| 1 |
(function () { |
| 2 |
'use strict'; |
| 3 |
|
| 4 |
document.querySelectorAll('.bkbg-hiw-wrapper').forEach(function (wrap) { |
| 5 |
var steps = wrap.querySelectorAll('.bkbg-hiw-anim'); |
| 6 |
if (!steps.length) return; |
| 7 |
|
| 8 |
var observer = new IntersectionObserver(function (entries) { |
| 9 |
entries.forEach(function (entry) { |
| 10 |
if (entry.isIntersecting) { |
| 11 |
var el = entry.target; |
| 12 |
var delay = parseFloat(el.getAttribute('data-delay') || 0); |
| 13 |
setTimeout(function () { |
| 14 |
el.classList.add('bkbg-hiw-visible'); |
| 15 |
}, delay); |
| 16 |
observer.unobserve(el); |
| 17 |
} |
| 18 |
}); |
| 19 |
}, { threshold: 0.15 }); |
| 20 |
|
| 21 |
steps.forEach(function (step, i) { |
| 22 |
step.setAttribute('data-delay', i * 120); |
| 23 |
observer.observe(step); |
| 24 |
}); |
| 25 |
}); |
| 26 |
})(); |
| 27 |
|
