Canonical Latest News

This project contains the JavaScript to display the latest blog posts of a given topic.

Usage

Use a node package manager to install this component and then link the JS file beneath the template, with settings.

1. Install via yarn or npm

yarn add @canonical/latest-news

...or...

npm install @canonical/latest-news --save

2. You can then install the library either by directly linking to it or via ES6 imports.

To consume the library directly, add a link to the JS file containing an IIFE and run the `canonicalLatestNews.fetchLatestNews() function:

<script src="/node_modules/@canonical/latest-news/dist/iife.js"></script>
<script>
  canonicalLatestNews.fetchLatestNews({
    /* options */
  });
</script>

To import it, simply call it from your site-wide JS file:

import { fetchLatestNews } from "@canonical/latest-news";
fetchLatestNews({
  /* options */
});

Templates

You will need a template that follows this structure to display the latest news feed:

<div id="latest-news-container">
  Loading...
</div>

<template style="display:none" id="articles-template">
  <div class="article-image"></div>
  <h4><a class="article-link article-title"></a></h4>
  <p>
    <em><time datetime="" class="article-time"></time></em>
  </p>
  <p class="article-author"></p>
</template>

The script will look for the following class names to use as hooks for content within the template:

• article-time: The time the article was published formatted as 2 May 2020
• article-link: The permalink for the article
• article-title: The title of the article
• article-image: The featured image of the article
• article-excerpt: The excerpt of the article
• article-group: The group of the article
• article-author: The author(s) of the article

You can choose what content to display and how it will look by using the above classes. If you don't want a certain part of the content, for example the article image, then do not include an element with the class name of article-image.

Blog Pattern

You can also render blog posts fetched by this module using Jinja pattern called Blog. More information about the pattern and its usage can be found in the Vanilla documentation.

Options

You will need to pass some options to the script in order for it to know where the template is and where it should be rendered to. These are:

• articlesContainerSelector: String - The container where the articles will be displayed
• articleTemplateSelector: String - The template that will be used for the article
• groupId: Integer - Return posts in a specific group (Optional)
• gtmEventLabel: String - An event label used for Google Analytics (Optional)
• hostname: String - An optional hostname to be used for the permalink. By default the link is relative (Optional)
• imageClasses: Array - A list of classes that will be added to the image element (Optional)
• limit: Integer - The number of posts to be returned (Optional)
• linkImage: Boolean - Wrap the thumbnail image in a link (Optional)
• spotlightContainerSelector: String - The container where the spotlight article will be displayed (Optional)
• spotlightTemplateSelector: String - The template that will be used for the spotlight article (Optional)
• tagId: Integer - Return posts with a specific tag (Optional)
• tagIds: String(comma separated tagids i.e. "id1,id2,id3") - Return posts with all tags (Optional)
• excerptLength: Integer - Specifies the approximate number of characters included in the excerpt (Optional)
• lazyLoadImage: Boolean - Enable lazy loading for images to improve page performance by loading images only when they enter the viewport. By default, it is true (Optional)
• url: String - By default API URL is /blog/latest-news, but in case it should be something else you can pass this optional parameter (Optional)

Building

To build the JS into the /dist folder, run:

yarn build

Watching the changed files

yarn watch

Run the tests

yarn test

Release process

The package is versioned using semantic versioning and published to the NPM registry.

To cut a new release run:

npm version [patch|minor|major]

This will trigger the prepublishonly script which will ensure requisite artefacts are built before publishing.

Code licensed LGPLv3 by Canonical Ltd.

With ♥ from Canonical