| Unknown | d2db0f1 | 2019-01-10 14:22:00 -0500 | [diff] [blame] | 1 | /** |
| 2 | * animate-in.js 1.0.0 |
| 3 | * Animate elements on entrance |
| 4 | * |
| 5 | * Usage: |
| 6 | * |
| 7 | * Make sure to add this to the <head> of your page to avoid flickering on load |
| 8 | * Based on https://andycaygill.github.io/scroll-entrance/ |
| 9 | */ |
| 10 | (function() { |
| 11 | |
| 12 | //Set up defaults |
| 13 | var duration = "1000"; |
| 14 | var heightOffset = 100; |
| 15 | |
| 16 | |
| 17 | // document.write("<style id='temp-animate-in'>*[class^='animate-in'], *[class*=' animate-in'] {display:none}</style>") |
| 18 | |
| 19 | function isElementVisible(elem) { |
| 20 | |
| 21 | var rect = elem.getBoundingClientRect(); |
| 22 | |
| 23 | //Return true if any of the following conditions are met: |
| 24 | return ( |
| 25 | // The top is in view: the top is more than 0 and less than the window height (the top of the element is in view) |
| 26 | ( (rect.top + heightOffset) >= 0 && (rect.top + heightOffset) <= window.innerHeight ) || |
| 27 | // The bottom is in view: bottom position is greater than 0 and greater than the window height |
| 28 | ( (rect.bottom + heightOffset) >= 0 && (rect.bottom + heightOffset) <= window.innerHeight ) || |
| 29 | // The top is above the viewport and the bottom is below the viewport |
| 30 | ( (rect.top + heightOffset) < 0 && (rect.bottom + heightOffset) > window.innerHeight ) |
| 31 | ) |
| 32 | |
| 33 | } |
| 34 | |
| 35 | |
| 36 | function update() { |
| 37 | var nodes = document.querySelectorAll("*:not(.animate-in-done)[class^='animate-in'], *:not(.animate-in-done)[class*=' animate-in']") |
| 38 | |
| 39 | for (var i = 0; i < nodes.length; i++) { |
| 40 | if (isElementVisible(nodes[i])) { |
| 41 | nodes[i].classList.remove("out-of-viewport") |
| 42 | nodes[i].classList.add("animate-in-done") |
| 43 | } else { |
| 44 | nodes[i].classList.add("out-of-viewport") |
| 45 | } |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | document.addEventListener("DOMContentLoaded", function(event) { |
| 50 | update() |
| 51 | // setTimeout(function() { |
| 52 | // document.querySelector("#temp-animate-in").remove() |
| 53 | // }) |
| 54 | }); |
| 55 | |
| 56 | window.addEventListener("scroll", function() { |
| 57 | update() |
| 58 | }) |
| 59 | |
| 60 | })(); |
| 61 | |