当我在 chrome 中打开 jsfiddle 网站时，我的互联网断开了，出现了下面的图片。这是 jsfiddle 的功能还是我机器上的某种恶意软件？最新的 IE 上也发生了同样的事情。
答案1
这是 jsfiddle 的一个功能吗？
这是我的机器上的某种恶意软件吗？
不，这不是恶意的。它看起来只是想搞笑。
一些人显示该消息JavaScript它是从 JSFiddle 网站加载的 - 大概是当它检测到您的互联网出现问题时。
content: "似乎您已离线，您可能需要等到网络恢复后再继续。
一旦您再次上线，此消息将自毁。",
http://jsfiddle.net/js/heyoffline.js?update19062015
// Generated by CoffeeScript 1.4.0
(function() {
var Heyoffline, addEvent, destroy, extend, setStyles,
__slice = [].slice,
__bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
extend = function() {
var ext, extensions, key, obj, value, _i, _len;
obj = arguments[0], extensions = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
for (_i = 0, _len = extensions.length; _i < _len; _i++) {
ext = extensions[_i];
for (key in ext) {
value = ext[key];
obj[key] = value;
}
}
return obj;
};
addEvent = function(element, event, fn, useCapture) {
if (useCapture == null) {
useCapture = false;
}
return element.addEventListener(event, fn, useCapture);
};
setStyles = function(element, styles) {
var key, value, _results;
_results = [];
for (key in styles) {
value = styles[key];
_results.push(element.style[key] = !isNaN(value) ? "" + value + "px" : value);
}
return _results;
};
destroy = function(element) {
return element.parentNode.removeChild(element);
};
Heyoffline = (function() {
Heyoffline.prototype.options = {
text: {
title: "You're currently offline",
content: "Seems like you've gone offline, you might want to wait until your network comes back before continuing.<br /><br /> This message will self-destruct once you're online again.",
button: "Relax, I know what I'm doing"
},
monitorFields: false,
prefix: 'heyoffline',
noStyles: false,
disableDismiss: false,
elements: ['input', 'select', 'textarea', '*[contenteditable]']
};
Heyoffline.prototype.modified = false;
function Heyoffline(options) {
this.hideMessage = __bind(this.hideMessage, this);
this.offline = __bind(this.offline, this);
this.online = __bind(this.online, this);
extend(this.options, options);
this.setup();
}
Heyoffline.prototype.setup = function() {
this.events = {
element: ['keyup', 'change'],
network: ['online', 'offline']
};
this.elements = {
fields: document.querySelectorAll(this.options.elements.join(',')),
overlay: document.createElement('div'),
modal: document.createElement('div'),
heading: document.createElement('h2'),
content: document.createElement('p'),
button: document.createElement('a')
};
this.defaultStyles = {
overlay: {
position: 'absolute',
top: 0,
left: 0,
width: '100%',
background: 'rgba(0, 0, 0, 0.3)'
},
modal: {
padding: 15,
background: '#fff',
boxShadow: '0 2px 30px rgba(0, 0, 0, 0.3)',
width: 450,
margin: '0 auto',
position: 'relative',
top: '30%',
color: '#444',
borderRadius: 2,
},
heading: {
fontSize: '1.7em',
paddingBottom: 15
},
content: {
paddingBottom: 15
},
button: {
fontWeight: 'bold',
cursor: 'pointer'
}
};
return this.attachEvents();
};
Heyoffline.prototype.createElements = function() {
this.createElement(document.body, 'overlay');
this.resizeOverlay();
this.createElement(this.elements.overlay, 'modal');
this.createElement(this.elements.modal, 'heading', this.options.text.title);
this.createElement(this.elements.modal, 'content', this.options.text.content);
if (!this.options.disableDismiss) {
this.createElement(this.elements.modal, 'button', this.options.text.button);
return addEvent(this.elements.button, 'click', this.hideMessage);
}
};
Heyoffline.prototype.createElement = function(context, element, text) {
this.elements[element].setAttribute('class', "" + this.options.prefix + "_" + element);
this.elements[element] = context.appendChild(this.elements[element]);
if (text) {
this.elements[element].innerHTML = text;
}
if (!this.options.noStyles) {
return setStyles(this.elements[element], this.defaultStyles[element]);
}
};
Heyoffline.prototype.resizeOverlay = function() {
return setStyles(this.elements.overlay, {
height: window.innerHeight
});
};
Heyoffline.prototype.destroyElements = function() {
if (this.elements.overlay) {
return destroy(this.elements.overlay);
}
};
Heyoffline.prototype.attachEvents = function() {
var event, field, _i, _j, _len, _len1, _ref, _ref1,
_this = this;
_ref = this.elements.fields;
for (_i = 0, _len = _ref.length; _i < _len; _i++) {
field = _ref[_i];
this.elementEvents(field);
}
_ref1 = this.events.network;
for (_j = 0, _len1 = _ref1.length; _j < _len1; _j++) {
event = _ref1[_j];
this.networkEvents(event);
}
return addEvent(window, 'resize', function() {
return _this.resizeOverlay();
});
};
Heyoffline.prototype.elementEvents = function(field) {
var event, _i, _len, _ref, _results,
_this = this;
_ref = this.events.element;
_results = [];
for (_i = 0, _len = _ref.length; _i < _len; _i++) {
event = _ref[_i];
_results.push((function(event) {
return addEvent(field, event, function() {
return _this.modified = true;
});
})(event));
}
return _results;
};
Heyoffline.prototype.networkEvents = function(event) {
return addEvent(window, event, this[event]);
};
Heyoffline.prototype.online = function() {
return this.hideMessage();
};
Heyoffline.prototype.offline = function() {
if (this.options.monitorFields) {
if (this.modified) {
return this.showMessage();
}
} else {
return this.showMessage();
}
};
Heyoffline.prototype.showMessage = function() {
this.createElements();
if (this.options.onOnline) {
return this.options.onOnline.call(this);
}
};
Heyoffline.prototype.hideMessage = function(event) {
if (event) {
event.preventDefault();
}
this.destroyElements();
if (this.options.onOffline) {
return this.options.onOffline.call(this);
}
};
return Heyoffline;
})();
addEvent(window, 'load', function() {
return window.Heyoffline = new Heyoffline;
});
}).call(this);