OpenGraph Ninja SDK

This library contains the code you need to generate nice-looking previews of stand-alone links. That's any code that looks like this:

<p>
  <a href="https://some.url">https://some.url</a>
</p>

Usage

This package contains two things:

• an automated script for previewing URLs
• some default styles for those previews

Setup

First, install the package.

$ npm install @opengraphninja/sdk
# or
$ yarn add @opengraphninja/sdk

Then, you need to import two things in your code - the SDK itself and the default styles (if you don't want to override them, that is):

import { initialize } from "@opengraphninja/sdk";
import "@opengraphninja/sdk/styles.css"; // remember the default styles

You can also include it as script tags and link tags if that works best:

<script defer src="https://unpkg.com/@opengraphninja/sdk/dist/opengraphninja.min.js"></script>
<link rel="stylesheet" href="https://unpkg.com/@opengraphninja/sdk/styles.css" />

In that case, you'll find the OpenGraphNinja namespace on your window object.

document.addEventListener("DOMContentLoaded", () => {
  window.OpenGraphNinja.initialize();
});

Using the automated script

Let's turn those regular links into cool previews!

import { initialize } from "@opengraphninja/sdk";

document.addEventListener("DOMContentLoaded", () => {
  initialize();
});

By default, this script will find all links that are the only child inside of a p tag inside of your <main /> section. Or in CSS-selector terms: main p > a:only-child. The script also ignores any links that has text in the same <p /> tag.

You can ignore a particular link or sub-section of your page by adding the data-ogn-ignore attribute to either the link or any ancestor.

Here are some examples to make things a bit more clear :

<main>
  <!-- Will be converted to preview -->
  <p><a href="https://some.url">https://some.url</a></p>

  <!-- Will be converted to preview -->
  <p><a href="https://some.url">Check this link</a></p>

  <!-- Will not be converted to preview -->
  <p>
    <strong><a href="https://some.url">https://some.url</a></strong>
  </p>

  <!-- Will not be converted to preview -->
  <p>
    <a href="https://some.url">https://some.url</a>
    <a href="https://some.url">https://some.url</a>
  </p>

  <!-- Will not be converted to preview -->
  <p>
    Check out this link!
    <a href="https://some.url">https://some.url</a>
  </p>

  <!-- Will not be converted to preview -->
  <div>
    <a href="https://some.url">https://some.url</a>
  </div>

  <!-- Will not be converted to preview -->
  <p><a href="https://some.url" data-ogn-ignore>https://some.url</a></p>

  <!-- Will not be converted to preview -->
  <div data-ogn-ignore>
    <p><a href="https://some.url">https://some.url</a></p>
  </div>
</main>

<!-- Will not be converted since outside of main tag -->
<p><a href="https://some.url">https://some.url</a></p>

Options

initialize takes an optional linkSelector if the default doesn't fit your markup:

initialize({ linkSelector: ".post p > a:only-child" });

Upgrading to 0.2.0

If you import the package by name, nothing changes. If you load it from a CDN or reach into dist directly, the bundles were renamed — the old ones were called opensourceninja.* because of a typo in the build config:

Before	Now
dist/opensourceninja.umd.production.min.js	dist/opengraphninja.min.js
dist/opensourceninja.esm.js	dist/opengraphninja.mjs
dist/opensourceninja.cjs.development.js	dist/opengraphninja.js
window.OpenSourceNinja	window.OpenGraphNinja

The CDN URLs above still work, since unpkg serves files directly. Importing from inside dist in your own code (@opengraphninja/sdk/dist/...) no longer resolves, though — the package now has an exports map. The PreviewData and Details types are exported from the package root instead.

React version

If you're using React, you can use @opengraphninja/react to create cool previews there as well.

Questions and feature requests?

If you have questions, bug reports or feature requests, please let us know in the issues.