Add icon to web page on bottom right as indicator when in offline mode.
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// ==UserScript==
// @id offline-indicator@loucypher
// @name Offline Indicator
// @namespace https://github.com/LouCypher/userscripts
// @description Add icon to web page on bottom right as indicator when in offline mode.
// @version 2.1pre
// @author LouCypher
// @contributor Tango! Desktop Project (icon)
// @license WTFPL
// @CSS-license MIT License
// @SVG-license Public domain
// @icon https://raw.github.com/LouCypher/userscripts/master/offline-indicator/icon48.png
// @icon64URL https://raw.github.com/LouCypher/userscripts/master/offline-indicator/icon64.png
// @contributionURL http://loucypher.github.io/userscripts/donate.html?Offline+Indicator
// @resource CSS https://raw.github.com/LouCypher/userscripts/master/offline-indicator/offline-indicator.css
// @resource SVG https://raw.github.com/LouCypher/userscripts/master/offline-indicator/offline-indicator.svg
// @resource CHANGELOG https://raw.github.com/LouCypher/userscripts/master/offline-indicator/CHANGELOG.txt
// @resource LICENSE https://raw.github.com/LouCypher/userscripts/master/licenses/WTFPL/LICENSE.txt
// @include /^(https?|ftp|unmht):.*/
// @grant GM_addStyle
// @grant GM_getResourceURL
// @grant GM_getResourceText
// ==/UserScript==
/* This program is free software. It comes without any warranty, to
* the extent permitted by applicable law. You can redistribute it
* and/or modify it under the terms of the Do What The Fuck You Want
* To Public License, Version 2, as published by Sam Hocevar. See
* http://www.wtfpl.net/ for more details. */
const DIV_ID = "offline-indicator";
const DIV_CLASS = "browser-is-offline";
function $(aId) {
return document.getElementById(aId);
}
function toggleIndicator() {
$(DIV_ID).classList.toggle(DIV_CLASS);
}
// Run on HTML document only
if (document instanceof HTMLDocument) {
GM_addStyle(GM_getResourceText("CSS"));
// Append <div> to <html> element
var div = document.documentElement.appendChild(document.createElement("div"));
div.id = DIV_ID;
var img = div.appendChild(document.createElement("img"));
img.src = GM_getResourceURL("SVG");
if (typeof opera === "object")
img.src = img.src.replace(/^data:/, "data:image/svg+xml");
img.alt = img.title = "Working offline";
if (!navigator.onLine)
toggleIndicator();
window.addEventListener("offline", toggleIndicator);
window.addEventListener("online", toggleIndicator);
}