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@media (prefers-color-scheme: dark) {\n :root {\n --bg-color: #121212;\n --text-color: #f5f5f5;\n }\n}<\/pre> Of course, you can also read this value through JavaScript and further process it according to the situation, such as saving user preferences to local storage.<\/p> Check system preferences: window.matchMedia('(prefers-color-scheme: dark)').matches<\/code><\/li> Set the default theme: If the user has not selected it, use the system preferences<\/li> Storage user selection: Avoid changing back to default every refresh<\/li><\/ul> 3. Provide manual switching button<\/h3> Although automatic recognition is a good feature, users may have their own preferences. For example, they may like dark mode, but the system itself does not support it, or they want to temporarily switch to see the effect.<\/p> Therefore, it is recommended to add a \"Switch theme\" button to the interface. The function of this button is simple:<\/p> Click to switch .dark-mode<\/code> class<\/li> Or directly modify the class on <\/code><\/li> At the same time, save the user's selection into localStorage<\/code> and restore it next time you open the page<\/li><\/ul> Sample code:<\/p> const toggleBtn = document.getElementById('theme-toggle');\n\ntoggleBtn.addEventListener('click', () => {\n document.documentElement.classList.toggle('dark-mode');\n\n if (document.documentElement.classList.contains('dark-mode')) {\n localStorage.setItem('theme', 'dark');\n } else {\n localStorage.setItem('theme', 'light');\n }\n});\n\n\/\/ Read const savedTheme = localStorage.getItem('theme');\nif (savedTheme === 'dark') {\n document.documentElement.classList.add('dark-mode');\n}<\/pre> \n 4. Pay attention to the performance of pictures and icons<\/h3>\n One thing that many people tend to ignore is that in dark mode, pictures and icons may appear particularly bright, destroying the overall visual effect.<\/p>\n There are several solutions:<\/p>\n \n Add a translucent black mask to the picture<\/li>\n Use icon version with dark background<\/li>\n Use filter: brightness(0.8)<\/code> for some images to reduce brightness<\/li>\n Or prepare two sets of resources and change pictures when switching themes<\/li>\n<\/ul>\n Although this point is detailed, it directly affects the user experience, especially for e-commerce and information H5 applications.<\/p>\n \n Basically that's it. The key to achieving the dark mode is to have clear structure and clear logic, so don’t let the styles be confused. Make good use of CSS variables, cooperate with system detection and user preference storage, and you can create a practical and beautiful dark mode experience.<\/p>"} 国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂 Community Articles Topics Q&A Learn Course Programming Dictionary Tools Library Development tools Website Source Code PHP Libraries JS special effects Website Materials Extension plug-ins AI Tools Leisure Game Download Game Tutorials English 簡(jiǎn)體中文 English 繁體中文日本語(yǔ) ??? Melayu Fran?ais Deutsch Login singup Table of Contents 1. Use CSS variables to manage topics 2. Determine user system preferences and automatically adapt 3. Provide manual switching button 4. Pay attention to the performance of pictures and icons Home Web Front-end H5 Tutorial Implementing Dark Mode in Modern H5 Web Applications Implementing Dark Mode in Modern H5 Web Applications Karen Carpenter Jul 19, 2025 am 03:29 AM h5 Dark Mode To implement the dark mode of H5 web application, 1. Use CSS variables to manage the theme, define the light and dark color variables and switch dynamically; 2. judge the user system preferences, and use prefers-color-scheme to automatically adapt and store user selections; 3. Provide manual switching buttons to allow users to customize the theme and persist settings; 4. Pay attention to the performance of pictures and icons, use masks, filters or prepare dark icon resources to maintain the overall visual effect. Dark mode is now almost standard for modern H5 web applications. Users like it not only because it looks cooler, but more importantly, it is more eye-friendly in low-light environments. If you are developing or maintaining an H5 project, it is actually not difficult to implement the dark mode, but there are several key points to pay attention to. 1. Use CSS variables to manage topics The most recommended way to implement dark mode is to use CSS variables (Custom Properties). This method allows you to easily switch topics without writing two completely independent style sheets. For example, you can define a color variable like this: :root { --bg-color: #ffffff; --text-color: #333333; } .dark-mode { --bg-color: #121212; --text-color: #f5f5f5; } Then use these variables in your general style: body { background-color: var(--bg-color); color: var(--text-color); } When switching topics, you only need to dynamically add .dark-mode class to <html> or <body> . 2. Determine user system preferences and automatically adapt Many users are used to system-level dark mode settings, such as dark appearance options on iOS or Android. We can judge the user's system preferences through prefers-color-scheme media query and automatically enable dark mode. @media (prefers-color-scheme: dark) { :root { --bg-color: #121212; --text-color: #f5f5f5; } } Of course, you can also read this value through JavaScript and further process it according to the situation, such as saving user preferences to local storage. Check system preferences: window.matchMedia('(prefers-color-scheme: dark)').matches Set the default theme: If the user has not selected it, use the system preferences Storage user selection: Avoid changing back to default every refresh 3. Provide manual switching button Although automatic recognition is a good feature, users may have their own preferences. For example, they may like dark mode, but the system itself does not support it, or they want to temporarily switch to see the effect. Therefore, it is recommended to add a "Switch theme" button to the interface. The function of this button is simple: Click to switch .dark-mode class Or directly modify the class on <html> At the same time, save the user's selection into localStorage and restore it next time you open the page Sample code: const toggleBtn = document.getElementById('theme-toggle'); toggleBtn.addEventListener('click', () => { document.documentElement.classList.toggle('dark-mode'); if (document.documentElement.classList.contains('dark-mode')) { localStorage.setItem('theme', 'dark'); } else { localStorage.setItem('theme', 'light'); } }); // Read const savedTheme = localStorage.getItem('theme'); if (savedTheme === 'dark') { document.documentElement.classList.add('dark-mode'); } 4. Pay attention to the performance of pictures and icons One thing that many people tend to ignore is that in dark mode, pictures and icons may appear particularly bright, destroying the overall visual effect. There are several solutions: Add a translucent black mask to the picture Use icon version with dark background Use filter: brightness(0.8) for some images to reduce brightness Or prepare two sets of resources and change pictures when switching themes Although this point is detailed, it directly affects the user experience, especially for e-commerce and information H5 applications. Basically that's it. The key to achieving the dark mode is to have clear structure and clear logic, so don’t let the styles be confused. Make good use of CSS variables, cooperate with system detection and user preference storage, and you can create a practical and beautiful dark mode experience. The above is the detailed content of Implementing Dark Mode in Modern H5 Web Applications. For more information, please follow other related articles on the PHP Chinese website! 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