![\"Logo](\"https://storageapi.fleek.co/9e3a4e47-ee08-4191-9bbf-f01f3fa55969-bucket/animation_640_kww5kz9n.gif\")
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\n ![\"Neil](\"https://storageapi.fleek.co/esongur-team-bucket/kullanilabilir.png\")
\n Adding a dark mode is basically adding a theme. The principles are the same for adding a light mode to a dark website or alternative styling based on user-defined variables, the time of year or holidays.
\nI added theming with a mix of and CSS. In this post I’ll go step by step into the details of how I did it and what I learned.
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\n \nSetup
\nThe themes are activated by CSS classes on the root element. When the page is loaded, I want to apply the theme that most likely suits the visitor (you!) best. After all, most people don’t like configuring websites before they can read a blog post, so the the whole theming feature would likely remain unused otherwise. So I have to make a guess about what the visitor wants and expects. I do that in this order:
\n- \n
- I assume people don’t want the theme to change when they navigate between pages. So if the page loaded isn’t the first page they visit, I want to use the theme that was used before. \n
- If it’s the first page they view on my site, their browser may be able to tell their preference. \n
- If no preference is available, we can base the choice based on whether it’s day or night. \n
Every time a page is loaded, in the current or a new tab, it checks if a theme was set previously. Because the preference for a light or dark theme can change during the day, with every change, I add a time stamp to the saved setting. Only when the state was saved less than two hours ago, it’s applied:
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\nHeader 2
\nHeader 3
\nHeader 4
\nHeader 5
\nHeader 6
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- list item 1 \n
- list item 2 \n
- list item 3 \n
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\n ![](\"https://storageapi.fleek.co/9e3a4e47-ee08-4191-9bbf-f01f3fa55969-bucket/BrandAssets/Taum.png\")
\n ![\"ice](\"https://storageapi.fleek.co/2896c665-7893-4b84-bd96-201684ea23a2-bucket/TaumTokenlogo1.png\")
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