Drupal 8 Views style plugin to create a vertical timeline display.
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README.md

Vertical Timeline for Drupal 8

The inspiration for this timeline is at: http://www.websterhall.com/timeline/. The final solution borrows ideas from lots of sources to create a responsive, infinitely scrolling, vertical timeline that takes up two columns on large screens and collapses down to a single column on small screens. It uses MasonryJS rather than a standard grid layout to keep the source order right but fill in the gaps in the two column timeline when the content is irregularly sized. Most effects are pure css, like the zoom effect when you hover over a timeline item.

See a demo of the work in progress at http://www.karen-stevenson.com/test-timeline.

Required

To try this out

Alternate Composer installation

Add the following to your composer.json file:

    "require": {
        "robloach/component-installer": "*"
    },
    "config": {
        "component-dir": "libraries",
        "component-baseurl": "/libraries"
    },
    "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/karens/vertical_timeline.git"
        }
    ]

Then run composer require karens/vertical_timeline

This will download this module and its dependencies, and move any required javascript libraries (components) to a /libraries folder in your installation.

If you type composer require karens/vertical_timeline --prefer-dist, you'll get a tarball of this module, if you type composer require karens/vertical_timeline --prefer-source, you'll get a git checkout.

Credits

The original inspiration: http://www.websterhall.com/timeline/

A starting point for a basic, responsive, two column vertical timeline: http://codepen.io/codyhouse/full/FdkEf

Adding MasonryJS to fill in irregularly sized items in the two column layout: http://masonry.desandro.com/

Adding dynamic classes that correspond to their current masonry position, so css can target left and right items differently: http://www.9lessons.info/2012/01/facebook-timeline-design-using-jquery.html

Borrowing ideas from D7 for custom queries, paging and infinite scrolling: http://thinkshout.com/blog/2014/06/creating-an-infinite-scroll-masonry-block-without-views/

Creating CSS-only callouts and circles: https://css-tricks.com/snippets/css/css-triangle/

CSS-only modal window effect on hover: https://css-tricks.com/snippets/css/scale-on-hover-with-webkit-transition/ https://css-tricks.com/almanac/properties/t/transition-delay/