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Dark mode delay when website is refreshed

I have developed a dark mode for my forum, but the moment I set the dark mode, and change the tab or refresh the page first the normal mode (or light mode) appears and in a few milliseconds it finally loads the g1 into the body class attribute, is there any way to eliminate the delay?
document.addEventListener('DOMContentLoaded', (event) => {
((localStorage.getItem('mode') || 'g1') === 'g1') ? document.querySelector('body').classList.add('g1') : document.querySelector('body').classList.remove('g1')
})
:root {/* Base principal */
--base1: #FFF;
--base2: #FAFAFA;
--base3: #F9F9F9;
--base4: #F7F7F7;
--base5: #F5F5F5;
--base6: #F0F0F0;
--base7: #EDEDED;
--borde1: #D3D3D3;
--borde2: rgba(0, 0, 0, 0.3);
--opacity1: rgba(249, 249, 249, 0.8);
--opacity2: rgba(0, 0, 0, 0.2);
--opacity3: rgba(255, 189, 149, 0.5);
--bg: url(https://i.imgur.com/E6Gmd5W.png);
--buscar: url(https://i.imgur.com/e1LpRR1.png);
--font1: #8C8C8C;
--font2: #FFF;
--sombra1: 1px 1px 0 white, -1px 1px 0 white, 1px -1px 0 white, -1px -1px 0 white;
--sombra2: 1px 1px 0 rgba(0, 0, 0, 0.2), 1px -1px 0 rgba(0, 0, 0, 0.2), -1px 1px 0 rgba(0, 0, 0, 0.2), -1px -1px 0 rgba(0, 0, 0, 0.2);
--colorp: #EC7209;
--colorp1: 255, 118, 0;}
.g1 {--base1: #111; --base2: #1C1C1C; --base3: #141414; --base4: #141414; --base5: #1C1C1C; --base6: #161616; --base7: #202020; --borde1: #000; --bg: url(https://i.imgur.com/1ehFdwl.png); --buscar: url(https://i.imgur.com/xqY0yy2.png); --sombra1: 1px 1px 0 black, -1px 1px 0 black, 1px -1px 0 black, -1px -1px 0 black; --colorp: #9E500C; --colorp1: 255, 118, 0; --opacity1: rgba(30, 30, 30, 0.6); --font2: #ECECEC}
.container {margin: 140px auto 0; width: 1000px; border: 20px solid var(--base4); outline: 1px solid var(--borde1); padding: 0; background: var(--base4)}
<div class="container"></div>
<a style="cursor: pointer" onclick="localStorage.setItem('mode', (localStorage.getItem('mode') || 'g1') === 'g1' ? 'bright' : 'g1'); localStorage.getItem('mode') === 'g1' ? document.querySelector('body').classList.add('g1') : document.querySelector('body').classList.remove('g1')">light/dark theme</a>

I had the same issue.
Just store the theme in a cookie and on the serverside you can check the cookie with $_COOKIE['...']

If 2 different radios are selected, Do something

I essentially have 1 radio selection with a few colours, all with the same attributes, just different values, using an onclick event to pass on the value. worked great, it would allow the user to click on a color(radio) and it would display an image.
Working fiddle - https://jsfiddle.net/ktmzy8L0/
The above now includes another radio selection called pattern. But every where I searched cant seem to find an answer to solve this.
Essential - If the user selects 2 separate radios [different names], show a different picture. If you are following the jsfiddle it would show a blue diamond(I would use a url to show the image depending on the 2 radio values they choose) and the image would popup in showpicture.
The below code I originally have for jquery
function CB(colorbackground) {
var url;
$('#showpictureheader').show();
$('#showpicture').show();
if (colorbackground == "Navy Blue") {
url = "https://www.colorhexa.com/023333.png";
document.getElementById("showpicture").style.backgroundImage = "url(" + url + ")";
$('#showpictureheader').text('Navy Blue Pattern');
}
}

This code makes it more dynamic. Simply add data-color='ff0000' to the bg color radio buttons. Then this code will simply take the selected pattern value and bg color radio and show the title and selected bgcolor.
bgcolor = "";
pattern = "";
$("input[type='radio']").on("change",function(){
if($(this).prop("name") == "properties[Background Color]"){
bgcolor = $(this);
}
else if($(this).prop("name") == "properties[Background Pattern]"){
pattern = $(this);
}
if(bgcolor && pattern){
$('#showpictureheader').show();
$('#showpicture').show();
url = "https://www.colorhexa.com/" + bgcolor.data("color") + ".png";
document.getElementById("showpicture").style.backgroundImage = "url(" + url + ")";
$('#showpictureheader').text(bgcolor.val() + ' ' + pattern.val());
}
});
.background-choices label>input {
visibility: hidden;
position: absolute;
}
.background-choices label>input+img {
cursor: pointer;
border: 1px solid transparent;
border-radius: 50%;
width: 30px;
height: 30px;
margin: 0 10px;
-webkit-box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.35);
-moz-box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.35);
box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.35);
}
#media only screen and (min-width: 500px) {
.background-choices label>input+img {
border: 2px solid transparent;
width: 40px;
height: 40px;
}
}
.background-choices label>input:checked+img {
border: 5px solid #fd8252;
}
.background-choices label>input:not(:checked)+img {
border: 5px solid #f4f5f5;
}
.background-choices label:hover {
opacity: 0.6;
}
.background-tab-wrapper h3 {
margin-top: 10px;
}
#showpictureheader {
display: none;
}
.showpictureheader{
text-align: center;
padding-bottom: 10px;
}
#showpicture {
border: 5px solid #f4f5f5;
cursor: pointer;
border-radius: 20px;
width: 250px;
height: 250px;
margin: 10px 10px;
-webkit-box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.35);
-moz-box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.35);
box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.35);
margin: auto;
display: none;
background-size: contain;
}
<div class="background-choices">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<h3>Color</h3>
<label>
<input data-color="000080" id="background-choice-input1" type="radio" name="properties[Background Color]" class="background-choices-selector" value="Navy Blue"/>
<img src="https://www.colorhexa.com/000080.png">
</label>
<h3>Pattern</h3>
<label>
<input id="background-choice-input2" type="radio" name="properties[Background Pattern]" value="Diamond"/>
<img src="https://w7.pngwing.com/pngs/884/524/png-transparent-diamond-rhombus-shape-oval-outline-s-blue-angle-white-thumbnail.png">
</label>
</div>
<div class="showpictureheader">
<h7 id="showpictureheader"></h7>
</div>
<div id="showpicture">
</div>

here is, you should separate to one more function.
function CB(bg) {
var url;
$('#showpictureheader').show();
$('#showpicture').show();
if (bg == "Navy Blue") {
url = "https://www.colorhexa.com/023333.png";
document.getElementById("showpicture").style.backgroundImage = "url(" + url + ")";
}
}
function secondcb() {
$('#showpictureheader').text('Navy Blue Pattern');
}
.background-choices label>input {
visibility: hidden;
position: absolute;
}
.background-choices label>input+img {
cursor: pointer;
border: 1px solid transparent;
border-radius: 50%;
width: 30px;
height: 30px;
margin: 0 10px;
-webkit-box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.35);
-moz-box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.35);
box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.35);
}
#media only screen and (min-width: 500px) {
.background-choices label>input+img {
border: 2px solid transparent;
width: 40px;
height: 40px;
}
}
.background-choices label>input:checked+img {
border: 5px solid #fd8252;
}
.background-choices label>input:not(:checked)+img {
border: 5px solid #f4f5f5;
}
.background-choices label:hover {
opacity: 0.6;
}
.background-tab-wrapper h3 {
margin-top: 10px;
}
#showpictureheader {
display: none;
}
.showpictureheader {
text-align: center;
padding-bottom: 10px;
}
#showpicture {
border: 5px solid #f4f5f5;
cursor: pointer;
border-radius: 20px;
width: 250px;
height: 250px;
margin: 10px 10px;
-webkit-box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.35);
-moz-box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.35);
box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.35);
margin: auto;
display: none;
background-size: contain;
}
<div class="background-choices">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<h3>Color</h3>
<label>
<input id="background-choice-input1" type="radio" name="properties[Background Color]" class="background-choices-selector" value="Navy Blue" onClick="CB(this.value);"/>
<img src="https://www.colorhexa.com/000080.png">
</label>
<h3>Pattern</h3>
<label>
<input onchange="secondcb()" id="background-choice-input2" type="radio" name="properties[Background Pattern]" value="Diamond"/>
<img src="https://w7.pngwing.com/pngs/884/524/png-transparent-diamond-rhombus-shape-oval-outline-s-blue-angle-white-thumbnail.png">
</label>
</div>
<div class="showpictureheader">
<h7 id="showpictureheader"></h7>
</div>
<div id="showpicture">
</div>

How to properly style the Select2 outline on :focus?

I'm using Select2 to style my <select> boxes, but I can't seem to style the forced outline which Chrome applies to the style:
Problem:
I've tried several lines of (very unprofessionally, !important) CSS code, but so far I haven't come up with the solution, this is what i'm at right now:
CSS:
.select2 > *:focus, .select2:focus .select2 > *, .select2 {
outline-width: 0px !important;
}
For the sake of excluding potential problems, i'm definitely including this CSS file, after my regular select2.css
Also, a fiddle would be problematic, but I could provide one if really necessary

This seems to do the trick:
<style>
.select2-container *:focus {
outline: none;
}
</style>
Here is a plunk.

This works for me:
&.select2-container--focus {
outline: none;
}

That's because neither select2 or chrome use the outline property. Here is the actual definition of select:focus pseudo element in select2 (+bootstrap):
.form-control:focus {
border-color: #66afe9;
outline: 0;
-webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(102, 175, 233, 0.6);
box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(102, 175, 233, 0.6);
}
Try changing border and box-shadow instead :
.form-control:focus {
border-color: unset;
-webkit-box-shadow: none;
box-shadow: none;
}
Hope this helps, cheers.

It using box shadow, not outline, look at the inspector:
.form-control:focus {
border-color: #66afe9;
outline: 0;
-webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(102, 175, 233, 0.6);
box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(102, 175, 233, 0.6);
}
so you need to reset it

Skeuomorphic keys for keyboard shortcut documentation

I'm writing up some documentation for the keyboard shortcuts for some software. The documentation is in html/css/js. I'd like to have images (skeuomorphic?) of a control and c key instead of just having [ctrl] + [c]. I have seen this done on the web, but I am not finding any solutions with my web searches.
How can I render the Control and C keys as images using HTML/CSS/JS? I am happy to use a third party party library to achieve the effect.

The following CSS will style text wrapped in <kbd></kbd> tags exactly the same as the buttons you see here at StackOverflow.
CSS
kbd {
padding: .1em .6em;
border: 1px solid #ccc;
font-size: 11px;
font-family: Arial, Helvetica, sans-serif;
background-color: #f7f7f7;
color: #333;
-moz-box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2), 0 0 0 2px #fff inset;
-webkit-box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2), 0 0 0 2px #fff inset;
box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2), 0 0 0 2px #fff inset;
border-radius: 3px;
display: inline-block;
margin: 0 .1em;
text-shadow: 0 1px 0 #fff;
line-height: 1.4;
white-space: nowrap
}
HTML
<kbd>⌘</kbd>+<kbd>X</kbd><br><br>
<kbd>Ctrl</kbd>+<kbd>Alt</kbd>+<kbd>Delete</kbd>
Output
⌘+X
Ctrl+Alt+Delete

There are pure CSS options for creating realistic, professional-quality key cap graphics. Google "keyboard key css", for a larger list, but my favorite is KEYS.css: it's super simple to use:
<link rel="stylesheet" href="keys.css" type="text/css" />
...
<kbd>Ctrl</kbd> + <kbd>Shift</kbd> + <kbd>S</kbd>
renders as:

Javascript: to change class width from 0% to 100% and from 100% to 0% non stop

The code below changes the width of the "inner" class from 0% to 100%, so the bar is filled progressively with the green color. But this is incomplete because once the width is 100% I need it to go back to 0% and then to 100% and so on .. it will only stop going from 0% to 100% and from 100% to 0% when clicked.
I'll figure out how to add the clicking even but please help me achieve the non stop changing width.
Thanks a ton!
<style>
.bar {
background-color: #191919;
border-radius: 16px;
padding: 4px;
position: relative;
overflow: hidden;
width: 300px;
height: 24px;
-webkit-border-radius: 16px;
-moz-border-radius: 16px;
border-radius: 16px;
-webkit-box-shadow: inset 0 1px 2px #000, 0 1px 0 #2b2b2b;
-moz-box-shadow: inset 0 1px 2px #000, 0 1px 0 #2b2b2b;
box-shadow: inset 0 1px 2px #000, 0 1px 0 #2b2b2b;
}
.bar .inner {
background: #999;
display: block;
position: absolute;
overflow: hidden;
max-width: 97.5% !important;
height: 24px;
text-indent: -9999px;
-webkit-border-radius: 12px;
-moz-border-radius: 12px;
border-radius: 12px;
-webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3),
inset 0 -1px 3px rgba(0, 0, 0, 0.4),
0 1px 1px #000;
-moz-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3),
inset 0 -1px 3px rgba(0, 0, 0, 0.4),
0 1px 1px #000;
box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3),
inset 0 -1px 3px rgba(0, 0, 0, 0.4),
0 1px 1px #000;
-webkit-transition: width 0.3s linear;
-moz-transition: width 0.3s linear;
transition: width 0.3s linear;
}
.green .inner {
background: #7EBD01;
background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#7EBD01), to(#568201));
background: -moz-linear-gradient(top, #7EBD01, #568201);
}
</style>
<script type="text/javascript">
for (i=0;i<=100;i++){
setTimeout(function(){
document.querySelector('.green.bar .inner').style.width = i+'%';
},0);
}
</script>
<div class="green bar">
<div class="inner" style="width:0%"></div>
</div>

Fiddle: http://jsfiddle.net/ZeYJy/
I have included two ways to implement my suggestion: The first bar immediately goes back to 0 after reaching 100, the second bar has a small delay.
Use the modulo operator % to reset the counter to zero at 100. See below:
<script>
window.onload = function(){
var counter = 0;
window.setInterval(function(){
document.querySelector('.green.bar .inner').style.width =
(++counter % 101) + '%';
}, 50);
}
</script>
This script adds an interval on load, which increase the width of the element. After the counter has reached 100, the width will be reset to zero.
Explanation of the code:
var counter = 0 (inside a function, window.onload) - A local variable is defined and initialised at zero.
window.setInterval(function(){ ... }, 50) - An interval is defined, activating the function (first argument) every 50 milliseconds (20x a second, adjust to your own wishes)
(++counter % 101) - Increments the counter by one, modulo 101:
The modulo operator calculates the remainder after division, ie: 0 % 101 = 0, 100 % 101 = 100 and 200 % 101 = 99, 201 % 101 = 100, 202 % 101 = 100

Instead of setTimeout, use setInterval.
Each time the interval is fired, use a function to work out how much to fill the bar. Once it hits 100, reset it.
You can then clear the interval using clearInterval once the user has clicked.

This article shows how to repeat a CSS animation infinitely. This will be easier on your CPU than using Javascript:
http://developer.apple.com/library/safari/#codinghowtos/Mobile/GraphicsMediaAndVisualEffects/_index.html