Does a child div inherit parent's height? - css

Question

As far as I know, child divs normally inherit parent's style. However this isn't the case when I am trying to copy the parent's height. Any clarification on how this works would be very appreciated
Parent Div
Child Div
I've tried switching to position:relative and display:inline but am yet to find anything that modifies the child div's height relative to the parent.
// Plot our graphs
var data = [
{
z: [[1, 20, 30], [20, 1, 60], [30, 60, 1]],
type: 'heatmap'
}
];
Plotly.newPlot('chart_div', data);
/*//////////////////////////////////////////////////////////////////
[ FONT ]*/
#font-face {
font-family: Ubuntu-Regular;
src: url('../fonts/ubuntu_regular-webfont.woff') format('woff');
}
#font-face {
font-family: Ubuntu-Bold;
src: url('../fonts/ubuntu-bold-webfont.woff') format('woff');
}
#font-face {
font-family: Montserrat-Regular;
src: url('../fonts/montserrat-regular-webfont.woff') format('woff');
}
#font-face {
font-family: FontAwesome;
src: url('../fonts/fontawesome-webfont.woff') format('woff');
}
#font-face {
font-family: Material-Design-Iconic-Font;
src: url('../fonts/Material-Design-Iconic-Font.woff') format('woff');
}
fontawesome-webfont.woff
/*//////////////////////////////////////////////////////////////////
[ RESTYLE TAG ]*/
* {
margin: 0px;
padding: 0px;
box-sizing: border-box;
}
body, html {
height: 100%;
font-family: Ubuntu-Regular, sans-serif;
}
/*---------------------------------------------*/
a {
font-family: Ubuntu-Regular;
font-size: 14px;
line-height: 1.7;
color: #666666;
margin: 0px;
transition: all 0.4s;
-webkit-transition: all 0.4s;
-o-transition: all 0.4s;
-moz-transition: all 0.4s;
}
a:focus {
outline: none !important;
}
a:hover {
text-decoration: none;
color: #403866;
}
/*---------------------------------------------*/
h1,h2,h3,h4,h5,h6 {
margin: 0px;
}
p {
font-family: Ubuntu-Regular;
font-size: 14px;
line-height: 1.7;
color: #666666;
margin: 0px;
}
ul, li {
margin: 0px;
list-style-type: none;
}
/*---------------------------------------------*/
input {
outline: none;
border: none;
}
textarea {
outline: none;
border: none;
}
textarea:focus, input:focus {
border-color: transparent !important;
}
input::-webkit-input-placeholder { color: #8f8fa1;}
input:-moz-placeholder { color: #8f8fa1;}
input::-moz-placeholder { color: #8f8fa1;}
input:-ms-input-placeholder { color: #8f8fa1;}
textarea::-webkit-input-placeholder { color: #8f8fa1;}
textarea:-moz-placeholder { color: #8f8fa1;}
textarea::-moz-placeholder { color: #8f8fa1;}
textarea:-ms-input-placeholder { color: #8f8fa1;}
label {
display: block;
margin: 0;
}
/*---------------------------------------------*/
button {
outline: none !important;
border: none;
background: transparent;
}
button:hover {
cursor: pointer;
}
iframe {
border: none !important;
}
/*//////////////////////////////////////////////////////////////////
[ Utility ]*/
.txt1 {
font-family: Ubuntu-Regular;
font-size: 16px;
color: #827ffe;
line-height: 1.4;
}
.app-explanation {
font-family: Ubuntu-Regular;
font-size: 13px;
color: #403866;
line-height: 1.4;
text-align: center;
font-style: italic;
width: 100%;
}
/*//////////////////////////////////////////////////////////////////
[ login ]*/
.limiter {
width: 100%;
margin: 0 auto;
}
.container-login100 {
width: 100%;
display: -webkit-box;
display: -webkit-flex;
display: -moz-box;
display: -ms-flexbox;
display: flex;
flex-wrap: wrap;
justify-content: center;
align-items: center;
padding: 15px;
position: relative;
background-position: center;
background-size: cover;
background-repeat: no-repeat;;
}
.wrap-login100 {
width: 390px;;
background: #fff;
border-radius: 10px;
position: relative;
}
.wrap-data100 {
width: 90%;
background: #fff;
border-radius: 10px;
position: relative;
}
/*==================================================================
[ Form ]*/
.login100-form {
width: 100%;
}
.login100-form-title {
font-family: Ubuntu-Bold;
font-size: 30px;
color: #403866;
line-height: 1.2;
text-transform: uppercase;
text-align: center;
width: 100%;
display: block;
}
/*------------------------------------------------------------------
[ Input ]*/
.wrap-input100 {
width: 100%;
position: relative;
background-color: #e6e6e6;
border: 1px solid transparent;
border-radius: 3px;
}
/*---------------------------------------------*/
.input100 {
font-family: Ubuntu-Bold;
color: #403866;
line-height: 1.2;
font-size: 18px;
display: block;
width: 100%;
background: transparent;
height: 62px;
padding: 0 20px 0 38px;
}
/*------------------------------------------------------------------
[ Focus Input ]*/
.focus-input100 {
position: absolute;
display: block;
width: calc(100% + 2px);
height: calc(100% + 2px);
top: -1px;
left: -1px;
pointer-events: none;
border: 1px solid #827ffe;
border-radius: 3px;
visibility: hidden;
opacity: 0;
-webkit-transition: all 0.4s;
-o-transition: all 0.4s;
-moz-transition: all 0.4s;
transition: all 0.4s;
-webkit-transform: scaleX(1.1) scaleY(1.3);
-moz-transform: scaleX(1.1) scaleY(1.3);
-ms-transform: scaleX(1.1) scaleY(1.3);
-o-transform: scaleX(1.1) scaleY(1.3);
transform: scaleX(1.1) scaleY(1.3);
}
.input100:focus + .focus-input100 {
visibility: visible;
opacity: 1;
-webkit-transform: scale(1);
-moz-transform: scale(1);
-ms-transform: scale(1);
-o-transform: scale(1);
transform: scale(1);
}
.eff-focus-selection {
visibility: visible;
opacity: 1;
-webkit-transform: scale(1);
-moz-transform: scale(1);
-ms-transform: scale(1);
-o-transform: scale(1);
transform: scale(1);
}
/*==================================================================
[ Restyle Checkbox ]*/
.input-checkbox100 {
display: none;
}
.label-checkbox100 {
font-family: Ubuntu-Regular;
font-size: 16px;
color: #999999;
line-height: 1.2;
display: block;
position: relative;
padding-left: 26px;
cursor: pointer;
}
.label-checkbox100::before {
content: "\f00c";
font-family: FontAwesome;
font-size: 13px;
color: transparent;
display: -webkit-box;
display: -webkit-flex;
display: -moz-box;
display: -ms-flexbox;
display: flex;
justify-content: center;
align-items: center;
position: absolute;
width: 18px;
height: 18px;
border-radius: 3px;
background: #fff;
border: 2px solid #827ffe;
left: 0;
top: 50%;
-webkit-transform: translateY(-50%);
-moz-transform: translateY(-50%);
-ms-transform: translateY(-50%);
-o-transform: translateY(-50%);
transform: translateY(-50%);
}
.input-checkbox100:checked + .label-checkbox100::before {
color: #827ffe;
}
/*------------------------------------------------------------------
[ Button ]*/
.container-login100-form-btn {
width: 100%;
display: -webkit-box;
display: -webkit-flex;
display: -moz-box;
display: -ms-flexbox;
display: flex;
flex-wrap: wrap;
}
.login100-form-btn {
font-family: Ubuntu-Bold;
font-size: 16px;
color: #fff;
line-height: 1.2;
text-transform: uppercase;
display: -webkit-box;
display: -webkit-flex;
display: -moz-box;
display: -ms-flexbox;
display: flex;
justify-content: center;
align-items: center;
padding: 0 20px;
width: 100%;
height: 62px;
background-color: #827ffe;
border-radius: 3px;
-webkit-transition: all 0.4s;
-o-transition: all 0.4s;
-moz-transition: all 0.4s;
transition: all 0.4s;
}
.login100-form-btn:hover {
background-color: #403866;
}
/*------------------------------------------------------------------
[ Alert validate ]*/
.validate-input {
position: relative;
}
.alert-validate::before {
content: attr(data-validate);
position: absolute;
max-width: 70%;
background-color: #fff;
border: 1px solid #c80000;
border-radius: 3px;
padding: 4px 25px 5px 10px;
top: 50%;
-webkit-transform: translateY(-50%);
-moz-transform: translateY(-50%);
-ms-transform: translateY(-50%);
-o-transform: translateY(-50%);
transform: translateY(-50%);
right: 12px;
pointer-events: none;
font-family: Ubuntu-Regular;
color: #c80000;
font-size: 14px;
line-height: 1.4;
text-align: left;
visibility: hidden;
opacity: 0;
-webkit-transition: opacity 0.4s;
-o-transition: opacity 0.4s;
-moz-transition: opacity 0.4s;
transition: opacity 0.4s;
}
.alert-validate::after {
content: "\f12a";
font-family: FontAwesome;
display: block;
position: absolute;
color: #c80000;
font-size: 18px;
top: 50%;
-webkit-transform: translateY(-50%);
-moz-transform: translateY(-50%);
-ms-transform: translateY(-50%);
-o-transform: translateY(-50%);
transform: translateY(-50%);
right: 18px;
}
.alert-validate:hover:before {
visibility: visible;
opacity: 1;
}
#media (max-width: 992px) {
.alert-validate::before {
visibility: visible;
opacity: 1;
}
}
/*==================================================================
[ Restyle Select2 ]*/
.select2-container {
display: block;
max-width: 100% !important;
width: auto !important;
}
.select2-container .select2-selection--single {
display: -webkit-box;
display: -webkit-flex;
display: -moz-box;
display: -ms-flexbox;
display: flex;
align-items: center;
background-color: rgba(171, 171, 189, 0.233);
border: none;
height: 40px;
outline: none;
position: relative;
left: -40px;
}
/*------------------------------------------------------------------
[ in select ]*/
.select2-container .select2-selection--single .select2-selection__rendered {
font-family: Ubuntu-Bold;
font-size: 18px;
color: #555555;
line-height: 1.2;
padding-left: 0px ;
background-color: transparent;
}
.select2-container--default .select2-selection--single .select2-selection__arrow {
height: 100%;
top: 50%;
transform: translateY(-50%);
right: 0px;
display: -webkit-box;
display: -webkit-flex;
display: -moz-box;
display: -ms-flexbox;
display: flex;
align-items: center;
justify-content: flex-end;
}
.select2-selection__arrow b {
display: none;
font-family: Material-Design-Iconic-Font !important;
font-size: 18px;
color: #555555;
}
.select2-selection__arrow {
content: '\f312';
font-family: Material-Design-Iconic-Font !important;
font-size: 18px;
color: #555555;
}
/*------------------------------------------------------------------
[ Dropdown option ]*/
.select2-container--open .select2-dropdown {
z-index: 1251;
width: calc(100% + 2px);
border: 0px solid transparent;
border-radius: 10px;
overflow: hidden;
background-color: rgba(171, 171, 189, 0.233);
left: -40px;
box-shadow: 0 3px 10px 0px rgba(0, 0, 0, 0.2);
-moz-box-shadow: 0 3px 10px 0px rgba(0, 0, 0, 0.2);
-webkit-box-shadow: 0 3px 10px 0px rgba(0, 0, 0, 0.2);
-o-box-shadow: 0 3px 10px 0px rgba(0, 0, 0, 0.2);
-ms-box-shadow: 0 3px 10px 0px rgba(0, 0, 0, 0.2);
}
#media (max-width: 576px) {
.select2-container--open .select2-dropdown {
left: -12px;
}
}
.select2-dropdown--above {top: -38px;}
.select2-dropdown--below {top: 10px;}
.select2-container .select2-results__option[aria-selected] {
padding-top: 10px;
padding-bottom: 10px;
padding-left: 24px;
}
#media (max-width: 576px) {
.select2-container .select2-results__option[aria-selected] {
padding-left: 12px;
}
}
.select2-container .select2-results__option[aria-selected="true"] {
background: #403866;
color: white;
}
.select2-container .select2-results__option--highlighted[aria-selected] {
background: #827ffe;
color: white;
}
.select2-results__options {
font-family: Ubuntu-Bold;
font-size: 14px;
color: #555555;
line-height: 1.2;
}
.select2-search--dropdown .select2-search__field {
border: 1px solid #aaa;
outline: none;
font-family: Ubuntu-Bold;
font-size: 15px;
color: #333333;
line-height: 1.2;
}
.wrap-input100 .dropDownSelect2 .select2-container--open {
width: 100% !important;
}
.wrap-input100 .dropDownSelect2 .select2-dropdown {
width: calc(100% + 2px) !important;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!DOCTYPE html>
<html lang="en">
<head>
<title>Blackfynn Exporter</title>
<meta charset="UTF-8">
<!--===============================================================================================-->
<link rel="icon" type="image/png" href="images/icons/favicon.ico" />
<!--===============================================================================================-->
<script src="build/build.js"></script>
<script src="https://cdn.plot.ly/plotly-latest.min.js"></script>
</head>
<body>
<div id='half-height' style="height: 40% !important">
<div id='blackfynn-panel' style="position: relative">
<div class="container-login100 datasetUI" id="dataset_div">
<div class="wrap-data100 p-t-50 p-b-90 datasetUI">
<form class="contact100-form validate-form">
<span class="login100-form-title p-b-51">
Data Viewer
</span>
<div class=" input100 wrap-input100 input100-select bg1 datasetUI">
<span class="label-input100"></span>
<div id="channel_div">
<select class="js-select2" name="service" id="select_channel">
<option>Channel Selection</option>
</select>
<div class="dropDownSelect2"></div>
</div>
</div>
</form>
<div class="datasetUI" id="chart_div"></div>
<br>
<div id="exportURL">
</div>
</div>
</div>
</div>
</div>
<!--===============================================================================================-->
<!--===============================================================================================-->
</body>
</html>

Answer 1

A child element does not inherit the height of its parent.
Reference: MDN
You can however set its value to height:inherit; CodePen Example
You could also use height: 100% or max-height: 100%
In any situation you have to think what you want to do with the content if it is too much to fit in that set height: overflow: hidden; overflow-y:hidden; overflow-y: scroll.