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How to center CSS Grid but child elements at the start?

I want to implement this layout with CSS Grid or Flexbox. If necessary, it is also possible to use JS.
In the pictures you can see how the child elements should be arranged when adding 1, 2, 3 and 4 child elements in a sequence
The content is generated dynamically. TThat is, the number of child elements is unknown. There may be a maximum of 3 child elements in a row. The grid items should be centered. The whole Layout should also be responsive.
.parent {
background-color: red;
display: grid;
grid-template-columns: repeat(3, 1fr);
grid-gap: 20px;
justify-content: center;
/* 3* 350px width of child elements + 2*20px gap*/
max-width: 1090px;
padding: 20px;
}
.child {
width: 350px;
height: 450px;
background-color: blue;
}
<div class="parent">
<div class="child"></div>
<div class="child"></div>
<div class="child"></div>
<div class="child"></div>
<div class="child"></div>
</div>
It is currently not responsive (if possible without media queries) and the child elements are not centered.
Do you know how I can implement this layout?

Don't define 3 columns but rely on implicit column creation:
.parent {
background-color: red;
display: grid;
grid-auto-columns: calc((100% - 2*20px)/3); /* size of one column */
grid-gap: 20px;
justify-content: center;
margin: 10px;
}
.child {
height: 50px;
background-color: blue;
}
/* place each item in the adequate column */
.child:nth-child(3n + 1) {grid-column: 1}
.child:nth-child(3n + 2) {grid-column: 2}
.child:nth-child(3n + 3) {grid-column: 3}
<div class="parent">
<div class="child"></div>
</div>
<div class="parent">
<div class="child"></div>
<div class="child"></div>
</div>
<div class="parent">
<div class="child"></div>
<div class="child"></div>
<div class="child"></div>
</div>
<div class="parent">
<div class="child"></div>
<div class="child"></div>
<div class="child"></div>
<div class="child"></div>
</div>

I think I have something for this using implicit grids:
* {
box-sizing: border-box;
}
body {
display: flex;
flex-direction: column;
gap: 50px;
background: #000;
}
section {
width: 100%;
padding: 30px;
background: #666;
}
.grid-inner {
display: grid;
gap: 30px;
justify-content: center;
grid-auto-columns: calc(33% - 15px);
}
.box {
padding: 30px;
background: white;
border: 1px solid black;
}
.box:nth-child(2) {
grid-column: 2;
}
.box:nth-child(3) {
grid-column: 3;
}
<section>
<div class="grid-inner">
<div class="box"></div>
</div>
</section>
<section>
<div class="grid-inner">
<div class="box"></div>
<div class="box"></div>
</div>
</section>
<section>
<div class="grid-inner">
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
</div>
</section>
<section>
<div class="grid-inner">
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
</div>
</section>
<section>
<div class="grid-inner">
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
</div>
</section>

How do I toggle visibility of an entire dynamic row (flex wrap)?

Current Behavior
I have the following basic structure:
<section id="containers">
<div class="box" id="box1">
<div class="collapsible"><h2>Box 1</h2></div>
<div class="content">Content</div>
</div>
<div class="box" id="box2">
<div class="collapsible"><h2>Box 2</h2></div>
<div class="content">Content</div>
</div>
<!-- ... dozens of .boxes ... -->
</section>
#containers is .display: flex; flex-wrap: wrap, so the number of boxes on any one row is dynamic. This is an important feature that must be maintained.
Here's a minimal working example:
$(document).ready(function() {
$(".collapsible").click(function() {
$( this ).next().slideToggle();
});
});
#containers {
display: flex;
flex-wrap: wrap;
gap: 1em;
}
.box {
min-width: 15em;
background: #888;
border: #555 1px solid;
overflow: hidden;
border-radius: 0.5em;
}
.collapsible {
background: #ccc;
cursor: pointer;
}
.collapsible h2 {
margin: 0;
margin-left: 16px;
font-size: 2rem;
}
.collapsible:hover {
background: #aaf;
}
.content {
margin: 0.5em;
margin-left: 16px;
display: none; /* Initially collapsed */
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<body>
<p id="status"></p>
<section id="containers">
<div class="box" id="box1">
<div class="collapsible"><h2>Box 1</h2></div>
<div class="content">Content</div>
</div>
<div class="box" id="box2">
<div class="collapsible"><h2>Box 2</h2></div>
<div class="content">Content</div>
</div>
<div class="box" id="box3">
<div class="collapsible"><h2>Box 3</h2></div>
<div class="content">Content</div>
</div>
<div class="box" id="box4">
<div class="collapsible"><h2>Box 4</h2></div>
<div class="content">Content</div>
</div>
<div class="box" id="box5">
<div class="collapsible"><h2>Box 5</h2></div>
<div class="content">Content</div>
</div>
</section>
</body>
I can easily use .slideToggle() to toggle visibility of a sibling (.content) underneath one of the clickable .collapsible divs:
$(".collapsible").click(function() {
$( this ).next().slideToggle();
});
Desired Behavior and Remarks
What I'd like is, on click of any .collapsible div in a row, the entire row will be toggled. That is, every .content div on the same horizontal row as displayed in the current viewport.
This must handle rows with dynamic number of columns, including viewport resizing. I'm flexible on the precise behavior, though.
Is this possible? And how much will it hurt?🙂 Changes to the document structure (such as adding some sort of row container) are OK, and I don't mind using some JS/jQuery code of course. The main thing I can't do is hard code the number of columns, as I need my site to remain responsive on vertical phones and fullscreen desktop browsers.

Maybe the jQuery slideToggle() function is not the best method.
Since a row will be the same height , you may look at a method to set size from 0 to another value. anybox resized will stretch other boxes on the same row.
here an example of the idea, setting a max-height from 0 to 200px and a transition.
it toggles a class.
$(document).ready(function() {
$(".collapsible").click(function() {
this.classList.toggle('slide');// plain javascript to toggle a class
});
});
*{box-sizing:border-box}
#containers {
display: flex;
flex-wrap: wrap;
gap: 1em;
}
.box {
min-width: 15em;
background: #888;
border: #555 1px solid;
overflow: hidden;
border-radius: 0.5em;
}
.collapsible {
background: #ccc;
cursor: pointer;
}
.collapsible h2 {
margin: 0;
margin-left: 16px;
font-size: 2rem;
}
p{margin-top:0;}
.collapsible:hover {
background: #aaf;
}
.content {
margin:0 0.5em;
margin-left: 16px;
max-height:0; /* Initially collapsed */
transition:0.5s
}
.slide + .content{max-height:400px;/* which one got the class*/ color:darkred}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<body>
<p id="status"></p>
<section id="containers">
<div class="box" id="box1">
<div class="collapsible"><h2>Box 1</h2></div>
<div class="content"><p>Content</p></div>
</div>
<div class="box" id="box2">
<div class="collapsible"><h2>Box 2</h2></div>
<div class="content"><p>Content</p><p>Content</p></div>
</div>
<div class="box" id="box3">
<div class="collapsible"><h2>Box 3</h2></div>
<div class="content"><p>Content</p></div>
</div>
<div class="box" id="box4">
<div class="collapsible"><h2>Box 4</h2></div>
<div class="content"><p>Content</p><p>Content</p><p>Content</p></div>
</div>
<div class="box" id="box5">
<div class="collapsible"><h2>Box 5</h2></div>
<div class="content"><p>Content</p></div>
</div>
</section>
</body>
What you are missing here , is to set the height of the row to the height of the taller box, unless they will all be the same height.
For this, you can look for every box at the same top offset that the one clicked, and look for the tallest innercontent of the .contents and use this height .
Here comes the idea looking where each are standing and resets a max-height rule, you can inspire from too:
// defaut : supposed to be with no class 'slide' set on html elements
$(document).ready(function () {
let boxes = document.querySelectorAll(".collapsible");
let contents = document.querySelectorAll(".content");
$(".collapsible").click(function (event) {
let arrayContent = [];//reset
let hide=false;
for (i = 0; i < contents.length; i++) {
contents[i].style.maxHeight = "min-content";
let index = i;
let heightC = contents[i].offsetTop;
let boxOffset = contents[i].parentNode.offsetTop + 1;
// a few infos .add/remove what is needed
arrayContent.push({
index,
heightC,
boxOffset
});
contents[i].setAttribute("style", "");// resets inline style
}
let rowOffset = this.offsetTop;
if(this.classList.contains('slide')) {
hide=true;
}
let classState = this.classList;
arrayContent.forEach(function (obj) {
if (obj.boxOffset == rowOffset) {
if(hide == true) boxes[obj.index].classList.add('slide');/* reset needed if window resized => rows reorganized ? */
boxes[obj.index].classList.toggle("slide");
} else {
boxes[obj.index].classList.remove("slide");
}
});
});
});
* {
box-sizing: border-box
}
#containers {
display: flex;
flex-wrap: wrap;
gap: 1em;
}
.box {
min-width: 15em;
background: #888;
border: #555 1px solid;
overflow: hidden;
border-radius: 0.5em;
}
.collapsible {
background: #ccc;
cursor: pointer;
}
.collapsible h2 {
margin: 0;
margin-left: 16px;
font-size: 2rem;
}
p {
margin-top: 0;
}
.collapsible:hover {
background: #aaf;
}
.content {
margin: 0 0.5em;
margin-left: 16px;
max-height: 0;
/* Initially collapsed */
transition: max-height 0.5s!important
}
.slide~.content {
max-height: 400px;
/* which one got the class*/
color: darkred;
}
.collapsible:before {
content: attr(class)
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<body>
<p id="status"></p>
<section id="containers">
<div class="box" id="box1">
<div class="collapsible">
<h2>Box 1</h2>
</div>
<div class="content">
<p>Content</p>
</div>
</div>
<div class="box" id="box2">
<div class="collapsible">
<h2>Box 2</h2>
</div>
<div class="content">
<p>Content</p>
<p>Content</p>
</div>
</div>
<div class="box" id="box3">
<div class="collapsible">
<h2>Box 3</h2>
</div>
<div class="content">
<p>Content</p>
</div>
</div>
<div class="box" id="box4">
<div class="collapsible">
<h2>Box 4</h2>
</div>
<div class="content">
<p>Content</p>
<p>Content</p>
<p>Content</p>
</div>
</div>
<div class="box" id="box5">
<div class="collapsible">
<h2>Box 5</h2>
</div>
<div class="content">
<p>Content</p>
</div>
</div>
</section>
</body>

Fit boxes dynamically in a container with flexbox

I want to arrange boxes dynamically in a container using flexbox. The arrangement looks like this:
For three or four boxes, the boxes should arrange like in first pic.
For six boxes, the boxes should fit in two rows with three columns. However for seven boxes, the arrangement should look like that displayed in second picture, and so on.
The width and height of the container are fixed.
Is this possible purely with Flexbox?
HTML:
<div class="container">
<div class="box">AB</div>
<div class="box">CD</div>
<div class="box">EF</div>
<div class="box">GH</div>
<div class="box">IJ</div>
<div class="box">KL</div>
<div class="box">MN</div>
<div class="box">OP</div>
<div class="box">QR</div>
<div class="box">ST</div>
<div class="box">UV</div>
<div class="box">XY</div>
</div>
CSS:
.container {
width: 160px;
height: 160px;
border: 1px solid blue;
display: flex;
}
.box {
border: 1px solid red;
text-align: center;
}
JavaScript:
function align(nodes) {
var nodeLength = nodes.length;
if(nodeLength == 1) {
// nodes occupies entire box
}
else if (nodeLength == 2) {
// nodes displayed in two columns
}
else if(nodeLength > 2 && nodeLength < 5) {
// nodes displayed in two rows, two columns
}
else if(nodeLength > 4 && nodeLength <= 6) {
// display in two columns and three rows
}
/*
.
.
.
and so on
*/
}
var boxes = document.getElementsByClassName('box');
align(boxes);
Here is a fiddle for the same.

Flexbox solution (without JavaScript)
Calculate width and height of each item in the square as follows
.square-item {
width: calc(100% / n);
height: calc(100% / n);
}
n is number of columns (or rows).
Example
.square-wrapper {
display: inline-block;
vertical-align: top;
}
.square {
--size: 160px;
}
.square {
display: flex;
flex-wrap: wrap;
align-content: flex-start;
width: var(--size);
height: var(--size);
}
.square>div {
box-shadow: 1px 3px 3px #abc;
position: relative;
}
.square p {
margin: 0;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.square.s-2_2>div {
width: calc(100% / 2);
height: calc(100% / 2);
}
.square.s-3_3>div {
width: calc(100% / 3);
height: calc(100% / 3);
}
.square.s-4_4>div {
width: calc(100% / 4);
height: calc(100% / 4);
}
/* Add more custom square classes */
/* ... */
<div class="square-wrapper">
<div class="square s-2_2">
<div>
<p>1</p>
</div>
<div>
<p>2</p>
</div>
<div>
<p>3</p>
</div>
<div>
<p>4</p>
</div>
</div>
</div>
<div class="square-wrapper">
<div class="square s-3_3">
<div>
<p>1</p>
</div>
<div>
<p>2</p>
</div>
<div>
<p>3</p>
</div>
<div>
<p>4</p>
</div>
<div>
<p>5</p>
</div>
<div>
<p>6</p>
</div>
<div>
<p>7</p>
</div>
<div>
<p>8</p>
</div>
<div>
<p>9</p>
</div>
</div>
</div>
<div class="square-wrapper">
<div class="square s-4_4">
<div>
<p>1</p>
</div>
<div>
<p>2</p>
</div>
<div>
<p>3</p>
</div>
<div>
<p>4</p>
</div>
<div>
<p>5</p>
</div>
<div>
<p>6</p>
</div>
<div>
<p>7</p>
</div>
<div>
<p>8</p>
</div>
<div>
<p>9</p>
</div>
<div>
<p>10</p>
</div>
<div>
<p>11</p>
</div>
<div>
<p>12</p>
</div>
<div>
<p>13</p>
</div>
<div>
<p>14</p>
</div>
<div>
<p>15</p>
</div>
<div>
<p>16</p>
</div>
</div>
</div>
JavaScript solution with flexbox
Get all .square. Loop through them and loop through their children and add a style to each of them.
child.setAttribute("style", "width: ...; height: ...")
The size is calc(100% / Math.sqrt(number of square items))
Example
var squares = document.querySelectorAll(".square");
for (var i = 0; i < squares.length; i += 1) {
for (var j = 0; j < squares[i].children.length; j += 1) {
var child = squares[i].children[j],
size = "calc(100% /" + Math.ceil(Math.sqrt(squares[i].children.length)) + ")";
child.setAttribute("style", "width: " + size + "; height: " + size);
}
}
.square-wrapper {
display: inline-block;
vertical-align: top;
}
.square {
--size: 160px;
}
.square {
display: flex;
flex-wrap: wrap;
align-content: start;
width: var(--size);
height: var(--size);
}
.square>div {
box-shadow: 1px 3px 3px #abc;
position: relative;
}
.square p {
margin: 0;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
<div class="square-wrapper">
<div class="square">
<div>
<p>1</p>
</div>
<div>
<p>2</p>
</div>
<div>
<p>3</p>
</div>
<div>
<p>4</p>
</div>
<div>
<p>5</p>
</div>
</div>
</div>
<div class="square-wrapper">
<div class="square">
<div>
<p>1</p>
</div>
<div>
<p>2</p>
</div>
<div>
<p>3</p>
</div>
<div>
<p>4</p>
</div>
</div>
</div>
<div class="square-wrapper">
<div class="square">
<div>
<p>1</p>
</div>
<div>
<p>2</p>
</div>
<div>
<p>3</p>
</div>
<div>
<p>4</p>
</div>
<div>
<p>5</p>
</div>
<div>
<p>6</p>
</div>
<div>
<p>7</p>
</div>
<div>
<p>8</p>
</div>
<div>
<p>9</p>
</div>
</div>
</div>
<div class="square-wrapper">
<div class="square">
<div>
<p>1</p>
</div>
<div>
<p>2</p>
</div>
<div>
<p>3</p>
</div>
<div>
<p>4</p>
</div>
<div>
<p>5</p>
</div>
<div>
<p>6</p>
</div>
<div>
<p>7</p>
</div>
<div>
<p>8</p>
</div>
<div>
<p>9</p>
</div>
<div>
<p>10</p>
</div>
<div>
<p>11</p>
</div>
<div>
<p>12</p>
</div>
<div>
<p>13</p>
</div>
<div>
<p>14</p>
</div>
<div>
<p>15</p>
</div>
<div>
<p>16</p>
</div>
</div>
</div>

Make progress bars responsive

I have these progress bars which are suppose to work as ratings and they look good:
I have applied some CSS and I change their width with JavaScript by reading values from text files.
But are not responsive at all and whenever the window is resized:
HTML:
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<div class="second-part">
<div class="row">
<div class="side">
<div>5 stars</div>
</div>
<div class="middle">
<div class="bar-container">
<div class="bar11" style="width: 10% ; height: 18px; background-color: gold;"></div>
</div>
</div>
<div class="side right">
<div class="p11">150</div>
</div>
<div class="side">
<div>4 stars</div>
</div>
<div class="middle">
<div class="bar-container">
<div class="bar12" style="width: 10% ; height: 18px; background-color: gold;"></div>
</div>
</div>
<div class="side right">
<div class="p12">63</div>
</div>
<div class="side">
<div>3 stars</div>
</div>
<div class="middle">
<div class="bar-container">
<div class="bar13" style="width: 10% ; height: 18px; background-color: gold;"></div>
</div>
</div>
<div class="side right">
<div class="p13">15</div>
</div>
<div class="side">
<div>2 stars</div>
</div>
<div class="middle">
<div class="bar-container">
<div class="bar14" style="width: 10% ; height: 18px; background-color: gold;"></div>
</div>
</div>
<div class="side right">
<div class="p14">6</div>
</div>
<div class="side">
<div>1 star</div>
</div>
<div class="middle">
<div class="bar-container">
<div class="bar15" style="width: 10% ; height: 18px; background-color: gold;"></div>
</div>
</div>
<div class="side right">
<div class="p15">20</div>
</div>
</div>
</div>
CSS:
* {
box-sizing: border-box;
}
/* Three column layout */
.side {
float: left;
width: 15%;
margin-top:10px;
}
.middle {
margin-top:10px;
float: left;
width: 70%;
}
/* Place text to the right */
.right {
text-align: left;
}
/* Clear floats after the columns */
.row:after {
content: "";
display: table;
clear: both;
}
/* The bar container */
.bar-container {
width: 90%;
background-color: #f1f1f1;
text-align: center;
color: white;
}
/* Responsive layout - make the columns stack on top of each other instead of next to each other */
#media (max-width: 400px) {
.side, .middle {
width: 100%;
}
.right {
display: none;
}
}
JavaScript to change progress bar width:
var par1 = 4;
for(var i = 10; i < 16; i++) {
$('.p' + (i+1)).text(table[0][par1]);
$('.bar' + (i+1)).css("width", table[0][par1]);
par1++;
}
How could I make it more responsive? Thank you in advance!

I recommend using css flexbox, so the items wrap instead of overlap when the page is resized. You could use media queries with this to adjust the size of the items and container so they don't overlap/wrap. This site has a good explanation of flexbox: A Complete Guide to Flexbox.

Aligning boxes(divs) of equal size in html symmetrically according to their number

I want to make an HTML page that contains a box at the top and a certain number of boxes being dynamically generated using jquery, the number of boxes at the bottom of top box can be 4 at max.
I want to align these boxes dynamically and symmetrically in the html page. I am using angularjs's ng-repeat to generate boxes. I want the sizes of the boxes to remain same but arrange them symmetrically on the html page.
currently i am using angular js to dynamically create boxes and align them using col-md class of bootstrap. but this makes the size of boxes to change when the number of boxes change.
html code
<div id="header-wrapper" class="container vscrolling_container">
<div id="header" class="container vscrolling_container">
<div id="logo">
<h1 class="page-head-line" id="visionh"><a>Vision</a></h1>
<p id="visionp"><a rel="nofollow">{{visiontext}}</a></p>
</div>
</div>
</div>
<div class="row" id="missionstart">
<div ng-class="missioncount[missions.length]" ng-repeat="mission in missions" style="opacity: 0.9">
<div class="dashboard-div-wrapper" ng-class="bkclr[$index]">
<h1 id="{{mission.id}}" style="color: #000">{{mission.missionInfo}}</h1>
<div class="progress progress-striped active">
<div class="progress-bar progress-bar-success" role="progressbar" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100" style="width: 100%"></div>
</div>
<ul>
<li id="{{missioncontent.id}}" ng-repeat="missioncontent in mission.missionContent">
<p style="text-align: left">{{missioncontent.info}}</p>
</li>
</ul>
</div>
</div>
</div>
java script code
'use strict';
var mission_vision_mod = angular.module('myApp.mission_vision', ['ngRoute']);
mission_vision_mod.config(['$routeProvider', function($routeProvider) {
$routeProvider.when('/mission_vision', {
templateUrl: 'partials/mission_vision/mission_vision.html',
controller: 'mission_visionCtrl'
});
}]);
mission_vision_mod.controller('mission_visionCtrl', ['$scope','$http', function($scope, $http) {
$scope.visiontext = "Here is the content of vision";
$scope.bkclr = ['bk-clr-one','bk-clr-two','bk-clr-three','bk-clr-four'];
$scope.progressbar = ['progress-bar-warning','progress-bar-danger','progress-bar-success','progress-bar-primary'];
$scope.missioncount = ['col-md-0','col-md-12','col-md-6','col-md-4','col-md-3','col-md-2.5','col-md-2'];
$http.get('m_id.json').success(function(data){
$scope.missions = data;
$scope.len = data.length;
});
}]);

I have created a quick jsfiddle
HTML Content:
<div class="container">
<div class="header"></div>
<div class="content">
<div class="contentBox"></div>
<div class="contentBox"></div>
</div>
</div>
<br/><br/><br/>
<div class="container">
<div class="header"></div>
<div class="content">
<div class="contentBox"></div>
<div class="contentBox"></div>
<div class="contentBox"></div>
<div class="contentBox"></div>
</div>
</div>
Related CSS:
.container div {
height: 100px;
}
.header {
border: 1px solid black;
width: 75%;
margin: 5px auto;
}
.content {
text-align: center;
}
.contentBox {
border: 1px solid black;
width: 20%;
display: inline-block;
box-sizing: border-box;
}
Caution: I have used plain CSS for this demo.
Hope this helps you.

flexbox can do this
.wrap {
width: 80%;
margin: auto;
border: 1px solid black;
margin-bottom: 25px;
}
.top,
.item {
width: 100px;
height: 50px;
background: red;
}
.top {
display: inline-block;
}
.flex {
display: flex;
justify-content: space-around;
}
<div class="wrap">
<div class="flex">
<div class="top"></div>
</div>
<div class="flex">
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
</div>
</div>
JSfiddle Demo