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script.js
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script.js
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+(function() {
const byId = document.getElementById.bind(document);
const anchor = byId("link");
const refreshBtn = byId("refresh");
const showAllBtn = byId("show-all");
const allLinks = byId("all-links");
function refreshLink(links, event) {
if (event) event.preventDefault();
const { idx, linkObj } = getNewLink(links);
if (idx > -1) {
links.splice(idx, 1);
if (links.length === 0) {
refreshBtn.style.display = "none";
showAllBtn.style.display = "inline-block";
}
anchor.innerHTML = linkObj.title;
anchor.setAttribute("href", linkObj.link);
}
}
function getNewLink(links) {
const idx = getRandomIdx(links.length);
return {
idx,
linkObj: links[idx]
};
}
function getRandomIdx(limit) {
return Math.floor(Math.random() * limit);
}
function showAllLinks(event) {
allLinks.style.display = "block";
}
function getListItem(linkObj) {
return `<li><a href="${linkObj.link}" target="_blank">${linkObj.title}</a></li>`;
}
function init() {
let links = window.link.allLinks || [];
refreshBtn.onclick = refreshLink.bind(null, links);
showAllBtn.onclick = showAllLinks.bind(null);
allLinks.innerHTML = links.map(getListItem).join("");
refreshLink(links);
}
init();
})();