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Child div background-color does not fit parent div when zooming

Depending on the zoom-level of the browser, the background color of the child div has a strange behavior. Some white spaces appears.
See these examples:
Zoom 125%:
Zoom 150%:
Zoom 175%:
Zoom 200%:
Here is my code:
(JSFiddle: https://jsfiddle.net/3L4wfvyg/)
$(document).ready(function () {
document.getElementById("HeaderContainer").addEventListener("click", function (e) {
if (e.target.id != "FormContainer") {
document.getElementById("Container3").classList.toggle("clicked");
document.getElementById("HeaderContainer").classList.toggle("HeaderContainer3");
};
});
});
.Container1 {
background-color: white;
line-height: 30px;
font-size: 20px;
color: black;
border: none;
position: absolute;
}
.Container1 h3 {
font-size: 30px;
color: #142D41;
margin-top: 20px;
margin-bottom: 10px;
position: relative;
}
.Container1 .Container3 {
padding: 30px;
display: block;
border: 1px solid black;
border-radius: 5px;
margin-top: 15px;
font-size: 15px;
min-width: 100%;
background-color: white;
text-align: left;
height: 100px;
overflow: hidden;
}
.Container1 .Container3:hover {
text-decoration: none !important;
cursor: pointer;
}
.HeaderContainer3:hover {
color: white !important;
background-color: blue;
}
.HeaderContainer2 {
padding: 30px;
}
.HeaderContainer1 {
z-index: 10;
position: relative;
margin: -31px;
padding: 32px 30px 25px 30px;
width: auto;
}
.FormContainer {
font-size: 20px !important;
}
#Container3 {
height: 0px;
transition: height 300ms ease-in-out;
box-shadow: 0.1px 0.6px 2px 0px #8c8c8c;
}
#Container3.clicked {
height: 314px;
}
.Header {
position: relative;
padding-top: 6px;
overflow: hidden;
width: 100%;
height: 100%;
cursor: auto;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<div id="Container1" class="Container1">
<h3>Title
</h3>
<div class="Container2">
<div id="Container3" class="Container3">
<div id="HeaderContainer" class="HeaderContainer1 HeaderContainer2 HeaderContainer3">
<div class="Header">Header</div>
</div>
<div id="FormContainer" class="FormContainer">
<hr />
<div style="padding: 5px 0px 8px 0px;">
Form
</div>
<br />
<div id="FormElementsContainer" class="FormElementsContainer">
<div>
<b>First</b>
<br />
</div>
<div>
<b>Last</b>
<br />
</div>
<div>
<b>Third</b>
<br />
</div>
<div>
<br />
<button>
Submit
</button>
</div>
</div>
<br />
</div>
</div>
</div>
</div>
Why is this happening and how can I solve the problem?
When i remove the border from Container3 it seems like the problem does not occur anymore, but I do not know if this is because it gets hard to see if the problem is still there due to the white color.

There can be a sort of edge effect on zoom brought about by one CSS pixel not being just one screen pixel but 2 or more on high def/modern screens. If the system is trying to map several screen pixels to one CSS one and is asked to do a fraction it can sometimes 'leave behind' a screen pixel. Hence the white on occasion, and the variation at different zoom levels.
In the case in the question maybe doing a simple hack, making the parent element have background blue on hover, would be sufficient?
.Container1 .Container3:hover {
text-decoration: none !important;
cursor: pointer;
background-color: blue;
}

Inspired by A Haworth's answer: coloring the parent element instead is indeed less prone to rendering artifacts when dealing with different zoomlevels/screen densities. You could remove the background from the child element, and add a new :hover selector for the parent that only activates when it is not in the .clicked state.
.HeaderContainer3:hover {
color: white !important;
/** Background removed here **/
}
/** New block with a :not selector **/
.Container1 .Container3:hover:not(.clicked) {
background-color: blue;
}
Full working code example:
$(document).ready(function () {
document.getElementById("HeaderContainer").addEventListener("click", function (e) {
if (e.target.id != "FormContainer") {
document.getElementById("Container3").classList.toggle("clicked");
document.getElementById("HeaderContainer").classList.toggle("HeaderContainer3");
};
});
});
.Container1 {
background-color: white;
line-height: 30px;
font-size: 20px;
color: black;
border: none;
position: absolute;
}
.Container1 h3 {
font-size: 30px;
color: #142D41;
margin-top: 20px;
margin-bottom: 10px;
position: relative;
}
.Container1 .Container3 {
padding: 30px;
display: block;
border: 1px solid black;
border-radius: 5px;
margin-top: 15px;
font-size: 15px;
min-width: 100%;
background-color: white;
text-align: left;
height: 100px;
overflow: hidden;
}
.Container1 .Container3:hover {
text-decoration: none !important;
cursor: pointer;
}
.Container1 .Container3:hover:not(.clicked) {
background-color: blue;
}
.HeaderContainer3:hover {
color: white !important;
}
.HeaderContainer2 {
padding: 30px;
}
.HeaderContainer1 {
z-index: 10;
position: relative;
margin: -31px;
padding: 32px 30px 25px 30px;
width: auto;
}
.FormContainer {
font-size: 20px !important;
}
#Container3 {
height: 0px;
transition: height 300ms ease-in-out;
box-shadow: 0.1px 0.6px 2px 0px #8c8c8c;
}
#Container3.clicked {
height: 314px;
}
.Header {
position: relative;
padding-top: 6px;
overflow: hidden;
width: 100%;
height: 100%;
cursor: auto;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<div id="Container1" class="Container1">
<h3>Title
</h3>
<div class="Container2">
<div id="Container3" class="Container3">
<div id="HeaderContainer" class="HeaderContainer1 HeaderContainer2 HeaderContainer3">
<div class="Header">Header</div>
</div>
<div id="FormContainer" class="FormContainer">
<hr />
<div style="padding: 5px 0px 8px 0px;">
Form
</div>
<br />
<div id="FormElementsContainer" class="FormElementsContainer">
<div>
<b>First</b>
<br />
</div>
<div>
<b>Last</b>
<br />
</div>
<div>
<b>Third</b>
<br />
</div>
<div>
<br />
<button>
Submit
</button>
</div>
</div>
<br />
</div>
</div>
</div>
</div>

Here's a fix. It's similar to what someone else suggested, but takes into account the .clicked state.
Fix boils down to setting the background-color property on the container with border and border-radius properties instead of on the nested container. It achieves this by replacing .HeaderContainer3:hover selector with .Container3:not(.clicked):hover.
.Container3:not(.clicked):hover {
color: white !important;
background-color: blue;
}
Working fiddle: https://jsfiddle.net/2eqLb6go/
As for why this happens, I don't have a technical answer, but it does appear to have something to do with fractional pixel rendering with nested containers when parent has a border. Here's a demonstration of the same problem in a simplified form:
https://jsfiddle.net/0vje6k5w/
It seems like a rendering issue due to a rounding error with border. It appears that the clipping area and the border widths are calculated differently resulting in an inconsistent gap of transparent pixels which can be rounded to either 0 or 1. The background of the container with the border property is respected (hence the above-described fix), but anything nested inside of it will be clipped, and there doesn't appear to be any way to stop that from happening. E.g. the problem persists even if the child elements are absolutely positioned inside of it.
Honestly, I'd call this a buggy implementation of the box-model with regard to page zoom. It's odd that all major browsers in 2021 suffer from the same behavior.

I changed border size to 0.0125em. (It's weird but worked!).
.Container1 .Container3 {
border: 0.0125em solid black;
}

How to prepend a li to the top of another li

I am creating a list of elements from user inputs. Each element in this list comes with a dynamically created button within my JavaScript.
I am trying to have it so that when I click on this dynamically created button ("started"), it will automatically remove the entire list element from the original li and move it to the top of another li.
My code: [EDIT: For some reason, my code snippet doesn't show the second list "doing" but it shows in my local console, not sure if it's problem with my code?]
// Dynamically creates a new li element with 'started' button after user puts in text and clicks a button similar to 'submit'
$(document).ready(
$("#new-item").on('click', function() {
// once the document loads, create new item with this function
var text = $('#task').val();
if (text != '') {
$('#todo-list').prepend("<li class='addedTask'> <button id='started'>Started</button>" + text + '</li>' + '</br>');
}
})
);
$(".addedTask").on('click', "button", function() {
var completedItem = $(this).parent();
$('#doing-list').append($('#todo-list'( completedItem)).removeClass(completedItem));
});
header {
background-color: #026aa7;
height: 30px;
text-align: center;
padding: 5px 8px;
}
header a {
height: 30px;
width: 80px;
text-align: center;
background-image: url(https://a.trellocdn.com/dist/images/header-logo-2x.01ef898811a879595cea.png);
background-repeat: no-repeat;
text-align: center;
display: inline-block;
background-size: 80px 30px;
}
body {
background-color: #0078c0;
margin: 0px;
font-family: sans-serif;
}
li {
list-style-type: none;
margin-left: 8px;
text-indent: 10px;
/* cursor: pointer;*/
}
li:hover {
background: #ddd;
}
li.addedTask {
border: 1px solid white;
border-radius: 4px;
padding: 15px;
width: 83%;
background-color: white;
}
#started {
float: left;
background-color: white;
border-radius: 6px;
}
.column {
background-color: #E3E3E3;
min-height: 100px;
width: 25%;
box-shadow: 1px 1px 3px $shadow;
display: inline-block;
position: asolute;
margin: 5px;
vertical-align: top;
position: relative;
top: 75px;
right: 287px;
border-radius: 5px;
}
.column h1 {
font-size: 20px;
padding-left: 10px;
position: relative;
bottom: .5px;
color: #393939;
margin: 5px;
}
#new-item {
position: relative;
left: 40px;
top: 20px;
font-family: sans-serif;
padding: 4px;
width: 100px;
background-color: #ffffff;
border-radius: 4px;
}
#task {
position: relative;
left: 25px;
top: 20px;
height: 20px;
width: 200px;
padding: 10px;
border-radius: 4px;
padding-left: 4px;
}
<html>
<head>
<title> HW03 Javascript and jQuery </title>
<link rel="stylesheet" href="_css/style.css">
</head>
<body>
<header>
</header>
<section>
<!-- create input tag for user input -->
<input type="text" id="task">
<!-- button takes input and adds a new element with content to 'list_do' -->
<button id="new-item"> Add a card </button>
<!-- ability to move items between list_todo and list_doing -->
<div class="column" id="to-do">
<h1> To Do </h1>
<li id="todo-list"></li>
</div>
<div class="column" id="doing">
<h1> Doing </h1>
<li id="doing-list"></li>
</div>
</section>
<script type="text/javascript" src="https://code.jquery.com/jquery-2.1.1.min.js"></script>
<script type="text/javascript" src="_js/main.js">
</script>
</body>
</html>
Here is an image of what it looks like on my end:

You're using the wrong selector .addedTask for the Event delegation.
Use prepend function to add the element at the top.
To test this snippet, click on Full Page after you click 'Run code snippet'
// Dynamically creates a new li element with 'started' button after user puts in text and clicks a button similar to 'submit'
$(document).ready(
$("#new-item").on('click', function() {
// once the document loads, create new item with this function
var text = $('#task').val();
if (text != '') {
$('#todo-list').prepend("<li class='addedTask'> <button id='started'>Started</button>" + text + '</li>' + '</br>');
}
})
);
$("#todo-list").on('click', "button", function() {
var completedItem = $(this).parent();
$('#doing-list').prepend($(completedItem));
});
header {
background-color: #026aa7;
height: 30px;
text-align: center;
padding: 5px 8px;
}
header a {
height: 30px;
width: 80px;
text-align: center;
background-image: url(https://a.trellocdn.com/dist/images/header-logo-2x.01ef898811a879595cea.png);
background-repeat: no-repeat;
text-align: center;
display: inline-block;
background-size: 80px 30px;
}
body {
background-color: #0078c0;
margin: 0px;
font-family: sans-serif;
}
li {
list-style-type: none;
margin-left: 8px;
text-indent: 10px;
/* cursor: pointer;*/
}
li:hover {
background: #ddd;
}
li.addedTask {
border: 1px solid white;
border-radius: 4px;
padding: 15px;
width: 83%;
background-color: white;
}
#started {
float: left;
background-color: white;
border-radius: 6px;
}
.column {
background-color: #E3E3E3;
min-height: 100px;
width: 25%;
box-shadow: 1px 1px 3px $shadow;
display: inline-block;
position: asolute;
margin: 5px;
vertical-align: top;
position: relative;
top: 75px;
right: 287px;
border-radius: 5px;
}
.column h1 {
font-size: 20px;
padding-left: 10px;
position: relative;
bottom: .5px;
color: #393939;
margin: 5px;
}
#new-item {
position: relative;
left: 40px;
top: 20px;
font-family: sans-serif;
padding: 4px;
width: 100px;
background-color: #ffffff;
border-radius: 4px;
}
#task {
position: relative;
left: 25px;
top: 20px;
height: 20px;
width: 200px;
padding: 10px;
border-radius: 4px;
padding-left: 4px;
}
<html>
<head>
<title> HW03 Javascript and jQuery </title>
<link rel="stylesheet" href="_css/style.css">
</head>
<body>
<header>
</header>
<section>
<!-- create input tag for user input -->
<input type="text" id="task">
<!-- button takes input and adds a new element with content to 'list_do' -->
<button id="new-item"> Add a card </button>
<!-- ability to move items between list_todo and list_doing -->
<div class="column" id="to-do">
<h1> To Do </h1>
<li id="todo-list"></li>
</div>
<div class="column" id="doing">
<h1> Doing </h1>
<li id="doing-list"></li>
</div>
</section>
<script type="text/javascript" src="https://code.jquery.com/jquery-2.1.1.min.js"></script>
<script type="text/javascript" src="_js/main.js">
</script>
</body>
</html>

Since you are adding HTML to the DOM later, the code $(".addedTask").on('click', "button", function() { will not work because at the time of execution this code there was no .addedTask elements.
You may instead want to delegate this to a higher node in the DOM. One easy way to accomplish this would be to rewrite this as
$("document").on('click', ".addedTask button", function() {

How to fix an element to the right of div?

I have a button which i want to fix it's position to the right of a div, the button is toggling the visibility of it's left div, problem is the button loses it's position once the resolution is changing...
Here is an Example
And here is what I've done so far:
$('.results_toggle').on('click', function() {
$(this).toggleClass('left_hide');
$('.left').toggle();
});
.cont {
width: 100vw;
}
.left {
position: relative;
width: 50vw;
height: 100vh;
background-color: grey;
float: left;
border-left: 2px solid white;
}
.right {
height: 100vh;
width: 50vw;
float: left;
}
.results_toggle:before {
content: "\f054";
font-family: FontAwesome;
font-style: normal;
font-weight: normal;
text-decoration: inherit;
color: black;
font-size: 24px;
padding-right: 0.5em;
position: absolute;
top: 14px;
left: 5px;
}
.results_toggle {
background-color: grey;
height: 60px;
width: 30px;
position: absolute;
z-index: 106;
top: 45vh;
right: 223px;
border-bottom-right-radius: 110px;
border-top-right-radius: 110px;
border-bottom: 0;
}
.left_hide {
left: 0px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="cont">
<div class="left">
</div>
<div class="results_toggle">
<!-- the button -->
</div>
<div class="right">
</div>
</div>

The simplest solution to this would be to put the toggle within the .right div, and position it at left: 0 so that it is always adjacent to the .left div, something like this:
<div class="cont">
<div class="left"></div>
<div class="right">
<div class="results_toggle"></div>
</div>
</div>
.right {
position: relative; /* add this */
}
.results_toggle {
/* remove 'right' */
left: 0; /* add this */
}
Working example
The advantage of this method is that it will be completely unaffected by any change in screen resolution.

You use viewport units , so the values of them will change when changing the viewport size ( resolution ) .
If you want the arrow to stay in the middle ( and so, on the right side of the grey div ) , you should center it this way
See snippet below
$('.results_toggle').on('click', function() {
$(this).toggleClass('left_hide');
$('.left').toggle();
});
.cont {
width: 100vw;
}
.left {
position: relative;
width: 50vw;
height: 100vh;
background-color: grey;
float: left;
border-left:2px solid white;
}
.right {
height: 100vh;
width: 50vw;
float: left;
}
.results_toggle:before {
content: "\f054";
font-family: FontAwesome;
font-style: normal;
font-weight: normal;
text-decoration: inherit;
color: black;
font-size: 24px;
padding-right: 0.5em;
position: absolute;
top: 14px;
left: 5px;
}
.results_toggle {
background-color: grey;
height: 60px;
width: 30px;
position: absolute;
z-index: 106;
top: 50%;
right:50%;
transform:translate(100%,-50%);
border-bottom-right-radius: 110px;
border-top-right-radius: 110px;
border-bottom: 0;
}
.left_hide{
left:0px;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="cont">
<div class="left">
</div>
<div class="results_toggle">
</div>
<div class="right">
</div>
</div>

For me the best approach to align elements is to use Flexbox attributes. With those attributes, you can place element as boxes in a row, column...In your case you have a main box .cont with a left side and a right side. This is the result with a Flexbox placement :
The main div is represented by the red background. Inside you have your left div and aligned with your right button.
Here is the code to make this :
<html>
<head>
<meta charset='utf-8' />
<style type="text/css">
.cont
{
display: flex;
align-items: center;
background-color: red;
color: white;
}
.left
{
background-color: blue;
margin: 5px;
}
button
{
background-color: green;
}
</style>
</head>
<body>
<div class="cont">
<div class="left">
<p>Left div</p>
</div>
<div class="results_toggle">
<button>Right button</button>
</div>
<div class="right"></div>
</div>
</body>
</html>

not sure if that's what you meant, but i simply changed the leftattribute of the button to 50vw, the same as your grey box.
Here's a fiddle
edit:
another option: position: relative and float: left without left or right property
updated fiddle

It's because you've fixed each property.
You can fix an element at the right of his parent using absolute and relative position. And add the width of you child.
Example
.parent{
width:200px;
height:200px;
background-color:#ccc;
position:relative;
}
.child{
position:absolute;
right:0;
top:100px;
transform:translateX(100%) translateY(-50%);
}
<div class="parent">
<button class="child">btn</button>
</div>

Make multiple iframes drag, resize and minimize like a regular window

I'm working on a Dashboard for work where I have multiple iframes open on one web page, each iframe having a different site. I have been able to get the div's holding the iframes to resize and drag, but I cant for the life of me get it to minimize when I press the top left image. Here's what I have so far:
// JavaScript Document
$(function () {"use strict";
$("#framewrap") .resizable() .draggable();
});
.body_padding {
padding: 16px;
}
#framewrap {
padding-right: 10px;
padding-left: 10px;
padding-bottom: 28px;
background-color: #277099;
width: 512px;
height: 90px;
-webkit-box-shadow: 2px 2px 16px -2px;
box-shadow: 2px 2px 16px -2px;
border-radius: 12px;
position: absolute;
}
#frame {
width: 100%;
height: 100%;
background-color: #fff;
}
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<link href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<body>
<div>
<div id="framewrap">
<span style="color: #FFFFFF; font-size: small; font-style: normal; font-weight: 100;">Window 1</span>
<img src="http://findicons.com/files/icons/2711/free_icons_for_windows8_metro/128/minimize_window.png" alt="" width="18" height="18" align="right"/>
<iframe id="frame" src=""></iframe>
</div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script>window.jQuery || document.write('<script src="js/vendor/jquery-1.9.1.min.js"><\/script>')</script>
<script src="js/main.js"></script
</body>
The idea is that I can press the minimize button on the right, and it changes the height and width of the wrapper div to a height of 90px and a width of 256px. I'd need to have multiple iframes open at once in one page that can individually move, resize, and minimize as needed. Any help is appreciated Thanks!!

To extend this a bit for multiple windows, I switched a few of your ID based elements to class based elements. You also had jQuery included a few times and I simplified that.
I think this should get you going. It is basically a simple toggle of a minimize class on your container.
// JavaScript Document
$(function() {
"use strict";
$(".framewrap").resizable().draggable();
$(".framewrap .actionIcon").on("click", function() {
$(this).closest(".framewrap").toggleClass("min");
});
});
.body_padding {
padding: 16px;
}
.framewrap {
padding-right: 10px;
padding-left: 10px;
padding-bottom: 28px;
background-color: #277099;
width: 512px;
height: 90px;
-webkit-box-shadow: 2px 2px 16px -2px;
box-shadow: 2px 2px 16px -2px;
border-radius: 12px;
position: absolute;
}
.framewrap span {
color: #FFFFFF;
font-size: small;
font-style: normal;
font-weight: 100;
}
.framewrap .actionIcon {
display: inline-block;
float: right;
height: 18px;
width: 18px;
background-image: url(http://findicons.com/files/icons/2711/free_icons_for_windows8_metro/128/minimize_window.png);
background-size: cover;
background-position: center center;
}
.framewrap.min {
height: 90px !important;
width: 256px !important;
}
.framewrap.min .actionIcon {
background-image: url(http://findicons.com/files/icons/2711/free_icons_for_windows8_metro/128/maximize_window.png);
}
.frame {
width: 100%;
height: 100%;
background-color: #fff;
}
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
<div>
<div class="framewrap">
<span>Window 1</span>
<span class="actionIcon"></span>
<iframe class="frame" src=""></iframe>
</div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>

CSS - Formatting a Navigation div beside multiple divs

I designed my site so that a navigation bar spans down the whole site. It is handled in a div. The rest of the site is inside divs as well, and will be placed beside the navigation div.
After placing the first div beside the navigation div, everything worked out. When I tried to add a second div beside the navigation div and under the first div, it goes outside of the body. I can I fix this?
THE ORANGE BORDER DIV IS THE ONE I AM TRYING TO FIX
Here is my site
: JSFiddle would be to large and hard to understand, so please use the console in your browser to help me out.
firstBox is the div that isn't working how I want it to. #navigationPane and #topBox are in the right position
<html>
<head>
<title>Test</title>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/stellar.js/0.6.2/jquery.stellar.min.js"></script>
<script type="text/javascript">
$(document).ready(function (){
function dBug(data) {
console.log(data);
}
dBug("document ready");
$.stellar();
});
</script>
<style type="text/css">
body {
margin-top: 0px;
margin-bottom: 0px;
margin-top: 20px;
margin-bottom: 20px;
width: 1000px;
min-height: 800px;
max-height: 1200px;
margin-left: auto;
margin-right: auto;
font-family: Verdana,Helvetica,Arial,sans-serif;
border: solid green 1px;
}
h1 {
text-align: center;
margin-top: 10px;
color: white;
margin-top: 20px;
}
p {
color: white;
text-align: center;
}
#small {
font-style: italic;
font-size: 10px;
margin-top: -12px;
}
#topBox {
height: 400px;
width: 929px;
border: solid blue 1px;
float: right;
margin-top: -1px;
margin-right: -1px;
background-image: url(image.jpg);
background-size: 1400px 600px;
background-position: -0% 60%;
cursor: default;
}
#firstBox {
height: 400px;
width: 928px;
border: solid orange 1px;
float: right;
cursor: default;
}
#navigationPane {
width: 70px;
margin-left: -1px;
border: solid red 1px;
min-height: 1200px;
max-height: 2000px;
margin-bottom: -1px;
margin-top: -1px;
background-color: purple;
}
#box {
width: 500px;
height: 150px;
border: dotted white 2px;
clear: none;
background-color: rgba(0, 0, 0, 0.85);
margin-left: 200px;
margin-top: 120px;
-webkit-border-radius: 10px;
border-radius: 10px;
}
#navigationPane img {
margin-left: 5px;
margin-top: 10px;
}
a:hover {
opacity: 0.8;
}
</style>
</head>
<body>
<div id="topBox" data-stellar-background-ratio="0.2">
<div id="box" >
<h1>WH Programming</h1>
<p>Will Houle Programming - Student Developer</p>
<p id="small">A site created to host tutorials, past lab assignments, and future endeavors.</p>
</div>
</div>
<div id="navigationPane">
<img src="twitter.png" />
<img src="humber.png" />
</div>
<div id="firstBox">
</div>
</body>
</html>
I know the coding is very unorganized, but for now this is what im working with

Have you tried to add some css property which is useful for you?
however, let me tell you. you should use position and top property for the box which is going out of thr body.
here is that code:
<div id="firstBox" style="
position: relative;
top: -800;"></div>
or
in your #firstdiv of css stylesheet add these two:
position: relative;
top: -800;