Karim Aya

Karim Aya


Create A Dark/Light Mode Switch with CSS Variables

Giving your users a way to customise the interface to their preference is a huge win for user experience. Here we are going to provide the user with a simple switch to toggle between dark mode and light mode and we will also try to remember their preference for future visits.

Let’s begin!

If you don’t have a website of your own to which you wish to add this functionality, use this demo website to follow along.

Adding the CSS

We will be adding CSS custom properties also known as CSS variables, which we can reference and modify throughout the document. If you wish to read more about custom properties you can read on MDN.

Here’s the tldr; version -

Custom properties (sometimes referred to as CSS variables or cascading variables) are entities defined by CSS authors that contain specific values to be reused throughout a document. They are set using custom property notation (e.g., --main-color: black;) and are accessed using the var() function (e.g., color: var(–main-color);)

First, we’ll add our light or default mode css variables to the :root pseudo class. It matches with the root element in your document tree, generally the <html> tag. We will use :root because we want to avail the variables globally.

:root {
    --primary-color: #302AE6;
    --secondary-color: #536390;
    --font-color: #424242;
    --bg-color: #fff;
    --heading-color: #292922;

Second, we’ll add our dark mode css variables.

[data-theme=“dark”] {
–primary-color: #9A97F3;
–secondary-color: #818cab;
–font-color: #e1e1ff;
–bg-color: #161625;
–heading-color: #818cab;

What is [data-theme=“dark”]? This means we are referencing a data attribute called data-theme with a value “dark”. We will find the use of it in a while.

Then, we can reference these variables in our stylesheets like so-

body {
background-color: var(–bg-color);
color: var(–font-color);

/*other styles*/


h1 {
color: var(–secondary-color);

/*other styles*/


a {
color: var(–primary-color);

/*other styles*/


Adding the HTML “toggle switch markup”

This is essentially just a checkbox, however we will add some additional markup to style like a toggle switch. I referenced the styles from this codepen.

<div class=“theme-switch-wrapper”>
<label class=“theme-switch” for=“checkbox”>
<input type=“checkbox” id=“checkbox” />
<div class=“slider round”></div>
<em>Enable Dark Mode!</em>

/Simple css to style it like a toggle switch/
.theme-switch-wrapper {
display: flex;
align-items: center;

em {
margin-left: 10px;
font-size: 1rem;
.theme-switch {
display: inline-block;
height: 34px;
position: relative;
width: 60px;

.theme-switch input {

.slider {
background-color: #ccc;
bottom: 0;
cursor: pointer;
left: 0;
position: absolute;
right: 0;
top: 0;
transition: .4s;

.slider:before {
background-color: #fff;
bottom: 4px;
content: “”;
height: 26px;
left: 4px;
position: absolute;
transition: .4s;
width: 26px;

input:checked + .slider {
background-color: #66bb6a;

input:checked + .slider:before {
transform: translateX(26px);

.slider.round {
border-radius: 34px;

.slider.round:before {
border-radius: 50%;

Adding the JavaScript

The final part is to add the bit of JavaScript to tie it all together.

We have 3 tasks in hand-

  • Add event handlers to handle accordingly the check/uncheck event of toggle-switch
  • Store the user preference for future visits
  • Check for saved user preference, if any, on load of the website

Adding the event handlers

const toggleSwitch = document.querySelector(‘.theme-switch input[type=“checkbox”]’);

function switchTheme(e) {
if (e.target.checked) {
document.documentElement.setAttribute(‘data-theme’, ‘dark’);
else {
document.documentElement.setAttribute(‘data-theme’, ‘light’);

toggleSwitch.addEventListener(‘change’, switchTheme, false);

Remember, the data-theme attribute we referenced in CSS above, this is where it’s getting added to our root element.

Store the user preference for future visits

We will use browser’s localStorage to store the user preference.

Let’s modify our switchTheme function -

function switchTheme(e) {
if (e.target.checked) {
document.documentElement.setAttribute(‘data-theme’, ‘dark’);
localStorage.setItem(‘theme’, ‘dark’); //add this
else {
document.documentElement.setAttribute(‘data-theme’, ‘light’);
localStorage.setItem(‘theme’, ‘light’); //add this

Check for saved user preference, if any, on load of the website

We will check if the theme preference is saved, if yes then we will, accordingly-

  • set our data-theme attribute
  • check/uncheck our toggle-switch checkbox

const currentTheme = localStorage.getItem(‘theme’) ? localStorage.getItem(‘theme’) : null;

if (currentTheme) {
document.documentElement.setAttribute(‘data-theme’, currentTheme);

if (currentTheme === 'dark') {
    toggleSwitch.checked = true;


That’s it! Check out the full demo below.

I recently added this to [my website](https://ananyaneogi.com), so check that out as well, maybe!Pro-Tip: How to decide on the color scheme?

My suggestion is to stay in the same spectrum of your primary or brand color and generate a palette out of it. Use the darkest shade from the palette as the background color and the lighter shades as font colors when in dark mode. I used this color shades generator for generating my color palette.

Even if you don’t end up using the exact colors generated, it is still a good place to start. Even I ended up fine tuning the colors I ultimately used.

Originally published by Ananya Neogi at https://dev.to/ananyaneogi/create-a-dark-light-mode-switch-with-css-variables-34l8

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Create A Dark/Light Mode Switch with CSS Variables
Easter  Deckow

Easter Deckow


PyTumblr: A Python Tumblr API v2 Client



Install via pip:

$ pip install pytumblr

Install from source:

$ git clone https://github.com/tumblr/pytumblr.git
$ cd pytumblr
$ python setup.py install


Create a client

A pytumblr.TumblrRestClient is the object you'll make all of your calls to the Tumblr API through. Creating one is this easy:

client = pytumblr.TumblrRestClient(

client.info() # Grabs the current user information

Two easy ways to get your credentials to are:

  1. The built-in interactive_console.py tool (if you already have a consumer key & secret)
  2. The Tumblr API console at https://api.tumblr.com/console
  3. Get sample login code at https://api.tumblr.com/console/calls/user/info

Supported Methods

User Methods

client.info() # get information about the authenticating user
client.dashboard() # get the dashboard for the authenticating user
client.likes() # get the likes for the authenticating user
client.following() # get the blogs followed by the authenticating user

client.follow('codingjester.tumblr.com') # follow a blog
client.unfollow('codingjester.tumblr.com') # unfollow a blog

client.like(id, reblogkey) # like a post
client.unlike(id, reblogkey) # unlike a post

Blog Methods

client.blog_info(blogName) # get information about a blog
client.posts(blogName, **params) # get posts for a blog
client.avatar(blogName) # get the avatar for a blog
client.blog_likes(blogName) # get the likes on a blog
client.followers(blogName) # get the followers of a blog
client.blog_following(blogName) # get the publicly exposed blogs that [blogName] follows
client.queue(blogName) # get the queue for a given blog
client.submission(blogName) # get the submissions for a given blog

Post Methods

Creating posts

PyTumblr lets you create all of the various types that Tumblr supports. When using these types there are a few defaults that are able to be used with any post type.

The default supported types are described below.

  • state - a string, the state of the post. Supported types are published, draft, queue, private
  • tags - a list, a list of strings that you want tagged on the post. eg: ["testing", "magic", "1"]
  • tweet - a string, the string of the customized tweet you want. eg: "Man I love my mega awesome post!"
  • date - a string, the customized GMT that you want
  • format - a string, the format that your post is in. Support types are html or markdown
  • slug - a string, the slug for the url of the post you want

We'll show examples throughout of these default examples while showcasing all the specific post types.

Creating a photo post

Creating a photo post supports a bunch of different options plus the described default options * caption - a string, the user supplied caption * link - a string, the "click-through" url for the photo * source - a string, the url for the photo you want to use (use this or the data parameter) * data - a list or string, a list of filepaths or a single file path for multipart file upload

#Creates a photo post using a source URL
client.create_photo(blogName, state="published", tags=["testing", "ok"],

#Creates a photo post using a local filepath
client.create_photo(blogName, state="queue", tags=["testing", "ok"],
                    tweet="Woah this is an incredible sweet post [URL]",

#Creates a photoset post using several local filepaths
client.create_photo(blogName, state="draft", tags=["jb is cool"], format="markdown",
                    data=["/Users/johnb/path/to/my/image.jpg", "/Users/johnb/Pictures/kittens.jpg"],
                    caption="## Mega sweet kittens")

Creating a text post

Creating a text post supports the same options as default and just a two other parameters * title - a string, the optional title for the post. Supports markdown or html * body - a string, the body of the of the post. Supports markdown or html

#Creating a text post
client.create_text(blogName, state="published", slug="testing-text-posts", title="Testing", body="testing1 2 3 4")

Creating a quote post

Creating a quote post supports the same options as default and two other parameter * quote - a string, the full text of the qote. Supports markdown or html * source - a string, the cited source. HTML supported

#Creating a quote post
client.create_quote(blogName, state="queue", quote="I am the Walrus", source="Ringo")

Creating a link post

  • title - a string, the title of post that you want. Supports HTML entities.
  • url - a string, the url that you want to create a link post for.
  • description - a string, the desciption of the link that you have
#Create a link post
client.create_link(blogName, title="I like to search things, you should too.", url="https://duckduckgo.com",
                   description="Search is pretty cool when a duck does it.")

Creating a chat post

Creating a chat post supports the same options as default and two other parameters * title - a string, the title of the chat post * conversation - a string, the text of the conversation/chat, with diablog labels (no html)

#Create a chat post
chat = """John: Testing can be fun!
Renee: Testing is tedious and so are you.
John: Aw.
client.create_chat(blogName, title="Renee just doesn't understand.", conversation=chat, tags=["renee", "testing"])

Creating an audio post

Creating an audio post allows for all default options and a has 3 other parameters. The only thing to keep in mind while dealing with audio posts is to make sure that you use the external_url parameter or data. You cannot use both at the same time. * caption - a string, the caption for your post * external_url - a string, the url of the site that hosts the audio file * data - a string, the filepath of the audio file you want to upload to Tumblr

#Creating an audio file
client.create_audio(blogName, caption="Rock out.", data="/Users/johnb/Music/my/new/sweet/album.mp3")

#lets use soundcloud!
client.create_audio(blogName, caption="Mega rock out.", external_url="https://soundcloud.com/skrillex/sets/recess")

Creating a video post

Creating a video post allows for all default options and has three other options. Like the other post types, it has some restrictions. You cannot use the embed and data parameters at the same time. * caption - a string, the caption for your post * embed - a string, the HTML embed code for the video * data - a string, the path of the file you want to upload

#Creating an upload from YouTube
client.create_video(blogName, caption="Jon Snow. Mega ridiculous sword.",

#Creating a video post from local file
client.create_video(blogName, caption="testing", data="/Users/johnb/testing/ok/blah.mov")

Editing a post

Updating a post requires you knowing what type a post you're updating. You'll be able to supply to the post any of the options given above for updates.

client.edit_post(blogName, id=post_id, type="text", title="Updated")
client.edit_post(blogName, id=post_id, type="photo", data="/Users/johnb/mega/awesome.jpg")

Reblogging a Post

Reblogging a post just requires knowing the post id and the reblog key, which is supplied in the JSON of any post object.

client.reblog(blogName, id=125356, reblog_key="reblog_key")

Deleting a post

Deleting just requires that you own the post and have the post id

client.delete_post(blogName, 123456) # Deletes your post :(

A note on tags: When passing tags, as params, please pass them as a list (not a comma-separated string):

client.create_text(blogName, tags=['hello', 'world'], ...)

Getting notes for a post

In order to get the notes for a post, you need to have the post id and the blog that it is on.

data = client.notes(blogName, id='123456')

The results include a timestamp you can use to make future calls.

data = client.notes(blogName, id='123456', before_timestamp=data["_links"]["next"]["query_params"]["before_timestamp"])

Tagged Methods

# get posts with a given tag
client.tagged(tag, **params)

Using the interactive console

This client comes with a nice interactive console to run you through the OAuth process, grab your tokens (and store them for future use).

You'll need pyyaml installed to run it, but then it's just:

$ python interactive-console.py

and away you go! Tokens are stored in ~/.tumblr and are also shared by other Tumblr API clients like the Ruby client.

Running tests

The tests (and coverage reports) are run with nose, like this:

python setup.py test

Author: tumblr
Source Code: https://github.com/tumblr/pytumblr
License: Apache-2.0 license

#python #api 

How To Create Dark and Light Mode Website using jQuery

Hello Friends,

In this tutorial i will show you How To Create Dark and Light Mode Website using jQuery.

As you can see many website and mobile applications are provide light theme as well as dark theme to user, It is useful for websites which have long content and requires users to focus on the screen for a long time.

Read More : How To Create Dark and Light Mode Website using jQuery


Read Also : How To Generate Barcode In Laravel


#how to create dark and light mode website using jquery #dark and light mode #how to add dark mode and light mode in website #day and night mode #jquery

How To Toggle Dark and Light Mode using jQuery

Hello Guys,

In this tutorial I will show you how to toggle between dark and light mode using jQuery.

As per the current trend of web development in many websites provides to user for reading select theme like dark mode and light mode or day mode and night mode of website and it’s very easy to implement in website.

In this just write some css code and java script for toggle dark mode and light mode website also you can store in local storage for save the state of user select theme like dark mode and light of website.

Read More : How To Toggle Dark and Light Mode using jQuery


Read Also : How Generate PDF From HTML View In Laravel


#how to toggle dark and light mode using jquery #dark and light mode #toggle between light and dark mode #jquery #day and night mode #dark mode website

Dark Mode using CSS Variables

Are you stuck with (LESS/SASS) pre-processor based color variables and looking around for solutions to implement dark mode?

You came to the right place!

Are you looking for an elegant way to implement a dark mode in your new project?

You came to the right place!

Are you looking for a way to** listen to the operating system theme** preference and switch your app’s theme accordingly?

You came to the right place!

Image for post

A complete guide for elegantly implementing and switching between light and dark themes for web apps.


  • Demo
  • Pre-processor independence
  • Designing color variables in CSS
  • Setting up light and dark themes
  • Listen to the Operating System theme

#css-variables #dark-mode #dark-theme #css

Raleigh  Hayes

Raleigh Hayes


Theme Switcher with CSS Variables - Tutorial

Hello! For my last video of 2020, we are learning how to handle themes with CSS Variables, with a cool theme switcher from twitter. Enjoy!

Useful Links:
GitHub: https://github.com/redhwannacef/youtube/tree/master/theme-switcher

#css variables #css #tutorial #css variables - tutorial #css theme switcher