eleventy-cache-webmentions v1.1.2

Quick Guide permalink¶

I wrote a quicker and simpler guide to getting this Eleventy plugin working that cuts out all the fluff and extra details. You can read about it here: Webmention Setup for Eleventy.

Installation permalink¶

Available on npm:

npm install @chrisburnell/eleventy-cache-webmentions --save-dev

You can also download it directly from GitHub: https://github.com/chrisburnell/eleventy-cache-webmentions/archive/main.zip

Once installed there are two more required set-up steps:

Add it to your config

Inside your Eleventy config file (typically .eleventy.js), use addPlugin:

const pluginWebmentions = require("@chrisburnell/eleventy-cache-webmentions")

module.exports = function(eleventyConfig) {
    eleventyConfig.addPlugin(pluginWebmentions, {
        // these 3 fields are all required!
        domain: "https://example.com",
        feed: "https://webmentions.example.com?token=S3cr3tT0k3n",
        key: "children"
    })
}

Options permalink¶

Advanced control over how the Webmentions are cached and processed is done by passing options into the plugin when using addPlugin:

const pluginWebmentions = require("@chrisburnell/eleventy-cache-webmentions")

module.exports = function(eleventyConfig) {
    eleventyConfig.addPlugin(pluginWebmentions, {
        // domain: required or the plugin will not function
        //   this is the website that you want to pull in Webmentions for
        domain: "https://example.com",
        // feed: required or the plugin will not function
        //   defines the URL of your Webmention server where a feed of Webmentions for your domain can be found
        feed: "https://webmentions.example.com?token=S3cr3tT0k3n",
        // key: required or the plugin will not function
        //   dictates the key inside the feed where the array of Webmentions is located
        key: "children",
        // directory: ".cache" by default
        //   see https://www.11ty.dev/docs/plugins/cache/#cache-directory for more info
        directory: ".cache",
        // duration: "1d" by default
        //   see https://www.11ty.dev/docs/plugins/cache/#change-the-cache-duration for more info
        duration: "1d",
        // uniquekey: "webmentions" by default
        //   dictates the name sent to eleventy-fetch to name the file
        uniqueKey: "webmentions",
        // allowedHTML: Object by default
        //   see https://www.npmjs.com/package/sanitize-html for more info
        allowedHTML: {
            allowedTags: ["b", "i", "em", "strong", "a"],
            allowedAttributes: {
                a: ["href"],
            },
        },
        // allowlist: [] by default
        //   array of root URLs from which webmentions are wanted exclusively
        allowlist: [],
        // blocklist: [] by default
        //   array of root URLs from which webmentions are not wanted
        //   exclusively
        blocklist: [],
        // urlReplacements: {} by default
        //   object of key:value pairs containing from:to URL replacements
        urlReplacements: {},
        // maximumHtmlLength: 2000 by default
        //   number of characters in the HTML content at which a different
        //   message is shown instead of the content
        maximumHtmlLength: 2000,
        // maximumHtmlText: "mentioned this in" by default
        //   message shown when maximumHtmlLength is reached
        maximumHtmlText: "mentioned this in",
    })
}

JavaScript Usage permalink¶

Accessing the plugin in JavaScript in the way shown below will give you an Object containing your cached Webmentions organised in key:value pairs where the key is a URL on your domain and the value is an array of data for Webmentions sent to that URL.

const Webmentions = require("@chrisburnell/eleventy-cache-webmentions")(null, {
    domain: "https://example.com",
    feed: "https://webmentions.example.com?token=S3cr3tT0k3n",
    key: "children"
})

const webmentionsByUrl = await Webmentions()

This can prove to be very useful when building out your pages. Using Eleventy’s Data Cascade, we can attach Webmentions to each page by using Directory Specific Data Files:

const Webmentions = require("@chrisburnell/eleventy-cache-webmentions")(null, {
    domain: "https://example.com",
    feed: "https://webmentions.example.com?token=S3cr3tT0k3n",
    key: "children"
})

module.exports = async () => {
    const webmentionsByUrl = await Webmentions()

    return {
        eleventyComputed: {
            webmentions: (data) => {
                const webmentionsForUrl = webmentionsByUrl["https://example.com" + data.page.url] || []

                if (webmentionsForUrl.length) {
                    return webmentionsForUrl.sort((a, b) => {
                        return (b.data.published || b.verified_date) - (a.data.published || a.verified_date)
                    })
                }
                return []
            },
        },
    }
}

You can now use this data in a number of useful ways, not limited to things like creating a collection of pages ordered by number of Webmentions:

module.exports = (eleventyConfig) => {
    eleventyConfig.addCollection("popular", (collection) => {
        return collection
            .sort((a, b) => {
                return b.data.webmentions.length - a.data.webmentions.length
            })
    })
}

Liquid/Nunjucks Usage permalink¶

Accessing the plugin in Liquid/Nunjucks by using a Filter and passing in a URL in the way shown below will give you an Array containing the cached Webmentions for the given URL.

{% set responses = webmentions %}

OR

{% set responses = page.url | getWebmentions %}

You can get back only specific response post types by passing a second argument:

{% set reactions = page.url | getWebmentions(['like-of', 'repost-of', 'bookmark-of']) %}
{% set replies = page.url | getWebmentions(['mention-of', 'in-reply-to']) %}

And, if you need it, the entire Object of sorted Webmentions is available too:

{% set count = 0 %}
{% for url, array in webmentions %}
    {% set count = array.length + count %}
{% endfor %}
<p>This site has received {{ count }} Webmentions!</p>

Webmention.io permalink¶

Webmention.io is a in-place Webmention receiver solution that you can use by authenticating yourself via IndieAuth (or host it yourself), and, like so much other publically-available IndieWeb software, is built and hosted by Aaron Parecki.

Add your token

Get set up on Webmention.io and add your API Key (found on your settings page) to your project as an environment variable, i.e. in a .env file in the root of your project:

WEBMENTION_IO_TOKEN=njJql0lKXnotreal4x3Wmd

Set your feed and key config options

const pluginWebmentions = require("@chrisburnell/eleventy-cache-webmentions")

module.exports = function(eleventyConfig) {
    eleventyConfig.addPlugin(pluginWebmentions, {
        domain: "https://example.com",
        feed: `https://webmention.io/api/mentions.jf2?domain=example.com&per-page=9001&token=${process.env.WEBMENTION_IO_TOKEN}`,
        key: "children"
    })
}

go-jamming permalink¶

go-jamming is a self-hosted Webmention sender and receiver, built in Go by Wouter Groeneveld and available with more information on his personal git instance.

Add your token

Once you’ve set up your go-jamming server and you’ve defined your token, you’ll need add it to your project as an environment variable, i.e. in a .env file in the root of your project:

GO_JAMMING_TOKEN=njJql0lKXnotreal4x3Wmd

Set your feed and key config options

const pluginWebmentions = require("@chrisburnell/eleventy-cache-webmentions")

module.exports = function(eleventyConfig) {
    eleventyConfig.addPlugin(pluginWebmentions, {
        domain: "https://example.com",
        feed: `https://jam.example.com/webmention/example.com/${process.env.GO_JAMMING_TOKEN}`,
        key: "json"
    })
}