Develop Reference

Get div height befor the div content is fully loaded

I've got a button, that when I click executes a js code. Like this.
jQuery( ".button" ).on('click', function(){
var page = jQuery(this).attr('data-href');//Get data-href with permalink.
jQuery('#ajax_div').load(page,
function(){
var newHeight = jQuery('#content_loaded').height()+200;
var el = jQuery('#div_containing_ajax_div_and_content_loaded');
el.css({'height': newHeight + 'px'});
});
});
The first time it loads the page works wrong, but after have the images, etc, in cache it works ok. How can I wait that the content is fully rendered to execute the height calc?
All of this without use delay functions and with out use a plugin. There is a function like $(windows).ready().
I'm using wordpress, and with jquery load() it gets the height before the image is fully render and the height is less than the real height of the content in the div.
Thanks.

You could check that all images added are loaded using following snippet:
jQuery(".button").on('click', function () {
var page = jQuery(this).attr('data-href'); //Get data-href with permalink.
jQuery('#ajax_div').load(page, function () {
var $self = $(this),
$contentImages = $(this).find('img');
$contentImages.one('load', function () {
$(this).addClass('loaded');
if ($self.find('img.loaded').length === $contentImages.length) {
var newHeight = jQuery('#content_loaded').height() + 200;
var el = jQuery('#div_containing_ajax_div_and_content_loaded');
el.css({
'height': newHeight + 'px'
});
}
}).each(function () {
if (this.complete) $(this).triggerHandler('load');
});
});
});

maybe I should say that you have 2 ways to do that .. one I'm not tested it and another I tested it
1st: untested way .promise().done();
jQuery('#ajax_div').load(page).promise().done(function(){
// var newHeight ......
});
2nd: tested way in .load callback function loop through images and check if loaded or not using Image.error(function() {});
$('img').each(function(){
var Image = $(this);
var GetSrc = $(this).attr('src');
Image.error(function() {
// newHeight ......
});
});
DEMO

Jquery Scroll() requires 2 Arguments

I am trying to remove a class from a menu bar when the user scrolls down a page. I read the following topic and doc to get an idea on jquery scroll():
1) https://stackoverflow.com/a/16391580/1050957
2) http://api.jquery.com/scroll/
This is my code:
var jquery = jQuery.noConflict();
jquery(document).ready(function(){
$(window).scroll(function () {
if (document.body.scrollTop > 100)
$('#menuBar').removeClass( "nav-menu" );
else
// something something
});
});
The above code is an extract from the SO answer from another topic (link given above). But when I add that code, I am seeing: Not enough arguments to Window.scroll. error for $(window).scroll(function (). I dont know why its expecting 2 arguments since the doc I read on scroll() uses without an argument. Have I done something wrong? Or has something changed with the later version of Jquery?
I am using jquery v1.11.0

Use a full jquery code. Working example:
#menuBar { background: yellow; width: 50px; height: 800px; }
#menuBar.nav-menu { background: red; }
<div id="menuBar" class="nav-menu"></div>
<div style="margin-bottom: 999em;"></div>
$(document).ready(function(){
$(window).on('scroll', function () {
var $body = $('body');
var $target = $('#menuBar');
if ($body.scrollTop() > 100 && $target.hasClass('nav-menu')){
$target.removeClass("nav-menu");
}
else if( $body.scrollTop() <= 100 && !$target.hasClass('nav-menu') ){
$target.addClass('nav-menu');
}
});
});
Make sure to check if the class is already added to prevent innecesary stuff.
Check jsfiddle

You can add an empty param if needed to your scroll function:
$(document).ready(function(){
$(window).scroll([], function () {
...
});
});
Take a look at this:
http://colorlib.com/wp/forums/topic/fix-a-bug-in-latest-version-window-scroll/

scroll down function on click

below is the code I have for scrollTop. It works fine when I target a specific pixel, but I want to scroll down 300px, instead of scrollTop a certain div on click. can anyone help?
<div id="button"></div>
<div1 style="height:300px;">img1</div>
<div2 style="height:300px;">img2</div>
<div3 style="height:300px;">img3</div>
<div4 style="height:300px;">img4</div>
$(function() {
$("#button").on("click", function() {
$("html, body"). animate({"scrollTop":$().offset().top-300}, 1000);
return false;
});
});

Try using window.scrollBy(0,300);

$().offset().top doesnt do much of anything. Replace it with window.scrollY
$(function() {
$("#button").on("click", function() {
$("body").animate({"scrollTop": window.scrollY-300}, 1000);
return false;
});
});
Also negative is up and positive is down when we're talking about scrolling so you probably want to add 300 instead.

I think it's the best way.
var body = $('html, body');
$('#button').click(function() {
var n = $(document).height() - $(window).height();
body.stop().animate({scrollTop: n }, 1000, function() {
});
});

Why doesn't my <div> slide with these jquery code?

I want to reduce my <div> size when I click on a <a> . But it doesn t work.
Javascript code
(divheight is a global variable)
function jamsho(id) {
var idd=id.substr(1);
alert(document.getElementById(idd).style.height);
if(document.getElementById(idd).style.height != 30) {
$(id).stop().animate({height:30}, 700);
divheight=document.getElementById(idd).style.height;
} else if (document.getElementById(idd).style.height == "30px") {
$(id).animate({height:divheight}, 700);
}
}
And call the function :
<div class="linkbox" id="linksbox">
<a id="Titr" onClick="jamsho('#linksbox')"> پیوند ها</a>
سایت روان آنلاین
</div>

ditch the onclick, ditch the vanilla js. It's as simple as follows:
jsFiddle Example
HTML
<div class="linkbox" id="linksbox">
<a id="Titr"> پیوند ها</a>
سایت روان آنلاین
</div>
jQuery
$('#Titr').click(function(e) {
e.preventDefault();
var par = $(this).parent();
par.animate({height:par.height()==30?'':30},700);
});
And if you want something more "dynamic":
$('.linkbox').on('click', 'a:first', function(e) {
e.preventDefault();
var par = $(this).parent();
par.animate({height:par.height()==30?'':30},700);
});
Keep in mind, last solution only works for jQuery versions 1.7 and above, for older version, replace .on with .delegate

You're sure that this condition document.getElementById(idd).style.height!=30 is satisfied?
I believe that the property height comes as string with the "px" sufix. See this.
So, to work it may be if (document.getElementById(idd).style.height!="30px").
BTW, is a best pratice to use only jQuery or pure Javascript, not mix them.

You could use jQuery for all of the function, instead of part of it:
function jamsho(id)
{
var $this = $(id);
alert($this.height());
if ($this.height() != 30)
{
$this.stop().animate({height:30},700);
divheight = $this.height();
}
else if ($this.height() == 30)
{
$this.animate({height:divheight},700);
}
}

I don't think you can apply jQuery animations to non-jQuery Objects
function jamsho(id) {
alert($(id).css("height");
if($(id).css("height")!=30)
{
$(id).stop().animate({height:30},700);
divheight=$(id).css("height");
}
else if ($(id).css("height")==30)
{
$(id).animate({height:divheight},700);
}
}

Try something like this:
var $div = $('#linksbox'),
divHeight = $div.height();
$('#Titr').click(function() {
if (!$div.hasClass('expanded')) {
$div.animate({height: 40}, 700, function() {
$(this).addClass('expanded');
});
}
else {
$div.animate({height: divHeight}, 700, function() {
$(this).removeClass('expanded');
});
}
});
http://jsfiddle.net/ZqEZ5/
A few notes:
no need to use document.getElementById with jQuery
don't use inline event handlers onClick.
Hope it helps.

whats wrong with this code? im trying to change the height of each section to the height of window

whats wrong with this code? im trying to change the height of each section to the height of window.
function setsize()
{
var w=$(window).width();
var h=$(window).height();
var sections = new Array("home","about","skills");
for (var i=0;i<3;i++)
{
var element = document.getElementById(sections[i]);
$(element).height(h);
}
}
$(window).ready(function() {
setsize();
});
$(window).resize(function() {
setsize();
});
here is sample of the markup:
<section id="#home">
<h1>..................</h1>
</header>

Seems like a strange way to do that ?
$(window).on('resize load', function() {
$('#home, #about, #skills').height( $(this).height() );
});
You have to update the variables when the window changes size, i.e. inside the resize function
EDIT:
You'll also need a DOM ready handler, and window.onload isn't always triggered when doing it that way, so just do the same thing on DOM ready, like so :
$(function() {
$('#home, #about, #skills').height( $(window).height() );
$(window).on('resize', function() {
$('#home, #about, #skills').height( $(this).height() );
});
});
FIDDLE