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eleventy-plugin-metagen

An Eleventy shortcode that generates document metadata containing: Open Graph, Twitter card, generic meta tags, CSS, JS, custom tags, and a canonical link.

Installation

Install the plugin from npm:

npm install eleventy-plugin-metagen

Add it to your Eleventy Config file:

const metagen = require('eleventy-plugin-metagen');

module.exports = (eleventyConfig) => {
    eleventyConfig.addPlugin(metagen);
};

What does it do?

The plugin turns 11ty shortcodes like this:

{% metagen
  title="Eleventy Plugin Meta Generator",
  desc="An eleventy shortcode for generating meta tags.",
  url="https://tannerdolby.com",
  img="https://tannerdolby.com/images/arch-spiral-large.jpg",
  img_alt="Archimedean Spiral",
  twitter_card_type="summary_large_image",
  twitter_handle="tannerdolby",
  name="Tanner Dolby",
  generator="eleventy",
  comments=true,
  css=["style.css", "design.css"],
  js=["foo.js", ["bar.js", "async"]],
  inline_css="h1 { color: #f06; }",
  inline_js="console.log('hello, world.');"
%}

into <meta> tags and other document metadata like this:

<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Eleventy Plugin Meta Generator</title>
<meta name="author" content="Tanner Dolby">
<meta name="title" content="Eleventy Plugin Meta Generator">
<meta name="description" content="An eleventy shortcode for generating meta tags.">
<meta name="generator" content="eleventy">
<!-- Open Graph -->
<meta property="og:type" content="website">
<meta property="og:url" content="https://tannerdolby.com">
<meta property="og:locale" content="en_US">
<meta property="og:title" content="Eleventy Plugin Meta Generator">
<meta property="og:description" content="An eleventy shortcode for generating meta tags.">
<meta property="og:image" content="https://tannerdolby.com/images/arch-spiral-large.jpg">
<meta property="og:image:alt" content="Archimedean Spiral">
<!-- Twitter -->
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:site" content="@tannerdolby">
<meta name="twitter:creator" content="@tannerdolby">
<meta name="twitter:url" content="https://tannerdolby.com">
<meta name="twitter:title" content="Eleventy Plugin Meta Generator">
<meta name="twitter:description" content="An eleventy shortcode for generating meta tags.">
<meta name="twitter:image" content="https://tannerdolby.com/images/arch-spiral-large.jpg">
<meta name="twitter:image:alt" content="Archimedean Spiral">
<link rel="canonical" href="https://tannerdolby.com">
<link rel="stylesheet" href="style.css">
<link rel="stylesheet" href="design.css">
<style>h1 { color: #f06; }</style>
<script src="foo.js"></script>
<script src="bar.js" async></script>
<script>console.log('hello, world');</script>

Use Your Template Data

To make your metadata dynamic, you can use template data as arguments to the shortcode without quotes or braces. The following example is within a Nunjucks (.njk) file:

---
title: Some title
desc: Some description
metadata:
  title: Some other title
  desc: Some other description
url: https://tannerdolby.com
image: https://tannerdolby.com/images/arch-spiral-large.jpg
alt: Archimedean spiral
type: summary_large_image 
twitter: tannerdolby
name: Tanner Dolby
---
{% metagen
    title=title or metadata.title,
    desc=desc or metadata.desc,
    url=url + page.url,
    img=image,
    img_alt=alt,
    twitter_card_type=type,
    twitter_handle=twitter,
    name=name
%}

Shorthand syntax:

---
metadata:
  title: foo bar
  desc: some desc
  ...
---
{% metagen metadata %}

See the metagen docs for more details on plugin usage.

Contributing

If you notice an issue or there is metadata that you need generated which isn't supported, feel free to open an issue.

  1. Fork this repo
  2. Clone git clone git@github.com:tannerdolby/eleventy-plugin-metagen.git
  3. Install dependencies npm install
  4. Build npm run build
  5. Serve locally npm run dev

Meta Tag Reference