Develop Reference

How do I get a menu to go on top of everything?

I am trying to have a menu that takes up 100vh when the menu button is clicked. However, I also have a header at the top so the menu content is lower than it. How do I make the menu go on top of the header? I'm trying to do this without making the header display: none because I want it to be shown on the side - in the left over space from making the menu have a view width of 80vw.
header {
height: 3.4rem;
display: grid;
align-items: center;
z-index: 1;
}
.menu {
z-index: 2;
position: relative;
background-color: #000;
margin-left: 4rem;
}
.menu-container {
width: 80vw;
height: 100vh;
margin-left: 2.5rem;
margin-top: 2rem;
}
<header>
<div class="header-container">
<div class="left">
<img src="img/logo.jpg" alt="">
</div>
<div class="right">
<img src="img/user.png" alt="">
<i class="fa-solid fa-bars fa-xl"></i>
</div>
</div>
</header>
<nav class="menu">
<div class="menu-container">
<div class="top-menu">
Premium
Support
Download
<div class="menu-line"></div>
</div>
<div class="bottom-menu">
Account
Log out
</div>
<img src="img/logo.jpg" alt="">
</div>
</nav>
(I did not add all the CSS to do with the menu and header because the rest of it is irrelevant.)
How do I move the menu to go on top?

I think position: relative is not set properly, it should only be on a parent that contains both header and nav. And then set the following css :
.menu {
position: fixed;
top: 0;
left: 0;
height: 100vh;
width: 80vw;
}
Add margin and background if you want.
Now nav should be above header.

I believe the issue lies in the position and z-index of your .menu and header css. Try making the position: absolute for both absolute and change the z-index of menu to 1 and header to 2 so that it shows menu on top of header.
Reference: https://developer.mozilla.org/en-US/docs/Web/CSS/z-index

How can I implement this horizontal search result bar?

I essentially have a horizontal div that populates content from omdb API. It dynamically generates a bunch of search results, and displays them all; however the overflow: hidden is active.
I have 2 questions:
I have two custom "buttons" that I made with an empty div and icon. I gave it a bit of a box-shadow to give it the illusion that it's hovering. Is it better practice to use a button element instead, or does it matter?
My main question is this: I want to be able to navigate back and forth between my search results using my arrow buttons. What would be the best way to implement this? The only thing I can think of is using the buttons to adjust the left or right margins of my search results. (ie. pressing the left button would adjust the margin-left of my results with a negative margin, and the right arrow would adjust it with a positive margin)
However, this feels crude and not very accurate. Meaning with a few extra clicks, the content could be pushed out of the view entirely (either by accident or on purpose).
Is there a way to set this up more efficiently?
Here is some code as an example:
const leftArrow = document.querySelector("#left-arrow");
const rightArrow = document.querySelector("#right-arrow");
const marginSelector = document.querySelector("#nav-margin");
var marginValue = -20;
leftArrow.addEventListener('click', () => {
marginSelector.style.marginLeft = marginValue + "px";
marginValue += -20;
});
.scrollbar-container {
width: 800px;
display: flex;
border: 1px #5e9af9 solid;
position: relative;
top: 100px;
overflow: hidden;
margin: auto;
align-items: center;
}
.result-container {
display: inline-block;
margin: 2px;
}
img {
display: inline-block;
vertical-align: middle;
position: relative;
}
.nav-button {
position: absolute;
width: 50px;
height: 50px;
background: rgba(230, 232, 237, .5);
text-align: center;
margin: auto 0;
}
.left-arrow {
left: 1%;
}
.right-arrow {
right: 1%;
}
.margin-start {}
<script src="https://use.fontawesome.com/releases/v5.0.6/js/all.js"></script>
<div class="scrollbar-container">
<div id="nav-margin" class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div id="left-arrow" class="nav-button left-arrow">
<i class="fas fa-angle-left fa-3x"></i>
</div>
<div id="left-arrow" class="nav-button right-arrow">
<i class="fas fa-angle-right fa-3x"></i>
</div>
</div>

I've written script to move back and forth the search results. You just need to check and adjust the marginLeft value for your marginSelector. I've added transition into the CSS of #nav-margin so that it looks smooth. marginValue is been initialized with 0. max-width of container has been set to 500px for convenience. When you change your max-width do not forget to change it in addEventListener for rightArrow. You can also make the value inside if condition to dynamic so that it actually takes the value from .scrollbar-container.
Let me know if you have any queries.
const leftArrow = document.querySelector("#left-arrow");
const rightArrow = document.querySelector("#right-arrow");
const marginSelector = document.querySelector("#nav-margin");
var marginRightValue = 0;
rightArrow.addEventListener('click', () => {
if(-(marginRightValue) <= (500+20))
marginRightValue += -100;
marginSelector.style.marginLeft = marginRightValue + "px";
});
leftArrow.addEventListener('click', () => {
if(marginRightValue < 0)
marginRightValue += 100;
marginSelector.style.marginLeft = marginRightValue + "px";
});
.scrollbar-container {
max-width: 500px;
display: flex;
border: 1px #5e9af9 solid;
position: relative;
top: 100px;
overflow: hidden;
margin: auto;
align-items: center;
}
#nav-margin{
transition: all 1s;
}
.result-container {
display: inline-block;
margin: 2px;
}
img {
display: inline-block;
vertical-align: middle;
position: relative;
}
.nav-button {
position: absolute;
width: 50px;
height: 50px;
background: rgba(230, 232, 237, .5);
text-align: center;
margin: auto 0;
cursor: pointer;
}
.left-arrow {
left: 1%;
}
.right-arrow {
right: 1%;
}
.margin-start {}
<script src="https://use.fontawesome.com/releases/v5.0.6/js/all.js"></script>
<div class="scrollbar-container">
<div id="nav-margin" class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div class="result-container">
<img src="https://i.imgur.com/dA3tjxl.gif">
</div>
<div id="left-arrow" class="nav-button left-arrow">
<i class="fas fa-angle-left fa-3x"></i>
</div>
<div id="right-arrow" class="nav-button right-arrow">
<i class="fas fa-angle-right fa-3x"></i>
</div>
</div>

I'm not entirely sure if this would be the best response, but:
Point 1 - I don't think it matters here. A <button> is meant for a form, from a semantics point of view. For more context, read: https://css-tricks.com/use-button-element/
Point 2 - I can already scroll/swipe from left to right (in your code demo when I run the snippet), using my mouse/trackpad. So having extra buttons to do that job seems unnecessary. I would think rather to make a Javascript carousel (or slider) like effect when clicking the right button takes me to the next "slide", or the next chunk of your results. You could then disable buttons when there is no more content on the right (or left), or have them cycle back to the beginning. Effectively you want to think of a fixed width "slide" window (responsive for different viewports) and "slide" accordingly. Does that make sense for your problem?

Why my jQuery effect not performing like it state?

I have 3 questions about my jQuery study today.
Why my jQuery code not have the animation effect as it should be? for example, .slideUp() and .slideDown(), my code shows something strange instead of slideUp animation.
I understand, the .hide() or .slideUp() function is only to HIDE the div box, not DELETE them, however, in my code, why the position of other div boxes changed after a DIV .hide()? Shouldn't it stay at their original position as the DIV box is still there, just HIDED?
How can I achieve to let other DIVs stay at the original position, when one DIV box has been hided?
$(document).ready(function() {
$('#panel1').slideUp(1000).delay(1500).slideDown(1000);
});
.panel {
display: inline-block;
width: 80px;
height: 60px;
border: 1px solid green;
position: relative;
top: 20px;
margin-left: 45px;
border-radius: 5px;
}
.panelTop {
height: 30px;
background-color: blue;
color: white;
text-align: center;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<div class="panels">
<div id="panel1" class="panel">
<div class="panelTop">#panel1</div>
<div class="panelBottom">content</div>
</div>
<div id="panel2" class="panel">
<div class="panelTop">#panel2</div>
<div class="panelBottom">content</div>
</div>
<div id="panel3" class="panel">
<div class="panelTop">#panel3</div>
<div class="panelBottom">content</div>
</div>
<div id="panel4" class="panel">
<div class="panelTop">#panel4</div>
<div class="panelBottom">content</div>
</div>
</div>

For your first question
Why my jQuery code not have the animation effect as it should be? for
example, .slideUp() and .slideDown(), my code shows something strange
instead of slideUp animation.
The .slideUp() method animates the height of the matched elements. Means it animates height so it reaches 0 (or, if set, to whatever the CSS min-height property is). See here for reference. That is exactly what is happening to your first box it is decreasing in height.
Afterwards the display style property is set to none to ensure that the element no longer affects the layout of the page.
What display none does ?
display:none means that the tag in question will not appear on the
page at all
Now for second and third question
I understand, the .hide() or .slideUp() function is only to HIDE the
div box, not DELETE them, however, in my code, why the position of
other div boxes changed after a DIV .hide()? Shouldn't it stay at
their original position as the DIV box is still there, just HIDED?
How can I achieve to let other DIVs stay at the original position,
when one DIV box has been hided?
The .hide() and .slideUp()function they both add display:none to your tag element. Means they are gone now
Now what can you do to let them stay there, But hidden from view ?
You can use visibility or opacity property instead rather than using display
property.
For example: visibility: hidden; will just hide it from the view.
Will update your fiddle in order to demonstrate it in a while. Hope this will help you. Please feel free to ask if not clear. Thank you.
$(document).ready(function() {
setInterval(function(){
$('#panel1').slideUp(1000).delay(500).slideDown(1000);
}, 3000);
});
.outer-div
{
position: relative;
display: inline-block;
min-height: 1px;
margin-right: 15px;
margin-left: 15px;
width: 130px;
height: 90px;
}
.panel {
border: 1px solid green;
margin-left: 45px;
border-radius: 5px;
position:absolute;
top:0;
width: 100%;
}
.panelTop {
height: 30px;
background-color: blue;
color: white;
text-align: center;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<div class="panels">
<div class="outer-div">
<div id="panel1" class="panel">
<div class="panelTop">#panel1</div>
<div class="panelBottom">content</div>
</div>
</div>
<div class="outer-div">
<div id="panel2" class="panel">
<div class="panelTop">#panel2</div>
<div class="panelBottom">content</div>
</div>
</div>
<div class="outer-div">
<div id="panel3" class="panel">
<div class="panelTop">#panel3</div>
<div class="panelBottom">content</div>
</div>
</div>
<div class="outer-div">
<div id="panel4" class="panel">
<div class="panelTop">#panel4</div>
<div class="panelBottom">content</div>
</div>
</div>
</div>

You should use display:flex on .panels, that solves your first question.
For second question you should use visibility or opacity.
With current code you are removing it, although it is called hide() it is equivalent to CSS display:none; which doesn't keep space of element.
Although you actually don't need to set visibility in your case because sliding it up will hide element and down show.
Something like this:
$('#panel1').animate({
top: -62 // 60 is height of element plus 2px of borders
}, 1000).delay(1500).animate({
top: 0
}, 1000);
Also you have to change CSS a bit.
Add this to your CSS:
.panels {
display: flex;
overflow: hidden;
margin-top: 20px;
}
And from .panel remove top: 20px;
Full example is here https://jsfiddle.net/_jakob/cphptby3/1/

CSS behaving abnormally

So I am trying this for one day but I am still not able to do it. I have created a new index page for my website. I have copied code from my previous homepage.
If you see the sliders on the left(first homepage) and on the right(new homepage). You could see that on the new homepage the sliders are behaving abnormally. I can't figure out in my CSS why is this happening.
I have tried this:
<div id="testimonial">
<div id="black_title">
<h1>Bead X Testimonials</h1>
</div>
<div class="bx-wrapper" style="max-width: 100%;">
<div class="bx-viewport" style="width: 100%; overflow: hidden; position: relative; height: 232px;">
<ul class="slide_left" style="width: 415%; position: relative; -webkit-transition: 0s; transition: 0s; -webkit-transform: translate3d(-288px, 0px, 0px);">
<li style="float: left; list-style: none; position: relative; width: 248px;" class="bx-clone">
<iframe src="//player.vimeo.com/video/73331040" width="258" height="207" frameborder="0" webkitallowfullscreen="" mozallowfullscreen="" allowfullscreen=""></iframe> The Bead X Difference
</li>
<li style="float: left; list-style: none; position: relative; width: 248px;">
<img src="images/test_img.png"> The Bead X Difference
</li>
<li style="float: left; list-style: none; position: relative; width: 248px;">
<iframe src="//player.vimeo.com/video/73331040" width="258" height="207" frameborder="0" webkitallowfullscreen="" mozallowfullscreen="" allowfullscreen=""></iframe> The Bead X Difference
</li>
<li style="float: left; list-style: none; position: relative; width: 248px;" class="bx-clone">
<img src="images/test_img.png"> The Bead X Difference
</li>
</ul>
</div>
<div class="bx-controls bx-has-pager">
<div class="bx-pager bx-default-pager">
<div class="bx-pager-item">1
</div>
<div class="bx-pager-item">2
</div>
</div>
</div>
</div>
<div class="navigation">
<!-- <p><span id="left-prev"></span> <span id="left-next"></span></p> -->
<div id="left-prev">
<a class="bx-prev" href=""><img src="images/slider_prev.png" height="25" width="25"></a>
</div>
<div id="left-next">
<a class="bx-next" href=""><img src="images/slider_next.png" height="25" width="25"></a>
</div>
<div id="read_more"> View all
</div>
</div>
</div>
By abnormally I mean, that the text below the images in the slider is getting overflown and the controls of the slider are messed up.
But the result is still weird. How to resolve this?

Unfortunately there are quite a few issues going on here that you will have to deal with. First it looks like that "Wax Daddys Promise" pane is an image with at Width of 269px yet the column you are trying to align is 275px so it will not fill that area correctly to give you good lines.
The .testimonial class margins are all out of place.
#testimonial {
text-align: center;
width: 95%;
height: 310px;
background: white;
border: 4px solid rgb(209, 209, 209);
margin: 15px 2px 2px 17px;
}
You should use:
margin: 15px 0 0 0;
or better yet:
margin-top: 15px;
And that is just to give yourself a top buffer. If you give the same to each of the testimonial classes or just use class="testimonial" on all of those you'll get the top separation.
That should help a bit. In the future you may want to look into bootstrap, makes grid layout really easy without having to get deep with custom styling. Hope that helps.

You will still need to do a bit of formatting to clean up the layout, but this should help you resolve some of the issues:
Modified CSS:
#read_more { float: right; }
.bx-next, .bx-prev { padding: 0px; }
#left-next, #left-prev { float: left; }
.bx-pager { padding: 0px; position: relative; top: 0; }
Also, add a clear fix after your #read_more and after your .bx-controls DIVs:
<div style="clear: both;"></div>

Change multiple images/elements on hover for overlayed images HTML

I created a notecard image where i overlayed multiple images on top of it. These are elements of the notecard. I want it so that when I hover over the notecard, I can completely change the contents on the notecard image (overlaying new things onto the notecard).
So right now, I have this right now:
<div style="position:relative;">
<a href="#games">
<img id "image_a" a" src="images/card_normal.png" onmouseover "this.src rc 'images/hover/card_hover.png';" ;" onmouseout "this.src rc 'images/card_normal.png';" ;" style="position: absolute; top: 0; left: 0;"/>
<img id "image_b" b" src="images/category_icons/icon_games.png" style="position: absolute; top: 10px; left: 40px;"/>
<img id "image_c" c" src="images/category_titles/title_games.png" style="position: absolute; top: 160px; left: 40px;"/>
</a>
</div>
Where the notecard changes into a "hovered" version, but I am unable to change anything else. I want it so that whenever the mouse pointer is in the notecard (including if its on other elements inside the notecard), the contents change. I want to completely scrap the contents of it (so the title and icon) and change it so I can add text and overlay new images.
How can I do this in JS/HTML/etc?

If the two versions (hover/non-hover) are significantly different (and you want a no-js solution), you could have two divs, one set to hide, one set to show. Then on-hover, you change their visibility. Fiddle.
<div class="card">
<div class="no-hover">
stuff you want to show when the user is just looking
</div>
<div class="on-hover">
stuff you want to show when the user hovers
</div>
</div>
CSS:
.no-hover {
display: block;
}
.on-hover {
display: none;
}
.card:hover > .on-hover {
display: block;
}
.card:hover > .no-hover {
display: none;
}
It's extra HTML elements, but might be easier to maintain.

Based on your comment to Learner's answer, here is an example of the idea you are describing:
HTML:
<div class="outer">
<div class="inner"></div>
<div class="inner"></div>
<div class="inner"></div>
<div class="inner"></div>
</div>
CSS:
.outer {
width: 304px;
height: 304px;
background-color: black;
}
.inner {
float: left;
width: 150px;
height: 150px;
background-color: red;
border: 1px solid black;
display: none;
}
.outer:hover .inner {
display: block;
}
DEMO

If you are trying to achieve something like this:
http://spoonfedproject.com/wp-content/uploads/demo/jquery-slide-hover/index.htm
Here's your solution:
http://www.robertkuzma.com/2011/01/jquery-animated-swap-div-content-on-hover-effect/