allaroundhere.org/js/custom.js

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JavaScript
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const BACKGROUND_IMAGES = [
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-allis.jpg",
description: "Allis Engine #4, Metropolitan Waterworks Museum",
source: ""
},
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-boston.jpg",
description: "Charles River Basin and Skyline",
source: ""
},
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-denver.jpg",
description: "Mile-High City Skyline",
source: ""
},
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-geese.jpg",
description: "Geese and Goslings on the banks of the Charles River",
source: ""
},
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-hotel.jpg",
description: "Bay Point Hotel, Lake Winnipesaukee",
source: ""
},
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-lawrencedam.jpg",
description: "Hydroelectric Dam on the St. Lawrence River",
source: ""
},
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-letchworth.jpg",
description: "The Middle Falls in Letchworth State Park",
source: ""
},
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-library.jpg",
description: "Robert W. Woodruff Library at Emory University",
source: ""
},
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-lighthouse.jpg",
description: "Nubble Lighthouse",
source: ""
},
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-mbta.jpg",
description: "Old vs New MBTA Green Line",
source: ""
},
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-rockyshore.jpg",
description: "Icy Stormy Shoreline at Brenton Point",
source: ""
},
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-rt112.jpg",
description: "Northern end of the Route 112 Scenic Byway",
source: ""
},
{
url: "https://cdn.enp.one/img/backgrounds/cl-photo-startrek.jpg",
description: "Enterprise Engineering Systems at the Star Trek Set Museum",
source: ""
}
];
function selectBackground() {
let max = BACKGROUND_IMAGES.length - 1
let min = 0;
index = Math.round(Math.random() * (max - min) + min);
console.log("Loading background #" + index + ": " + BACKGROUND_IMAGES[index].url);
return BACKGROUND_IMAGES[index];
}
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function togglePrimaryText() {
let items = document.getElementsByClassName("article");
for (index = 0; index < items.length; index++) {
if (items[index].classList.contains("primary-text")) {
items[index].classList.remove("primary-text");
} else {
items[index].classList.add("primary-text");
}
}
let button = document.getElementById("toggle-description");
if (button.classList.contains("active")) {
button.classList.remove("active");
} else {
button.classList.add("active");
}
};
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window.addEventListener("DOMContentLoaded", function () {
let selected = selectBackground()
document.getElementById(
"background-image"
).style.backgroundImage = "url(" + selected.url + ")";
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});
window.addEventListener("load", async function () {
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document.getElementById("toggle-description").addEventListener("click", togglePrimaryText);
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document.getElementById("preloader").classList.add("fadeout");
// I don't actually know how promises or async works
// ¯\_(ツ)_/¯
// https://stackoverflow.com/questions/951021/what-is-the-javascript-version-of-sleep
await new Promise(r => setTimeout(r, 250))
document.getElementById("preloader").style.display = "none";
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});