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index.ts
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index.ts
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import { offsetPercent, pageData, totalPages } from "./data";
// state of the webapp
let currentPage: number = 0,
img: HTMLElement,
companyInfo: HTMLElement,
stepper: HTMLElement,
splashScreen: HTMLElement,
homePage: HTMLElement,
pageInfo: HTMLElement,
pager: HTMLElement;
// Slower network management
document.addEventListener("DOMContentLoaded", () => {
const monk = document.querySelector(".monk");
const text1 = document.querySelector(".monk-text-1");
const text2 = document.querySelector(".monk-text-2");
const loader = document.querySelector(".loader");
monk.addEventListener("load", () => {
loader.remove();
monk.classList.add("appear");
text1.classList.add("appear");
text2.classList.add("appear");
onPageMount();
});
});
// On inital load of the page
function onPageMount() {
img = document.getElementById("mainImg");
companyInfo = document.getElementById("companyInfo");
stepper = document.getElementById("stepper");
splashScreen = document.querySelector(".home-splash");
homePage = document.querySelector("#homePage");
pageInfo = document.querySelector("#pageInfo");
pager = document.querySelector("#pager");
let fragment: DocumentFragment = document.createDocumentFragment();
for (let i = 1; i <= totalPages; i++) {
const div: HTMLElement = document.createElement("div");
div.classList.add("page-info");
div.classList.add("info-" + i);
if (pageData[i - 1][1] === "right") {
div.classList.add("right");
}
div.innerHTML = pageData[i - 1][0];
fragment.appendChild(div);
}
pageInfo.appendChild(fragment);
for (let i = 0; i <= totalPages + 1; i++) {
const div: HTMLElement = document.createElement("div");
const innerDiv: HTMLElement = document.createElement("div");
if (i === 0) {
innerDiv.classList.add("selected");
}
innerDiv.dataset.type = "page";
innerDiv.id = "page" + i;
innerDiv.textContent = i < 1 || i > totalPages ? "" : String(i);
div.appendChild(innerDiv);
fragment.appendChild(div);
}
pager.appendChild(fragment);
setTimeout(() => {
splashScreen.classList.add("hide");
homePage.classList.remove("hide");
}, 6500);
companyInfo.style.width = (2 * window.innerWidth) / 3 + "px";
companyInfo.style.transform = `translateX(${(2 * window.innerWidth) / 3}px)`;
homePage.addEventListener("click", onClickHandler);
companyInfo.style.width = (2 * window.innerWidth) / 3 + "px";
companyInfo.style.transform = `translateX(${(2 * window.innerWidth) / 3}px)`;
homePage.addEventListener("click", onClickHandler);
}
function onClickHandler(event: any): void {
if (event.target.getAttribute("data-type") === "page") {
if (updateStepper(+event.target.id.split("page")[1])) {
currentPage = +event.target.id.split("page")[1];
setPageNumberToHolder(currentPage);
displayPageMark(currentPage);
}
} else if (event.target.id === "arrowLeft") {
if (updateStepper(currentPage - 1)) {
currentPage = currentPage - 1;
setPageNumberToHolder(currentPage);
displayPageMark(currentPage);
}
} else if (event.target.id === "arrowRight") {
if (updateStepper(currentPage + 1)) {
currentPage = currentPage + 1;
setPageNumberToHolder(currentPage);
displayPageMark(currentPage);
}
}
}
function setPageNumberToHolder(pageNo: number): void {
document.getElementById("bgImgHolder").dataset.page = String(pageNo);
}
function updateStepper(pageNo: number): boolean {
if (pageNo === 0) {
stepper.style.display = "none";
companyInfo.style.transform = `translateX(${(2 * window.innerWidth) / 3}px)`;
img.style.transform = `translateX(0px)`;
return true;
} else if (pageNo === 9) {
stepper.style.display = "none";
img.style.transform = `translateX(${getLastPageOffset() - (2 * window.innerWidth) / 3}px)`;
companyInfo.style.transform = "translateX(0px)";
return true;
} else if (pageNo === 7 || pageNo === 8) {
stepper.textContent = `Step ${pageNo} out of 8 on the path of enlightenment`;
companyInfo.style.transform = `translateX(${(2 * window.innerWidth) / 3}px)`;
img.style.transform = `translateX(${getLastPageOffset()}px)`;
stepper.style.display = "block";
return true;
} else if (pageNo > 0 && pageNo < 9) {
stepper.textContent = `Step ${pageNo} out of 8 on the path of enlightenment`;
companyInfo.style.transform = `translateX(${(2 * window.innerWidth) / 3}px)`;
img.style.transform = `translateX(${offsetPercent[pageNo]})`;
stepper.style.display = "block";
return true;
} else {
return false;
}
}
function getLastPageOffset(): number {
return window.innerWidth - img.clientWidth;
}
function displayPageMark(pageNo: number): void {
document.querySelector(".selected")?.classList.remove("selected");
document.getElementById("page" + pageNo).classList.add("selected");
}