78 lines
1.9 KiB
JavaScript
78 lines
1.9 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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// jump down to the max height of a div, with a slight delay
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function jumpToBottom(element) {
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if (!element) return;
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setTimeout(() => {
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element.scrollTo({
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top: element.scrollHeight,
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left: 0,
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behavior: 'smooth'
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});
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}, 50, element);
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}
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// convert newlines to <br>s
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function addNewlines(str) {
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return str.replace(/(?:\r\n|\r|\n)/g, '<br />');
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}
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function pluralize(string, count) {
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if (count === 1) {
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return string;
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} else {
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return string + "s";
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}
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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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