javascript-events

问题 So i've got 2 sets of js one with attach event and one with addEventListener attach event works perfectly in IE 8 as expected and addEventListener for IE 9. if i use addEventListener on firefox in jsfiddle it seems to work fine no issues in firefox but as soon as i deploy it and try to use it as intended it just doesn't work at all any input would be great.. IE 8 var formsCollection = document.getElementsByTagName("form"); var chain = ""; for(var i=0;i<formsCollection.length;i++) { // alert

问题 What I'm trying to do is put key codes in an array, to do some interesting stuff with later on. So, I capture the keystrokes, get the caret position and put the key code in the array (with some help from MooTools): var keyArray = []; $('form').addEvent('keyup', function(event) { var pos = document.activeElement.getCaretPosition(); keyArray[pos] = event.code; }); Generally speaking, this works great. However, I noticed some undefined values in my array when showing the complete array in my

问题 REWRITE: I have a select field with an associated onchange event. <select id='customer' onchange='loadRate(this.value)'> At some point in my code, I assign a value to this select field with Javascript. document.getElementById('customer').value = "Main St Packaging"; Why does this not trigger the onchange event? How do I fix it so that it does? Right now I am doing it by writing explicitly: loadRate('Main St Packaging') but I was wondering if there is a better way. 回答1: Try calling the

问题 REWRITE: I have a select field with an associated onchange event. <select id='customer' onchange='loadRate(this.value)'> At some point in my code, I assign a value to this select field with Javascript. document.getElementById('customer').value = "Main St Packaging"; Why does this not trigger the onchange event? How do I fix it so that it does? Right now I am doing it by writing explicitly: loadRate('Main St Packaging') but I was wondering if there is a better way. 回答1: Try calling the

问题 I am having some issues with multiple form submissions with a jquery/ajax form. I found this by printing every instance of form submission on my server, and saw that a form would submit correctly once, then again multiple times. Just to be clear, this code works 100% correctly for the first submission, but when I click on another row in my table, and create a new dialog/submit it, it ends up submitting multiple times. I think it has to do with event binding, but am having trouble fixing it.

问题 I have a search field with a custom dropdown results panel which is shown when typing a word in it or when it is focused. So my html looks something like this: <div class="input-group"> <input type="text" class="form-control" ng-model="userSearch" ng-change="onInputChange()" ng-focus="onInputChange()" ng-blur="onInputBlur()" /> <span class="input-group-btn"> <button type="button" ng-click="search()">Search</button> </span> </div> <div id="results" ng-if="panelShown"> <div ng-repeat="contact

问题 In this .addEventListener in MDN listener The object that receives a notification (an object that implements the Event interface) when an event of the specified type occurs. This must be an object implementing the EventListener interface, or simply a JavaScript function. It says we can use an object that implements the Event interface as listener for the event. But I can't find how can object to implement the Event interface. As I tried: document.querySelector('#demo').addEventListener('click

问题 I am creating a simple apps using html5 and java script. I want to show nearest places of any one city so already I set long and lat of a country. If user click school I want to show all school names nearest of long and lat with radius. If user click church I want to show all church names nearest of long and lat with radius. If user click hospital I want to show all hospital names nearest of long and lat with radius. etc. I only have this link and sample related code: https://maps.googleapis

问题 This solution works, but I don't understand what the second "return function()" does? for (var i = 0; i < photos.length; i ++) { img.onclick = (function(photo) { return function() { hotLink(photo); //window.location = '/pics/user/' + photo.user_id; }; })(photos[i]); Also, why do I have to include the (photos[i]); at the end? Before, I had this, and the onclick would always link to the last photo[i]. for (var i = 0; i < photos.length; i ++) { img.onclick = function() { window.location = 'pics

问题 Hi guys I'm building a backbone app for the first time - and its going great! However, I don't think I am creating views for my collection of models in the correct way and when I bind events they fire for every view when I only want them to fire for one. Here is my backbone code (a snippet): (function(){ Series = Backbone.Model.extend({ defaults:{ active:false } }); SeriesGridItemView = Backbone.View.extend({ el:'#model-grid', defaults: { active : false }, initialize: function(){ this.render(