preventdefault

问题 Can you please help me to locate on which element "taphold" is fired by using js, jquery or jq mobile. my html structure is like mentioned below <script> $(document).on("pagecreate", function () { $("#myFilesListView").bind('contextmenu', function (event) { event.preventDefault(); event.stopPropagation(); return false; }); }); $(document).ready(function () { $("#myFilesListView").bind("taphold", function (event) { event.preventDefault(false); event.stopPropagation(); var ID = $(this).child()

问题 I'm following this example to make a javascript html5 DnD (drag and drop): http://www.html5rocks.com/en/tutorials/dnd/basics/ To prevent the default behavior for some browsers the default event is prevented. I understand the need. But why is there also an if statement? function handleDragOver(e) { if (e.preventDefault) { e.preventDefault(); // Necessary. Allows us to drop. } // Why this if statement?, To me it seems double: if it is already there (if true), do it again...? Thanks for anyone

问题 I've a set of jquery and generally javascript function in a js. Now I want to avoid some of the functions to be available on some condition. For example: function test () { alert("hi"); } function avoid () { if(condition) { //here avoid to call test } } Thanks 回答1: If you want to remove a function without errors (provided the caller of the function doesn't expect a returned result), you might do function avoid () { if(condition) { test = function(){}; // does nothing } } Note that if your

问题 I have this code which prevents default behavior on all elements: $('body *').click(function(e){ e.stopPropagation(); e.preventDefault(); }); Now I would like to programmatically click a certain link in the page but first I have to remove the e.preventDefault(); so I used unbind : $('a')[0].unbind('click'); $('a')[0].click(); This doesn't work for me. What am I doing wrong? 回答1: You can't do $('a')[0].unbind('click') use .eq() to get the first element and then unbind .eq(0).unbind('click') 来源

问题 I am using chrome latest version. My application throws error: Unable to preventDefault inside passive event listener due to target being treated as passive. See https://www.chromestatus.com/features/6662647093133312 It hinders it ability to properly scroll i.e. jerky scroll. I tried many solutions on the internet but it couldn't solve it. Please help me on this. I am using css3, bootstrap and html. I tried to add passive attribute etc but seems like nothing is working. My code: <!DOCTYPE

问题 I am new to JavaScript and I have written the code below, which is supposed to be taking the input of a form field (in that case of the lastname) and in case it is empty, it will not allow me to be redirected to next page. However, it doesnt work.. Does anybody know why or how I could fix it? Thank you in advance! window.addEventListener("DOMContentLoaded", init, false); function init() { var form = document.querySelector("form"); form.addEventListener("submit", function(e) { validate(e); e

问题 I'm using Swipebox : http://brutaldesign.github.io/swipebox/ I know that I can open a content with swipebox slide like that // Link to click <a href="#mydiv" class="my-swipebox">Click to show</a> // And the div in html <div id="#mydiv">Click <a href="http://example.com">Here</div> The problem is I can't click the link inside this div when it opened by swipebox on mobie (on desktop it working very fine) The chrome browser show this log : [Intervention] Unable to preventDefault inside passive

问题 My goal is to show a different first page depending on whether the user is logged in or not. The login check happens using a synchronous Ajax call, the outcome of which decides whether to show a login dialog or the first user page. The normal way to do this would be to set $.mobile.autoInitialize = false and then later on initialize programmatically, as described in the answer to this question. For some reason this won't work, instead another page gets loaded every single time. I decided to

问题 I am displaying a password prompt instead of submitting the form when user clicks the submit button of a form. I want the form to submit when the user clicks the "Ok" button of the prompt. I am using jquery impromptu plugin (tried both with Version 3.1 and 4.0.1). I am in a hurry abd not getting what is wrong with my code or am I missing something completely. Here is my code - Trial 1 HTML part <form name="frmAddAdnetworkTemplate" id="frmAddAdnetworkTemplate" action="someAction"> ... ...

问题 I have a search input box which when a user presses enter needs to do nothing. I am using EmberJS and Jquery with the below code. Currently it works to disable a pop up from being triggered but for some reason in IE9 when enter is pressed a toggle button becomes in focus. Works fine in Chrome. I've tried tabindex and preventDefault but neither do the trick. if ($el.hasClass('form-control')) { if ( e.which == 13) { this.get('controller').flipit(); } } Thank you. EDIT------ Here is a snippet of