davidhund

/**
 * = Visually Hide text
 *
 * Text remains accessible to AT such as Screen Readers
 * Updated version: 
 * Taken from http://hugogiraudel.com/2016/10/13/css-hide-and-seek/
 *
 * ------------------------------------------------------------------------- */
.visually-hidden {
  border: 0 !important;

peeke

/**
 * Used for inter-object communication.
 * (Semi-)drop in replacement for Rik Schennink's Observer.
 *
 * Implementation differences:
 * - ES6
 * - The use of WeakMaps
 * - inform() and conceal() don't return a boolean indicating success.
 * - Subscription fn's are called with seperate arguments, instead of one data parameter. This is backwards compatible.
 *

Heydon

// Elements with `data-observe` toggle `data-visible`
// between `true` and `false`

if ('IntersectionObserver' in window) {
  const callback = (entries, observer) => {
    entries.forEach(entry => {
      entry.target.setAttribute('data-visible', entry.isIntersecting)
    })
  }