src/css

base.scss is your base CSS file importing all needed files for inker, if you add a css component you must import it in base.scss.

It is important to note that since we inline style to html nodes it make no sense to pick & choose components you want to use as it will make no difference on the file size in the end

Responsive

Responsive rules are in the folder 8_trumps, please note that these rules are added to the document head instead of inlined using data-ignore="ignore" in the html templates.

Ignore css inlining

<!-- external styles -->
<link rel="stylesheet" data-ignore="ignore"  href="../css/style.css" />

<!-- embedded styles -->
<style data-ignore="ignore">
 /* styles here will not be inlined */
</style>

Adding new themes

Open 7_themes, you will see there is already a folder called sidebarhero used for the sidebar hero template. Add a new folder in 7_themes for your template, your main css file will be automatically generated in dist/css/[your folder].

Them in your html use:

  {% block theme_css %}<link href="../../css/sidebarhero/sidebarhero.css" media="all" rel="stylesheet" type="text/css" />{% endblock %}

HTML with inker

Inker use Mozilla Nunjucks to build html templates, please see nunjucks documentation for more information on how you can take inker even farther.

Inker as an html components stucture that use nunjucks macros. Example of component:

{% macro button(label='default', link='#', class='', align='left') %}
  <table class="button {{class}}" align="{{align}}">
    <tr>
      <td>
        <a href="{{link}}">{{label}}</a>
      </td>
    </tr>
  </table>
{% endmacro %}

// Import the component in the base.html file in html-components folder.
{% from "/html-components/component.button.html" import button %}

Usage in html template:

{{ button('Go to google', 'http://www.google.com', 'button-green', 'left'); }}

When creating new components remember to add them to the base.html file situates in src/html-components

Creating new html templates

Open the templates folder, you should see a folder sidebar_hero, add your own folder here. Please refer to sidebar_hero for a complete example.

Example of base template

{% extends "/html-components/base.html" %}
  {% block main_css %}<link href="../../css/main.css" media="all" rel="stylesheet" type="text/css" />{% endblock %}
  {% block theme_css %}<link href="../../css/sidebarhero/sidebarhero.css" media="all" rel="stylesheet" type="text/css" />{% endblock %}

  {% block responsive_css %}<link href="../../css/responsive.css" media="all" data-ignore="ignore" rel="stylesheet" type="text/css" />{% endblock %}
  
  {% block meta_title %}Email title in document head{% endblock %}

{% block mainContent %}

  {% block header %} {% include "/templates/sidebar_hero/header.html" %} {% endblock %}
  {% block content %} {% include "/templates/sidebar_hero/content.html" %} {% endblock %}

{% endblock %}

Inker with your back-end templating engine & application

Inker is specially thought so it integrate with your back-end application, Inker templating engine use <# #> so it does not interfere with others templating engine making it possible to test your templates with inker & then use your back-end to place data & send your email.

Inker with dynamic custom data

Inker can use json files as a source of dynamic data, example wout want to test a product loop.

This is a built-in feature of grunt-nunjucks-2-html.

nunjucks: {
  options: {
    data: grunt.file.readJSON('data.json')
  }
}

Included components

Current list of implemented component. (I am always looking to add more components to inker.)

Buttons

Options:

• Label
• Link
• Class to add
• Alignement

Usage:

button('Go to google', 'http://www.google.com', 'button-green', 'left');

Render:

  <table class="button button-green" align="left">
    <tr>
      <td>
        <a href="http://www.google.com">Go to google</a>
      </td>
    </tr>
  </table>

Progress Bar

Options:

• width of bars
• progress
• label
• Class to add

Usage:

progressbar('100%', 70, 'Your progress so far', 'progressbar-green');

Render:

  <table class='progressbar progressbar-green' cellpadding="0" cellspacing="0" width="100%">
      <tr>
          <td class='foreground' style='' width="70%">
              Your progress so far
          </td>
          <td class="background" width="30%">
              &nbsp;
          </td>
      </tr>
  </table>

Video

Please refer to campaign monitor chart to see what email client support video, fall back to an image.

Options:

• width
• height
• video_src
• video_link
• video_image_placeholder
• class

Usage:

video(320, 176, 'http://www.google.com', 'http://www.google.com', 'http://www.google.com', 'video-big');

Render:

  <div class="video_holder video-big">
      <video width="320" height="176" controls>
          <source src="{{video_src}}.mp4" type="video/mp4">
          <source src="{{video_src}}.ogg" type="video/ogg">
            <a href="{{video_link}}" ><img height="176" 
              src="{{video_image_placeholder}}" width="320" /></a>
      </video>
  </div>

Image Caption

Options:

• Label
• Width
• Class
• Align

Usage:

caption('This is a cat', '320px', 'caption-red', 'left');

Render:

  <table class="caption caption-red" cellpadding="0" cellspacing="0" width="320px" border="0", align='left'>
      <tr>
          <td align="center">
              <img src="http://placekitten.com/g/300/300" alt="" />
              <div>This is a cat</div>
          </td>
      </tr>
  </table>

Panel

Options:

• Label
• size (default: twelve)
• Class

Usage:

panel('This is a panel', 'twelve', 'panel-red');

Render:

  <table class="twelve panel-red columns">
    <tr>
      <td class="panel">

        This is a panel

      </td>
      <td class="expander"></td>
    </tr>
  </table>

Sending a test email to your inbox

Inker use grunt-nodemailer to send test. By default it send a test for all files that are in the output folders, you can easily change that in gruntfile.js.

However a better way to use it would be to change the path directly from the grunt command. This make it possible to send tests really fast with different templates.

// Override default src provided in gruntfile
grunt email --fileSrc=dist/output/example.html

Config example:

nodemailer: {
    options: {
      transport: {
        type: 'SMTP',
        options: {
          service: 'Gmail',
          auth: {
            user: '[email protected]',
            pass: 'BLAH'
          }
        }
      },
      recipients: [
        {
          email: '[email protected]',
          name: 'Jane Doe'
        }
      ]
    },
    src: ['dist/output/*.html']
},

Using litmus

Grunt litmus documentation.

Overriding default files sent to litmus

grunt litmus:dist/output/sidebar_hero/index.html

Default config

The most used email clients are already set in the config file.

litmus: {
  test: {
    src: ['email.html'],
    options: {
      username: 'username',
      password: 'password',
      url: 'https://yourcompany.litmus.com',
      clients: [
        //gmail
        'gmailnew', 'ffgmailnew', 'chromegmailnew',
        // outlook
        'ol2002', 'ol2003', 'ol2007', 'ol2010', 'ol2011', 'ol2013',
        // hotmail
        'outlookcom', 'ffoutlookcom', 'chromeoutlookcom', 
        //Yahoo
        'chromeyahoo',
        //applemail
        'appmail6',
        //mobile
        'iphone6plus', 'iphone6', 'iphone5s', 'androidgmailapp', 'android4', 'ipad',
        // spam check
        'messagelabs'
      ]
    }
  }
},

Special thanks

Thanks to Litmus for providing free email client testing for this project.

Contributions

I'm always happy to accept contributions, i'm currently looking for more components & example, but please follow ITCSS guidelines & please test your new components in the most used email clients.

Licence

The MIT License (MIT)

Copyright (c) 2014 Cedric Dugas http://www.position-absolute.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.