jquery

问题 Let's say I want to develop a third party plugin, like a chrome extension. So I will have absolutely no privilege to change the javascript code of the page. All I can do is add things external to the page. So I would use jQuery to manipulate the DOM. But if the page is rendered by react, what I did to the DOM would be erased in the react lifecycle. I see some tutorials teaching how to integrate jQuery in to a react app. But this is not what I need. Is there any way to manipulate the DOM

问题 I just refer this link to get idea how to get the column total in jquery data tables. But I have done half of my project. I do not have any definition in html page. all include in Jquery side. In HTML <table id="tblCollection" class="display" cellspacing="0" width="100%"> </table> Defined data table like below in Jquery. tblColectionData = $("#tblCollection").DataTable({ "ordering": true, columns: [ { title: 'OrderId', data: 'OrderId' }, { title: 'Ordered Date', data: 'OrderPlaceDateTime' },

问题 I wish to take the value of an HTML string contained within <bdi> tags - perform a calculation on it - and output the results in a separate <bdi> string, dependent on which input is selected on-page. The source <bdi> value changes dynamically based on user interaction, but I want to know if what I'm asking is feasible and a rough guide on how to achieve it? Screenshot to illustrate the user elements: In the DOM, the source value is nested in the below tag: <li class="grand_total"> <span class

问题 I've read some other questions about this topic and many say that if I declare the variable varA outside my function (in de global scope), it is a global function, and so it is accessible for any function to use and update, right? Now, I have this example where I declare a variable outside a function, alter it inside the function, but when I call it outside the function, it displays as undefined , where if I'm to call it inside the function, it is altered. $(document).ready(function() { var

问题 I wish to take the value of an HTML string contained within <bdi> tags - perform a calculation on it - and output the results in a separate <bdi> string, dependent on which input is selected on-page. The source <bdi> value changes dynamically based on user interaction, but I want to know if what I'm asking is feasible and a rough guide on how to achieve it? Screenshot to illustrate the user elements: In the DOM, the source value is nested in the below tag: <li class="grand_total"> <span class

问题 my code is : $('form').submit(function(){ var email = $('#email').val(); var dataString = 'email='+email; var datadata; $.ajax({ type : "get", url : "checkEmail.php", data : dataString, dataType : "html", success : function(result){ datadata = result; } }); alert(datadata); return false; }); why this datadata is undefine ? i develope a from. and i must check duplicate email by ajax befor submit. it return catect result but form will submited. 回答1: the ajax call is asynchronous, which means

问题 I have been trying for days to get jquery autocomplete to work the way I need it to. so far I have this which works fine: <script> $(function() { var availableTags = [<?php $taglist = Array(); foreach ($users as $user) if ($user->getAttribute('first_name') == ''){ $taglist[] = '"'.$user->getUserName().'"'; }else{ $taglist[] = '"'.$user->getAttribute('first_name').' '.$user->getAttribute('last_name').'"'; } echo join(',', $taglist); ?>]; $("#searchmem").autocomplete({ source: availableTags,

问题 I am working on building Multi-level(second level) drop-down. The Drop-down works on Bootstrap-js version 4. But the drop-down not working in Bootstrap-5-beta. The Working Bootstrap 4 version is provided here. However, the Bootstrap-5-beta jsfiddle version the drop-downs not working with Bootstrap 5 Js. The dropdown Works as I change bootstrap-5-js to bootstrap-4-js Am I missing a class with jquery selector, any help would be appreciated. Edit : Although both the answers works fine, but the

问题 I have this website: https://www.australianathleticscalendar.com.au/ I want to make it so you can have selected an 'Events' filter and 'State' filter at once (I.e. 100m and QLD at once), and the bubbles in each filter will have styling (I.e. like :focus). With each filter, select one category. When you change categories within a filter, the previous one selected must also be unstyled (I.e. can't select 100m and 200m at once. Moving from 100m to 200m would remove styling from 100m and add it

问题 I have this website: https://www.australianathleticscalendar.com.au/ I want to make it so you can have selected an 'Events' filter and 'State' filter at once (I.e. 100m and QLD at once), and the bubbles in each filter will have styling (I.e. like :focus). With each filter, select one category. When you change categories within a filter, the previous one selected must also be unstyled (I.e. can't select 100m and 200m at once. Moving from 100m to 200m would remove styling from 100m and add it