79 lines
2.1 KiB
JavaScript
79 lines
2.1 KiB
JavaScript
function getLocalStorage(key) {
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try {
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return localStorage.getItem(key);
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} catch (e) {
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}
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return null;
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}
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function setLocalStorage(key, value) {
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try {
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if (value !== "" && value !== null) {
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localStorage.setItem(key, value);
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} else {
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localStorage.removeItem(key);
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}
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return true;
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} catch (e) {}
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return false;
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}
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function clearLocalStorage(key) {
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localStorage.removeItem(key);
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}
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function jumpToBottom(id) {
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const div = id ? document.querySelector(id) : document.body;
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div.scrollTo({
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top: div.scrollHeight,
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left: 0,
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behavior: 'smooth'
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});
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}
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function uuidv4() {
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return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
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const r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
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return v.toString(16);
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});
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}
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function setVHvar() {
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var vh = window.innerHeight * 0.01;
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// Then we set the value in the --vh custom property to the root of the document
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document.documentElement.style.setProperty('--vh', `${vh}px`);
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console.log("== new vh", vh)
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}
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// delayed
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function mobileVHhack() {
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setTimeout(setVHvar, 100);
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}
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// Trying to determine if browser is mobile/tablet.
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// Source: https://developer.mozilla.org/en-US/docs/Web/HTTP/Browser_detection_using_the_user_agent
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function hasTouchScreen() {
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var hasTouchScreen = false;
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if ("maxTouchPoints" in navigator) {
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hasTouchScreen = navigator.maxTouchPoints > 0;
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} else if ("msMaxTouchPoints" in navigator) {
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hasTouchScreen = navigator.msMaxTouchPoints > 0;
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} else {
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var mQ = window.matchMedia && matchMedia("(pointer:coarse)");
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if (mQ && mQ.media === "(pointer:coarse)") {
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hasTouchScreen = !!mQ.matches;
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} else if ('orientation' in window) {
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hasTouchScreen = true; // deprecated, but good fallback
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} else {
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// Only as a last resort, fall back to user agent sniffing
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var UA = navigator.userAgent;
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hasTouchScreen = (
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/\b(BlackBerry|webOS|iPhone|IEMobile)\b/i.test(UA) ||
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/\b(Android|Windows Phone|iPad|iPod)\b/i.test(UA)
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);
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}
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}
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return hasTouchScreen;
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}
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