casper/index.hbs

{{!< default}}
{{!-- The tag above means: insert everything in this file
into the {body} of the default.hbs template --}}

<header class="site-home-header">
    {{> header-background background=@site.cover_image}} {{!--Special header-image.hbs partial to generate the background image--}}
        <div class="inner">
            {{> "site-nav"}}
            <div class="site-header-content">
                <h1 class="site-title">
                    {{#if @site.logo}}
                        <img class="site-logo" src="{{img_url @site.logo size="l"}}" alt="{{@site.title}}" />
                    {{else}}
                        {{@site.title}}
                    {{/if}}
                </h1>
                <h2 class="site-description">{{@site.description}}</h2>
            </div>
        </div>
    </div>
</header>

{{!-- The main content area --}}
<main id="site-main" class="site-main outer">
    <div class="inner posts">

        <div class="post-feed">
            {{#foreach posts}}

                {{!-- The tag below includes the markup for each post - partials/post-card.hbs --}}
                {{> "post-card"}}

            {{/foreach}}
        </div>

    </div>
</main>

{{> site-header}}

{{!-- The #contentFor helper here will send everything inside it up to the matching #block helper found in default.hbs --}}
{{#contentFor "scripts"}}
<script>

    // NOTE: Scroll performance is poor in Safari
    // - this appears to be due to the events firing much more slowly in Safari.
    //   Dropping the scroll event and using only a raf loop results in smoother
    //   scrolling but continuous processing even when not scrolling
    $(document).ready(function () {
        
        var nav = document.querySelector('.site-nav-main .site-nav');
        var feed = document.querySelector('.post-feed');

        var lastScrollY = window.scrollY;
        var lastWindowHeight = window.innerHeight;
        var lastDocumentHeight = $(document).height();
        var ticking = false;

        function onScroll() {
            lastScrollY = window.scrollY;
            requestTick();
        }

        function onResize() {
            lastWindowHeight = window.innerHeight;
            lastDocumentHeight = $(document).height();
            requestTick();
        }

        function requestTick() {
            if (!ticking) {
                requestAnimationFrame(update);
            }
            ticking = true;
        }

        function update() {
            var trigger = feed.getBoundingClientRect().top + window.scrollY;
            var progressMax = lastDocumentHeight - lastWindowHeight;

            // show/hide nav
            if (lastScrollY >= trigger - 20) {
                nav.classList.add('fixed-nav-active');
            } else {
                nav.classList.remove('fixed-nav-active');
            }

            ticking = false;
        }

        window.addEventListener('scroll', onScroll, { passive: true });
        window.addEventListener('resize', onResize, false);

        update();

    });
</script>
{{/contentFor}}