javascript-events

问题 i am writing a simple infinite counter in javascript when the page loads it starts counting i would like to stop the counter when the mouse pointer is outside of the viewport please help? var i=0; setInterval(function (){ i++; document.getElementById("counterLoop").innerHTML=i; },1000); var viewportWidth = document.documentElement.clientWidth; var viewportHeight = document.documentElement.clientHeight; function getCursorXY(e) { CurX = (window.Event) ? e.pageX : event.clientX + (document

问题 I am having trouble with firing up same event on all DIVs which have class "card" as shown in below screenshot: <div class="row"> <div class="col-md-1"> <div class="margin"></div> <div class="card"> <div class="front">CardClick</div> <div class="back">1</div> </div> </div> <div class="col-md-1"> <div class="margin"></div> <div class="card"> <div class="front">CardClick</div> <div class="back">2</div> </div> </div> <div class="col-md-1"> <div class="margin"></div> <div class="card"> <div class

问题 Fullcalendar.js get events of the day on click Is it possible to get all events of the day I click on in the monthview and print them in any div element with Fullcalendar.js ? Here's my JSFiddle: http://jsfiddle.net/alexchizhov/syf9ycbc/4/ 回答1: You can always iterate over all events and find out which event is on selected day. Here is my function to do that: function getEvents(date){ all_events.forEach(function(entry) { if (entry['start'] == date.format()){ alert(entry['title']);} else if

问题 i am using JS-API to generate a dialogue which asks for permission to publish the status message generated by my Application. given below is the screenshot of what i am talking about: here is the code: FB.ui( { method: 'feed', name: 'Facebook Dialogs', link: 'http://developers.facebook.com/docs/reference/dialogs/', picture: 'http://fbrell.com/f8.jpg', caption: 'Reference Documentation', description: 'Dialogs provide a simple, consistent interface for applications to interface with users.',

问题 i am using JS-API to generate a dialogue which asks for permission to publish the status message generated by my Application. given below is the screenshot of what i am talking about: here is the code: FB.ui( { method: 'feed', name: 'Facebook Dialogs', link: 'http://developers.facebook.com/docs/reference/dialogs/', picture: 'http://fbrell.com/f8.jpg', caption: 'Reference Documentation', description: 'Dialogs provide a simple, consistent interface for applications to interface with users.',

问题 I thought jQuery's click() can let us add a handler or just click on an element? However, I tried: $(function() { setTimeout(function() { $('a').first().trigger('click'); // or click(), the same }, 3000); }); and waited 3 seconds and it won't click on the first <a> element in the page... how come? Update: this is related to What is the best way to make the Yahoo media player autostart, jQuery? and so there should already be event handler for clicking on a media, so how come .click() , which

问题 I am trying to make a JavaScript (jQuery is fine as well) function to check how long a user has been inactive for on the current page. I know that in JavaScript there are specific window events like window.onload , window.onmousemove , etc. But I was wondering if there was any function that captures any event (such as a mouse move, key press, or anything else that indicates activity by the user on the page) without having to set all of those event listeners manually? 回答1: Unfortunately there

问题 I'm writing a Chrome extension that places a button next to the "reply" button of each email. And elsewhere on the page is the main React component. When the component loads, i add listeners to a custom event: componentDidMount: function() { this.listenForFileEmailEvent(); }, listenForFileEmailEvent: function() { window.addEventListener("fileThisEmail", this.handleFileEmail, false); }, I place the button in each email and setup the event: $(document).on("click", ".file-this-email", function(e

问题 Using Object.create one can define setter and getter methods in javascript. o = Object.create(Object.prototype, { fooBar: { get: function() { return "Meh" }, set: function(value) { console.log(value) } } }); console.log(o) will always return Meh, and doing o = "Heyo" would only output the new value directly without changing o . Is there any reason as to why I should not use, or rely on this behavior to trigger events? What about two-way binding frameworks like angular and ember, do they make

问题 I find myself writing various functions which contain event handlers. It feels preferable to declare the variables required by the handler functions at the root of the parent function (closure), especially if they are jQuery selections, constants required by more than one handler, or some pre-computations needed which I wouldn't want to repeat each time en event is fired. A simple example: var touchDrag = function() { var x, y, i; var $mySelection = $('.selection'); $('#some-elem').on(