simplex-chat/website/src/_includes/navbar.html

<header class="">
    <div class="flex items-center justify-end m-auto px-4 lg:px-7 h-[66px]">
        <a href="/" class="h-full hidden dark:hidden lg:flex items-center mr-auto"><img class="w-auto h-[50px]" src="/img/new/logo-light.png" alt="logo" /></a>
        <a href="/" class="h-full hidden dark:lg:flex items-center mr-auto"><img class="w-auto h-[50px]" src="/img/new/logo-dark.png" alt="logo" /></a>
        <a href="/" class="dark:hidden lg:hidden mr-auto"><img class="h-[32px]" src="/img/new/logo-symbol-light.svg" alt="" srcset=""></a>
        <a href="/" class="hidden dark:inline-block dark:lg:hidden lg:hidden mr-auto"><img class="h-[32px]" src="/img/new/logo-symbol-dark.svg" alt="" srcset=""></a>
        
        <nav class="bg-[#F0F1F2] dark:bg-gradient-radial-mobile dark:lg:bg-none lg:bg-transparent fixed top-[66px] left-0 right-0 bottom-0 lg:top-0 lg:relative" id="menu">
            <div class="flex flex-col lg:flex-row justify-between lg:items-center gap-10 px-4 lg:px-7 h-full">
                <ul class="flex flex-col lg:flex-row lg:items-center gap-3 py-4 lg:py-0 lg:gap-10">
                    
                    <li class="nav-link relative {% if active_home %}active{% endif %}">
                        <a href="/" class="flex items-center justify-between gap-2 lg:py-5 ">
                            <span class="text-[16px] leading-[26px] tracking-[0.01em] nav-link-text text-black dark:text-white before:bg-black dark:before:bg-white">Home</span>
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                    <hr class="dark:opacity-[0.1]" >

                    <li class="nav-link relative">
                        <a href="javascript:void(0);" class="flex items-center justify-between gap-2 lg:py-5">
                            <span class="text-[16px] leading-[26px] tracking-[0.01em] text-black dark:text-white before:bg-black dark:before:bg-white">Developers</span>
                            <span href="" id="btn-mobile" class="flex items-center justify-center h-[36px] w-[36px] lg:h-auto lg:w-auto mt-1">
                                <svg class="fill-black dark:fill-white" width="10" height="6" viewBox="0 0 10 6" xmlns="http://www.w3.org/2000/svg">
                                    <path fill-rule="evenodd" clip-rule="evenodd" d="M1.50447 0.902966C1.21571 0.627397 0.747525 0.627397 0.458761 0.902966C0.169996 1.17853 0.169996 1.62532 0.458761 1.90089L4.21933 5.48961C4.25543 5.52406 4.29433 5.5542 4.33533 5.58003C4.62234 5.76088 5.01237 5.73074 5.26504 5.48961L9.02561 1.90089C9.31438 1.62532 9.31438 1.17853 9.02561 0.902966C8.73685 0.627397 8.26867 0.627397 7.97991 0.902966L4.74219 3.99273L1.50447 0.902966Z"/>
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                        <ul class="flex flex-col items-start gap-2 lg:h-fit lg:absolute lg:bg-white dark:lg:bg-black top-full lg:mt-[10px] lg:py-4 min-w-[180px] rounded-md lg:shadow-[0_0_3px_rgb(60_72_88_/_15%)] sub-menu">
                            <li><a href="https://github.com/simplex-chat/simplex-chat/blob/stable/apps/simplex-bot-advanced/Main.hs"
                                target="_blank" class="py-[10px] lg:px-[20px]"
                                >Chat bot example</a></li>
                            <li><a href="https://github.com/simplex-chat/simplex-chat/tree/stable/packages/simplex-chat-client/typescript"
                                target="_blank" class="py-[10px] lg:px-[20px]"
                                >TypeScript SDK</a></li>
                            <li><a href="https://github.com/simplex-chat/simplex-chat/blob/stable/docs/CLI.md"
                                target="_blank" class="py-[10px] lg:px-[20px]"
                                >Terminal CLI</a></li>
                            <li><a href="https://github.com/simplex-chat/simplexmq"
                                target="_blank" class="py-[10px] lg:px-[20px]"
                                >SimpleXMQ</a></li>
                            </ul>
                    </li>

                    <hr class="dark:opacity-[0.1]" >

                    <li class="nav-link relative">
                        <a href="javascript:void(0);" class="flex items-center justify-between gap-2 lg:py-5">
                            <span class="text-[16px] leading-[26px] tracking-[0.01em] text-black dark:text-white before:bg-black dark:before:bg-white">Reference</span>
                            <span href="" id="btn-mobile" class="flex items-center justify-center h-[36px] w-[36px] lg:h-auto lg:w-auto mt-1">
                                <svg class="fill-black dark:fill-white" width="10" height="6" viewBox="0 0 10 6" xmlns="http://www.w3.org/2000/svg">
                                    <path fill-rule="evenodd" clip-rule="evenodd" d="M1.50447 0.902966C1.21571 0.627397 0.747525 0.627397 0.458761 0.902966C0.169996 1.17853 0.169996 1.62532 0.458761 1.90089L4.21933 5.48961C4.25543 5.52406 4.29433 5.5542 4.33533 5.58003C4.62234 5.76088 5.01237 5.73074 5.26504 5.48961L9.02561 1.90089C9.31438 1.62532 9.31438 1.17853 9.02561 0.902966C8.73685 0.627397 8.26867 0.627397 7.97991 0.902966L4.74219 3.99273L1.50447 0.902966Z"/>
                                </svg>
                            </span>
                        </a>
                        
                        <ul class="flex flex-col items-start gap-2 lg:h-fit lg:absolute lg:bg-white dark:lg:bg-black top-full lg:mt-[10px] lg:py-4 min-w-[180px] rounded-md lg:shadow-[0_0_3px_rgb(60_72_88_/_15%)] sub-menu">
                            <li><a href="https://github.com/simplex-chat/simplexmq/blob/stable/protocol/overview-tjr.md"
                                target="_blank" class="py-[10px] lg:px-[20px]"
                                >Whitepaper</a></li>
                            <li><a href="https://github.com/simplex-chat/simplexmq/blob/stable/protocol/simplex-messaging.md"
                                target="_blank" class="py-[10px] lg:px-[20px]"
                                >SMP protocol</a></li>
                            <li><a href="https://github.com/simplex-chat/simplex-chat/blob/stable/docs/protocol/simplex-chat.md"
                                target="_blank" class="py-[10px] lg:px-[20px]"
                                >Chat protocol</a></li>
                        </ul>
                    </li>

                    <hr class="dark:opacity-[0.1]" >

                    <li class="nav-link relative {% if active_blog %}active{% endif %}">
                        <a href="/blog" class="flex items-center justify-between gap-2 lg:py-5">
                            <span class="text-[16px] leading-[26px] tracking-[0.01em] nav-link-text text-black dark:text-white before:bg-black dark:before:bg-white">Blog</span>
                        </a>
                    </li>
                </ul>

                <a href="https://github.com/simplex-chat/simplex-chat#help-us-with-donations"
                    target="_blank" class="inline-block self-center text-white dark:text-black text-[16px] font-medium tracking-[0.02em] rounded-[34px] bg-primary-light dark:bg-primary-dark py-3 lg:py-2 px-20 lg:px-5 mb-16 lg:mb-0"
                    >Donate</a>

                <div class=" inline-block self-center dark:hidden mr-[-36px] mt-[8px]">
                    <a class="github-button" href="https://github.com/simplex-chat/simplex-chat" data-size="large"
                        data-show-count="true" aria-label="Star simplex-chat on GitHub">Star</a>
                </div>

                <div class="inline-block self-center hidden dark:block mr-[-36px] mt-[8px]">
                    <a class="github-button" href="https://github.com/simplex-chat/simplex-chat" data-size="large"
                        data-color-scheme="no-preference: dark; light: dark; dark: dark;"
                        data-show-count="true" aria-label="Star simplex-chat on GitHub">Star</a>
                </div>
            </div>
        </nav>

        <button href="#" class="flex items-center justify-center h-[36px] w-[36px] ml-10 theme-switch-btn">
            <img src="/img/new/sun.svg"  alt="" srcset="" class="sun">
            <img src="/img/new/moon.svg" alt="" srcset="" class="moon">
        </button>

        <button href="" id="btn-mobile" class="flex lg:hidden items-center justify-center h-[36px] w-[36px] ml-10 nav-toggle-btn">
            <img src="/img/new/hamburger.svg" id="hamburger" alt="" srcset="">
            <svg class="fill-black dark:fill-white hidden" id="cross" width="13" height="13" viewBox="0 0 13 13" xmlns="http://www.w3.org/2000/svg">
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            </svg>
        </button>
    </div>
</header>


<SCript>
// switch theme
const sunIcon = document.querySelector('.sun');
const moonIcon = document.querySelector('.moon');

const userTheme = localStorage.getItem('theme');
const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;

const iconToggle = () => {
    sunIcon.classList.toggle('hidden');
    moonIcon.classList.toggle('hidden');
}

const themeCheck = () => {
    if(userTheme === 'dark' || (!userTheme && systemTheme)){
        document.documentElement.classList.add('dark');
        moonIcon.classList.add('hidden');
    }
    else{
        sunIcon.classList.add('hidden');
    }
}

const themeSwitch = () => {
    if(document.documentElement.classList.contains('dark')){
        document.documentElement.classList.remove('dark');
        localStorage.setItem('theme','light');
        iconToggle();
    }
    else{
        document.documentElement.classList.add('dark');
        localStorage.setItem('theme','dark');
        iconToggle();
    }
}

const nav = document.querySelector('header nav');
window.addEventListener('click',(e)=>{
    if(e.target.closest('.nav-link')){
        if(e.target.closest('.nav-link').classList.contains('active')){
            e.target.closest('.nav-link').classList.remove('active');
        }
        else{
            document.querySelectorAll('.nav-link').forEach(el => el.classList.remove('active'))
            e.target.closest('.nav-link').classList.add('active');
        }
    }
    else if(e.target.closest('.nav-toggle-btn')){
        document.body.classList.toggle('lock-scroll');
        if(nav.classList.contains('open')){
            nav.classList.remove('open');
            document.getElementById('hamburger').classList.remove('hidden');
            document.getElementById('cross').classList.add('hidden');
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        else{
            nav.classList.add('open');
            document.getElementById('hamburger').classList.add('hidden');
            document.getElementById('cross').classList.remove('hidden');
        }
    }
    else if(e.target.closest('.theme-switch-btn')){
        themeSwitch();
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})

themeCheck();

const changeHeaderBg = ()=>{
    const header = document.querySelector('header')
    const scrollValue = window.scrollY
    if(scrollValue > 5){
        header.classList.add('bg-primary-bg-light');
        header.classList.add('dark:bg-primary-bg-dark');
    }
    else{
        header.classList.remove('bg-primary-bg-light');
        header.classList.remove('dark:bg-primary-bg-dark');
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}

window.addEventListener('scroll',changeHeaderBg);
</SCript>