Develop Reference

Fade in on switching classes in javascript

I am sure my problem is pretty easy to solve. I want to apply fade in when my header became visible and fadeout when it isn't visible. So i don't want to be that rough. I tried with header.removeClass('clearHeader').addClass("darkHeader").fadeIn(slow); but that didn't help me. I also tried to add transitions in CSS but that didn't help me too.
Javascript:
$(function() {
//caches a jQuery object containing the header element
var header = $(".clearHeader");
$(window).scroll(function() {
var scroll = $(window).scrollTop();
if (scroll >= 50) {
header.removeClass('clearHeader').addClass("darkHeader");
} else {
header.removeClass("darkHeader").addClass('clearHeader');
}
});
});
CSS:
header {
width:100%;
height: 70px;
position: fixed;
z-index:999;
background-color:#fff;
box-sizing:border-box;
}
header nav {
display:inline-block;
float:right;
line-height:70px;
}
header nav a {
margin-left: 25px;
font-weight: 700;
font-size: 18px;
}
header nav a:hover {
text-shadow:1px 1px 1px red;
}
.clearHeader{
display:none;
opacity:0;
width: 100%;
-webkit-transition:all 1s ease-in-out;
-moz-transition:all 1s ease-in-out;
-o-transition:all 1s ease-in-out;
-ms-transition:all 1s ease-in-out;
transition:all 1s ease-in-out;
}
.darkHeader {
display:visible;
opacity:1;
z-index:999;
}
CODE PEN

try by remove opacity and display visible code from css and try fadeIn and fadeOut Like:
if (scroll >= 50) {
header.removeClass('clearHeader').addClass("darkHeader").fadeIn('slow');
} else {
header.removeClass("darkHeader").addClass('clearHeader').fadeOut('slow');
}

To solve your problem you can simply use jQuery's animate. Here's the syntax and explanation. It smoothly animates any css property you would want to animate. Therefore you can do:
CSS:
header {
opacity:1;
}
(just sets the default)
JS:
header.animate({opacity: "0"}, 500);
To fade out, and the same thing but with opacity 1 to fade in. You may want to comment out the display part of your classes for testing though, as it may influence how it all behaves.

Sliding div's and stacking them (JavaScript)

I'm in the middle of making my website and I got a little road bump. This is how my code looks right now, and what I want to do is have the "About" box right below the "Home" box and have the above box slide down with the description that comes when you click the "Home" box. How may I do that?
This is the code to my JS file.
$(document).ready(function (event) {
var clicked=false;
$(".one").on('click', function(){
if(clicked)
{
clicked=false;
$(".two").css({"top": -40}); //Slides upwards 40pixels
}
else
{
clicked=true;
$(".two").css({"top": 0}); //Slides righ under "one"
}
});
var clicked2=false;
$(".three").on('click', function(){
if(clicked2)
{
clicked2=false;
$(".four").css({"top": -100}); //Slides upwards 40pixels
}
else
{
clicked2=true;
$(".four").css({"top": 0}); //Slides righ under "one"
}
});
});
On a complete side note, how could I get the boxes to start from the top of the page and how could I make he box be a huge box rater than a tiny strip of color?

you can try this one:
.container {
overflow:hidden;
}
.one {
position: relative;
top: 0;
background-color: #FFC300;
z-index: 1;
cursor:pointer;
}
.two {
position: relative;
top: -40px;
background-color: yellow;
z-index: -1;
-webkit-transition: top 1s;
-moz-transition: top 1s;
-o-transition: top 1s;
transition: top 1s;
}
.three{
position: relative;
top: 0;
background-color: #E9A1B9;
z-index: 1;
cursor:pointer;
}
.four {
position: relative;
top: -18px;
background-color: #02C9C9;
z-index: -1;
-webkit-transition: top 1s;
-moz-transition: top 1s;
-o-transition: top 1s;
transition: top 1s;
}
DEMO HERE

I would use a negative margins and toggle a simple .open class on the .one and .three divs :
$(".one, .three").click(function(){
$(this).toggleClass('open');
});
CSS :
.one, .three {
margin-bottom: -40px;
-webkit-transition: margin-bottom 1s;
-moz-transition: margin-bottom 1s;
-o-transition: margin-bottom 1s;
transition: margin-bottom 1s;
}
.open {margin-bottom: 0}
jsFiddle demo

You can simplify this a bit by using the jQuery toggle() function to do the work for you. (edit: you could also use slideToggle() for a different effect)
$(selector).toggle(speed,callback);
The optional speed parameter can take the following values: "slow", "fast", or milliseconds.
The optional callback parameter is a function to be executed after toggle() completes.
html
<div class="container">
<div class="one">Main</div>
<div class="two" style="display: none">Welcome to my page!</div>
<div class="three">About</div>
<div class="four" style="display: none">All about me</div>
</div>
css
.one {
background-color: #FFC300;
cursor:pointer;
}
.two {
background-color: yellow;
}
.three{
background-color: #E9A1B9;
cursor:pointer;
}
.four {
background-color: #02C9C9;
}
js
$(document).ready(function (event) {
$(".one").on('click', function(){
$(".two").toggle("slow");
});
$(".three").on('click', function(){
$(".four").toggle("slow");
});
});
DEMO:
https://jsfiddle.net/qbuatjrm/4/

Make a hamburger ID work in two headers

I am creating a clone of the header and when the scroll reach a certain height, the clone version will display. This works, as I want. The problem is that I am trying to get the “hamburger” action to work in both headers. Now it only works in first section. I need to get it working in section two also. I know I have used an ID (“trigger-overlay”), which should only be used one time and be unique.
Is this correct and the reason why it is not working? Do you guys know a workaround to fix this problem?
I need it to be an ID because of a more complex code in another script, but if it’s not possible to keep it I will do it in another way. I appreciate any help here. See JSFiddle
HTML
<section id="one">
<header class=""> <a id="trigger-overlay" class=""><span class="hamburger"></span></a>
</header>
</section>
<section id="two"></section>
CSS
section {
height:100vh;
}
#one{
background-color:#0097a7;
}
#two{
background-color:#00bcd4;
}
.hamburger, #trigger-overlay .hamburger:before, #trigger-overlay .hamburger:after {
cursor: pointer;
background-color:#80deea;
width:25px;
height:3px;
display:block;
border-radius:6px;
-webkit-transition:top 0.3s 0.2s ease, bottom 0.3s 0.2s ease, background-color 0.3s ease, -webkit-transform 0.3s ease;
transition:top 0.3s 0.2s ease, bottom 0.3s 0.2s ease, background-color 0.3s ease, transform 0.3s ease;
}
#trigger-overlay {
float: left;
margin-left:15px;
}
.hamburger:before, .hamburger:after {
content:"";
position:absolute;
}
.hamburger {
position:relative;
top:19px;
}
.hamburger:before {
top:-7px;
}
.hamburger:after {
bottom:-7px;
}
/*Hamburger hover*/
#trigger-overlay .hamburger:hover, #trigger-overlay .hamburger:hover:before, #trigger-overlay .hamburger:hover:after {
background-color: #00838f;
}
header {
position: relative;
width: 100%;
height: 60px;
background-color:#00acc1;
}
header.clone {
position: fixed;
background-color: #00acc1;
top: 0px;
left: 0;
right: 0;
transform: translateY(-100%);
transition: 0.2s transform cubic-bezier(.3, .73, .3, .74);
}
body.down header.clone {
transform: translateY(0);
}
Vanilla JS
var triggerBttn = document.getElementById( 'trigger-overlay' );
var sticky = {
sticky_after: 200,
init: function () {
this.header = document.getElementsByTagName("header")[0];
this.clone = this.header.cloneNode(true);
this.clone.classList.add("clone");
this.header.insertBefore(this.clone, this.header.childNodes[1]);
this.scroll();
this.events();
},
scroll: function () {
if (window.scrollY > this.sticky_after) {
document.body.classList.add("down");
} else {
document.body.classList.remove("down");
}
},
events: function () {
window.addEventListener("scroll", this.scroll.bind(this));
}
};
function toggleOverlay() {
alert("I want to be active in both headers ");
}
triggerBttn.addEventListener( 'click', toggleOverlay );
document.addEventListener("DOMContentLoaded", sticky.init.bind(sticky));

Unfortunately just using the same ID won't give you the same EventListeners. But, it's easy to get around your problem by simply adding the same EventListeners to the newly created clone:
document.getElementsByClassName('clone')[0].addEventListener('click', toggleOverlay);
See a working version of your Fiddle here: http://jsfiddle.net/qfbq2b0k/4/

Hiding Dropdown "caret" when sticky header is present

So right now I'm building out our new website, and I've programmed a nice little sticky header using javascript. Here's my Javascript.
http://dev.yoursparksource.com
<script>
jQuery(window).scroll(function() {
if ($(this).scrollTop() > 1){
$('.stickyheader1').addClass("sticky");
}
else{
$('.stickyheader1').removeClass("sticky");
}
});
</script>
And my CSS for the stickyheader and .sticky added class
.stickyheader1 {
position: fixed;
width: 100%;
-webkit-transition: background .3s ease-in-out;
-moz-transition: background .3s ease-in-out;
-ms-transition: background .3s ease-in-out;
-o-transition: background .3s ease-in-out;
transition: background .3s ease-in-out;
height: 85px;
}
.stickyheader1.sticky {
background: rgba(0,0,0,0.80);
-webkit-transition: background .4s ease-in-out;
-moz-transition: background .4s ease-in-out;
-ms-transition: background .4s ease-in-out;
-o-transition: background .4s ease-in-out;
transition: background .4s ease-in-out;
}
And this works PERFECT. My problem is the dropdown menu. I styled a little CSS caret, and when you scroll down and the header background activates, the caret is on top of the header's space, and you can see it behind the semi-transperent header. (EWW! Tacky...)
What I'm wondering, is how can I target this element, as it's an :after pseudo class.. Here's the current CSS for the caret (or top triangle as some call it.)
#nav ul ul:After {
content: '';
position: absolute;
border-style: solid;
border-width: 0 10px 10px;
border-color: rgba(0,0,0,0.40) transparent;
display: block;
width: 0;
z-index: 1;
top: -10px;
left: 20px;
}
I tried just using the same javascript with the "#nav ul ul:After", but after researching, I learned how you can't add styles to a pseudo class. Duh, I knew that, just forgot. That's all. ;-) Any assistance on getting that little caret to go away when I scroll and the stick header's bg activates? Would be a lifesaver for me. (Also, if it can animate with the opacity transition like the header, that would rock. Once I figure out how to target it, I can add the css animation.
Thanks a MILLION in advance! I love StackOverflow.

You will need JavaScript to loop through the stylesheet, find the rule for #nav ul ul:After and set its display property to none after the sticky class is added to .stickyheader1.
jQuery(window).scroll(function() {
if ($(this).scrollTop() > 1) {
$('.stickyheader1').addClass("sticky");
var ss = document.styleSheets;
for (i = 0; i < ss.length; i++) {
var rules = ss[i];
for (j = 0; j < rules.cssRules.length; j++) {
var r = rules.cssRules[j];
if (r.selectorText == "#nav ul ul:After" || r.selectorText == "#nav ul ul::After") {
r.style.display = 'none';
}
}
}
} else {
$('.stickyheader1').removeClass("sticky");
}
});

Fade one image into another using css or jquery

I need to be able to fade in a second image above the initial image on hover. I need to make sure that second image isn't visible initially until it fades in. The other important note is that neither of the images should fade out entirely at any time. I've tried several approaches such as using 1 image, 2 images, jquery animate and css transition.
I've read that it is possible to animate a change of attribute using jquery? If this is true, how could I animate the change of 'src' in img using jquery?
$(".image").mouseenter(function() {
var img = $(this);
var newSrc = img.attr("data-hover-src");
img.attr("src",newSrc);
img.fadeTo('slow', 0.8, function() {
img.attr("src", newSrc);
});
img.fadeTo('slow', 1);
}).mouseleave(function() {
var img = $(this);
var newSrc = img.attr("data-regular-src");
img.fadeTo('slow', 0.8, function() {
img.attr("src", newSrc);
});
img.fadeTo('slow', 1);
});
This is what i'm currently using. It's the closest i've gotten. But you can see the image change which is not desirable.

Using a single html element with background images
HTML - doesn't get simpler than this
<div id="imgHolder"></div>
CSS
#imgHolder {
width: 200px;
height: 200px;
display: block;
position: relative;
}
/*Initial image*/
#imgHolder::before {
content:"";
top: 0;
left: 0;
bottom: 0;
right: 0;
position: absolute;
background-image:url(http://placehold.it/200x200);
-webkit-transition: opacity 1s ease-in-out;
-moz-transition: opacity 1s ease-in-out;
-o-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out;
z-index:10;
}
#imgHolder:hover::before {
opacity:0;
}
#imgHolder::after {
content:"";
background: url(http://placehold.it/200x200/FF0000);
top: 0;
left: 0;
bottom: 0;
right: 0;
position: absolute;
z-index: -1;
}
Demo
OR if you want to use image tags...
Stealing straight from: http://css3.bradshawenterprises.com/cfimg/
HTML
<div id="cf">
<img class="bottom" src="pathetoImg1.jpg" />
<img class="top" src="pathetoImg2.jpg" />
</div>
CSS
#cf {
position:relative;
height:281px;
width:450px;
margin:0 auto;
}
#cf img {
position:absolute;
left:0;
-webkit-transition: opacity 1s ease-in-out;
-moz-transition: opacity 1s ease-in-out;
-o-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out;
}
#cf img.top:hover {
opacity:0;
}
There are many other examples in the link as well to play with, but this will get you started.
Final Opacity
You've mentioned you don't want the initial image to disapear comletely. To do this change opacity:0 to opacity:0.5 or something similar. You'll need to experiment with that value to get the result you want.
Demo with final opacity of 0.8
Dynamic Image Sizes
I think you will be stuck with the two image version for this if just using CSS. HTML is the same.
CSS
#cf {
position:relative;
}
#cf img {
-webkit-transition: opacity 1s ease-in-out;
-moz-transition: opacity 1s ease-in-out;
-o-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out;
}
#cf img.bottom {
z-index:-1;
opacity:0;
position:absolute;
left:0;
}
#cf:hover img.top {
opacity:0.8;
}
#cf:hover img.bottom {
display:block;
opacity:1;
}
Demo