hey guys,
I have an input field that looks for matched characters on a page. This page simply lists anchor links. So when typing I constantly load() (using the jquery load() method) this page with all the links and I check for a matched set of characters. If a matched link is found it's displayed to the user. However all those links should have e.preventDefault() on them.
It simply won't work. #found is the container that shows the matched elements. All links that are clicked should have preventDefault() on them.
edit:
/*Animated scroll for anchorlinks*/
var anchor = '',
pageOffset = '',
viewOffset = 30,
scrollPos = '';
$(function() {
$("a[href*='#']").each(function() {
$(this).addClass('anchorLink');
$(this).bind('click', function(e) {
e.preventDefault();
//console.log('test');
anchor = $(this).attr('href').split('#')[1];
pageOffset = $("#"+anchor).offset();
scrollPos = pageOffset.top - viewOffset;
$('html, body').animate({scrollTop:scrollPos}, '500');
})
});
});
Well, I'm looking for all href's that contain a #. So I know those elements are anchors that jump to other elements. I don't want my page to jump, but rather scroll smoothly to this element with this specific #id.
This works fine when I use bind('click', ... for normal page-elements that have been loaded when the page is opened. It doesn't work for anchors that have been loaded via ajax! If I change the bind to live nothing does change for the ajax loaded elements - they still don't work. However normal anchors that have always been on the page are not triggering the function as well. So nothing works with live()!
When you say "it won't work" do you mean that your function is not been called or that you can not cancel out of the function? As far as I know you can not cancel out live events. With jQuery 1.4 you can use return false to cancel out live event propagation. Calling e.preventDefault() won't work.
Edit: right so this code should in principal work. What it still won't do is, it won't add the 'anchorLink' class to your new anchors. However if the clicks work then let me know and I will give you the right code to add the class too!
var anchor = '',
pageOffset = '',
viewOffset = 30,
scrollPos = '';
$(function() {
$("a[href*='#']").each(function() {
$(this).addClass('anchorLink');
});
$("a").live('click', function(e) {
if ($(this).attr("href").indexOf("#") > -1) {
e.preventDefault();
//console.log('test');
anchor = $(this).attr('href').split('#')[1];
pageOffset = $("#" + anchor).offset();
scrollPos = pageOffset.top - viewOffset;
$('html, body').animate({ scrollTop: scrollPos }, '500');
//nikhil: e.preventDefault() might not work, try return false here
}
});
});
Related
I'm working on a page that is part of a pre-existing site. There is some script attached to the page that is overriding my searchbar 'enter' presses, so that every time I press enter it goes to the site-search page instead of my events-search page. This is my function:
$(".searchBox").keypress(function (e) {
var key = e.which;
if (key == 13) // the enter key code
{
var searchTerms = $(this).val();
var newQueryString = updateQueryStringParameter(resetPage(document.URL), "q", searchTerms);
window.location.href = newQueryString;
}
});
By stepping through it, I can see that it is hitting each line of my method, including window.location.href... but then it keeps going, and loads the wrong page even though newQueryString is correct.
I tried using document.location isntead of window.location.href, and I tried unbinding my searchbox
$(document).ready(function () {
$(".searchBox").unbind();
}
but it didn't work...
You can use preventDefault() method to stop the default event propagation.
$("#myForm").submit(function(event){
event.preventDefault();
});
http://api.jquery.com/event.preventdefault/
I have a page that is built around a wrapper with some very defined logic. There is a Save button on the bottom of the wrapped form that looks like this:
<form>
... my page goes here...
<input id="submitBtnSaveId" type="button" onclick="submitPage('save', 'auto', event)" value="Save">
</form>
This cannot change...
Now, I'm writing some javascript into the page that gets loaded in "...my page goes here...". The code loads great and runs as expected. It does some work around the form elements and I've even injected some on-page validation. This is where I'm stuck. I'm trying to "intercept" the onclick and stop the page from calling "submitPage()" if the validation fails. I'm using prototype.js, so I've tried all variations and combinations like this:
document.observe("dom:loaded", function() {
Element.observe('submitBtnSaveId', 'click', function (e) {
console.log('Noticed a submit taking place... please make it stop!');
//validateForm(e);
Event.stop(e);
e.stopPropagation();
e.cancelBubble = true;
console.log(e);
alert('Stop the default submit!');
return false;
}, false);
});
Nothing stops the "submitPage()" from being called! The observe actually works and triggers the console message and shows the alert for a second. Then the "submitPage()" kicks in and everything goes bye-bye. I've removed the onclick attached to the button in Firebug, and my validation and alert all work as intended, so it leads me to think that the propagation isn't really being stopped for the onclick?
What am I missing?
So based on the fact that you can't change the HTML - here's an idea.
leave your current javascript as is to catch the click event - but add this to the dom:loaded event
$('submitBtnSaveId').writeAttribute('onclick',null);
this will remove the onclick attribute so hopefully the event wont be called
so your javascript will look like this
document.observe("dom:loaded", function() {
$('submitBtnSaveId').writeAttribute('onclick',null);
Element.observe('submitBtnSaveId', 'click', function (e) {
console.log('Noticed a submit taking place... please make it stop!');
//validateForm(e);
Event.stop(e);
e.stopPropagation();
e.cancelBubble = true;
console.log(e);
alert('Stop the default submit!');
return false;
submitPage('save', 'auto', e);
//run submitPage() if all is good
}, false);
});
I took the idea presented by Geek Num 88 and extended it to fully meet my need. I didn't know about the ability to overwrite the attribute, which was great! The problem continued to be that I needed to run submitPage() if all is good, and that method's parameters and call could be different per page. That ended up being trickier than just a simple call on success. Here's my final code:
document.observe("dom:loaded", function() {
var allButtons = $$('input[type=button]');
allButtons.each(function (oneButton) {
if (oneButton.value === 'Save') {
var originalSubmit = oneButton.readAttribute('onclick');
var originalMethod = getMethodName(originalSubmit);
var originalParameters = getMethodParameters(originalSubmit);
oneButton.writeAttribute('onclick', null);
Element.observe(oneButton, 'click', function (e) {
if (validateForm(e)) {
return window[originalMethod].apply(this, originalParameters || []);
}
}, false);
}
});
});
function getMethodName(theMethod) {
return theMethod.substring(0, theMethod.indexOf('('))
}
function getMethodParameters(theMethod) {
var parameterCommaDelimited = theMethod.substring(theMethod.indexOf('(') + 1, theMethod.indexOf(')'));
var parameterArray = parameterCommaDelimited.split(",");
var finalParamArray = [];
parameterArray.forEach(function(oneParam) {
finalParamArray.push(oneParam.trim().replace("'","", 'g'));
});
return finalParamArray;
}
I have made a jQuery thing; with will load content without refreshing the page. The code for that is:
$(document).ready(function(){
// initial
$('#content').load('content/index.php');
// handle menu clicks
$('#navBar ul li ').click(function(){
var page = $(this).children('a').attr('href');
$('#content').load('content/'+ page +'.php');
return false;
});
});
Now I want to have a sort of history thing in that, the code for that is:
(function(){
// Bind an event to window.onhashchange that, when the hash changes, gets the
// hash and adds the class "selected" to any matching nav link.
$(window).hashchange( function(){
var hash = location.hash;
// Set the page title based on the hash.
document.title = 'The hash is ' + ( hash.replace( /^#/, '' ) || 'blank' ) + '.';
// Iterate over all nav links, setting the "selected" class as-appropriate.
$('#nav a').each(function(){
var that = $(this);
that[ that.attr( 'href' ) === hash ? 'addClass' : 'removeClass' ]( 'selected' );
});
})
// Since the event is only triggered when the hash changes, we need to trigger
// the event now, to handle the hash the page may have loaded with.
$(window).hashchange();
});
Found on: http://benalman.com/code/projects/jquery-hashchange/examples/hashchange/
My Question is: how can i make the second code working with the first?
Since you haven't gotten an answer yet I will write it. You need the plugin jQuery hashchange for the code to run.
https://github.com/cowboy/jquery-hashchange
To implement a cache you could do something like
$('#content').load('content/index.php');
//create a cache object
var cache = {};
// handle menu clicks
$('#navBar ul li ').click(function(){
var page = $(this).children('a').attr('href');
//check if the page was already requested
if(cache[page] === undefined){
//if not fetch the page from the server
$.get('content/'+ page +'.php', function(data){
$('#content').html(data);
//save data in cache
cache[page] = data;
}else{
//use data from cache
$('#content').html(cache[page]);
}
return false;
});
Use History JS. It works for HTML5 pushState and also falls back to HTML 4 hashtags. Also works for keeping the state model when the page is refreshed.
I don't think this is a Drupal-specific question, but more of a general jquery/ajax issue:
Basically, I'm trying to use javascript to add up form fields and display the result in a "subtotal" field within the same form. Everything is working fine until i click the option to add another field (via ajax), which then changes my "subtotal" field to zero, and won't work again until I remove the field.
Here is the function that adds up the fields:
function calculateInvoiceFields(){
var total = 0;
var rate = 0;
var quantity = 0;
var i = 0;
var $ = jQuery;
$("#field-aminvoice-data-values tr").each(function(){
// quantity field number
quantity = $("#edit-field-aminvoice-data-und-"+i+"-field-aminvoice-quantity-und-0-value").val();
// rate field as number
rate = $("#edit-field-aminvoice-data-und-"+i+"-field-aminvoice-rate-und-0-value").val();
if(!isNaN(quantity) && !isNaN(rate)){
total += quantity*rate;
}
i++;
});
return total;
}
And here are the functions that get fired for .ready and .live:
jQuery(document).ready(function(){
var $ = jQuery;
$(".field-type-commerce-price input").val(calculateInvoiceFields());
});
jQuery(function(){
var $ = jQuery;
$(".form-text").live('change', function(){
$(".field-type-commerce-price input").val(calculateInvoiceFields());
});
});
Any ideas would be a big help. Thanks in advance!
I recommend using 'on' for any binding statement. and 'off' for unbinding.
The reason it doesn't work after an AJAX call, is because you need to be watching for that element to be added to the DOM, and an event attached to it after it gets loaded. If you load a new element in, and there is nothing watching for it, it won't add the event watch to that new DOM element.
As below:
function calculateInvoiceFields(){
/*..*/
return total;
}
$(document).ready(function(){
$(".field-type-commerce-price input").val(calculateInvoiceFields());
$("body").on('change', ".form-text", function(){
$(".field-type-commerce-price input").val(calculateInvoiceFields());
});
});
usually it stops working when an error has been thrown. did you check out your javascript console (firefox firebug, or built in for chrome) for any indication of an error?
My program does an ajax call when the user clicks on a radio button. Upon success, the background color of the table cell containing the radio button is changed to let the user know their selection has been posted to the database.
The problem is sometimes the background doesn't change. I'm trapping for errors, so I don't think it's because of an error. I'm wondering if the user is outpacing the success callback.
var setup = {};
setup.url = 'Gateway.cfc';
setup.type= 'POST'
setup.dataType='json';
$.ajaxSetup(setup);
var settings = {};
settings.data = {};
settings.data.method = 'Save';
settings.data.AssignmentID = $('input[name=AssignmentID]').val();
settings.error = function(xhr, ajaxOptions, thrownError) {
$('#msgErr').text(thrownError);
};
settings.success = function(result) {
$('#msg').empty();
$('#msgErr').empty();
if (result.RTN) { // uppercase RTN
$('#' + settings.data.AnswerID).addClass('answer');
} else {
$('#' + settings.data.AnswerID).next().append('<span class="err"> ' + result.MSG + '</span>');
}
}
$('input').filter(':radio').change(function() {
var myName = $(this).attr('name');
$('input[name=' + myName + ']').closest('td').removeClass('answer');
settings.data.AnswerID = $(this).val();
$.ajax(settings);
});
There is a delay between your Ajax post to the server and the ui element update on your screen. I do not know which Ajax library you are using, but you could plug into the Ajax framework and display a floating div element that covers the whole screen. This div could have other elements like an image or other divs, spans, p tags, etc. This is also called a dialog in some libraries.
I would recommend trying to find the before_Ajax_send and after_Ajax_receive functions in your Ajax library and attaching your functions to these events. The before_send function should display the floating div and the after_receive should close the div.
Hope this helps.
Gonna post this as an answer, on the off-chance that it does the trick :)
$('input').filter(':radio').change(function() {
$(this).closest('td').removeClass('answer');
var mySettings = $.extend(true, {data:{AnswerID: $(this).val()}}, settings);
$.ajax(mySettings);
});
This will make sure there are no race conditions with your settings if calls are made in quick succession.