masonry layout works

db/topics.csv

@@ -4,3 +4,7 @@ mathematics,Maths,,physics,
 language.english,English
 programming.java,Java,,,,
 history,History,,language.english,
+programming.java,Ruby,,,,
+programming.java,Rust,,,,
+programming.java,JS,,,,
+programming.java,Golang,,,,

src/FormatList.svelte

@@ -1,34 +1,29 @@
 <script>
-    let dataPromise = getData();
-    async function getData() {
-        const res = await fetch(`/learn.json?_shape=array&sql=select+distinct(substr(links%2C1%2Cinstr(links%2C'|')-1))+as+name+from+items`)
-        if(res.ok){
-            return await res.json();
-        } else {
-            throw new Error()
-        }
-    }
+
 
 </script>
 
-{#await dataPromise}
-<p>Fetching data...</p>
-{:then formats}
-
-<div class="mt-6" style="columns: 6 240px; column-gap: 1rem;">
-    {#each formats as format}
-    <div tabindex="0" class="inline-block w-full mt-4 bg-white rounded-lg mt-4 px-4 py-4 shadow-lg focus:outline-none">
-        <a href="#/format/{format.name}"><h4 class="mt-1 p-1 text-gray-900 font-semibold text-lg">{ format.name }</h4></a>
-    
-        <div class="mt-2 flex flex-wrap text-sm text-gray-900">
-        </div>
-    
-        <p class="mt-2 text-sm text-right"><span>and 37 more.</span></p>
+<div class="max-w-lg mx-auto grid gap-5 lg:grid-cols-3 lg:max-w-none">
 
+<a href="#/format/podcast" class="flex flex-col rounded-lg shadow-lg overflow-hidden transform transition ease-out duration-300 hover:scale-105 hover:shadow-xl">
+    <div class="flex-shrink-0">
+    <img class="h-48 w-full object-cover" src="https://images.unsplash.com/photo-1496128858413-b36217c2ce36?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1679&q=80" alt="">
     </div>
-    {/each}
-</div>
+    <h1 class="text-2xl font-bold p-2 bg-indigo-500 text-white">Podcasts</h1>
+</a>
 
-{:catch error}
-<p>{error.message}</p>
-{/await}
+<a href="#/format/book" class="flex flex-col rounded-lg shadow-lg overflow-hidden transform transition ease-out duration-300 hover:scale-105 hover:shadow-xl">
+    <div class="flex-shrink-0">
+    <img class="h-48 w-full object-cover" src="https://images.unsplash.com/photo-1547586696-ea22b4d4235d?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1679&q=80" alt="">
+    </div>
+    <h1 class="text-2xl font-bold p-2 bg-indigo-500 text-white">Books</h1>
+</a>
+
+<a href="#/format/video" class="flex flex-col rounded-lg shadow-lg overflow-hidden transform transition ease-out duration-300 hover:scale-105 hover:shadow-xl">
+    <div class="flex-shrink-0">
+    <img class="h-48 w-full object-cover" src="https://images.unsplash.com/photo-1492724441997-5dc865305da7?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1679&q=80" alt="">
+    </div>
+    <h1 class="text-2xl font-bold p-2 bg-indigo-500 text-white">Videos</h1>
+</a>
+
+</div>

src/Masonry.svelte

@@ -0,0 +1,136 @@
+<!-- 
+    From https://svelte.dev/repl/d5ff70834832498882d1570b9355561e?version=3.24.1
+	An almost direct copy and paste of: https://css-tricks.com/a-lightweight-masonry-solution
+	Usage:
+		- stretchFirst stretches the first item across the top
+  <Masonry stretchFirst={true} >
+    {#each data as o}
+      <div class="_card _padding">
+        Here's some stuff {o.name}
+        <header>
+          <h3>{o.name}</h3>
+        </header>
+        <section>
+          <p>{o.text}</p> 
+        </section>
+      </div>
+    {/each}
+  </Masonry>
+ -->
+
+
+
+ <div bind:this={masonryElement} 
+ class={`__grid--masonry ${stretchFirst ? '__stretch-first' : ''}`}
+ style={`--grid-gap: ${gridGap}; --col-width: ${colWidth};`}
+ >
+<slot></slot>
+</div>
+
+
+
+<script>
+import { onMount, onDestroy, getContext, setContext, tick } from 'svelte'
+export let  stretchFirst = false,
+        gridGap = '0.5em',
+        colWidth = 'minmax(Min(20em, 100%), 1fr)',
+                    items = [] // pass in data if it's dynamically updated
+let grids = [], masonryElement
+
+const refreshLayout = async () => {
+grids.forEach(async grid => {
+/* get the post relayout number of columns */
+let ncol = getComputedStyle(grid._el).gridTemplateColumns.split(' ').length
+    
+grid.items.forEach(c => {
+  let new_h = c.getBoundingClientRect().height;
+  
+  if(new_h !== +c.dataset.h) {
+    c.dataset.h = new_h
+    grid.mod++
+  }
+});
+
+/* if the number of columns has changed */
+if(grid.ncol !== ncol || grid.mod) {
+  /* update number of columns */ 
+  grid.ncol = ncol;
+  /* revert to initial positioning, no margin */
+  grid.items.forEach(c => c.style.removeProperty('margin-top'))
+  /* if we have more than one column */
+  if(grid.ncol > 1) {
+    grid.items.slice(ncol).forEach((c, i) => {
+      let prev_fin = grid.items[i].getBoundingClientRect().bottom /* bottom edge of item above */, 
+            curr_ini = c.getBoundingClientRect().top /* top edge of current item */;
+      
+      c.style.marginTop = `${prev_fin + grid.gap - curr_ini}px`
+    })
+  }
+  
+  grid.mod = 0
+}
+})
+}
+
+const calcGrid = async (_masonryArr) => {
+await tick()
+if(_masonryArr.length && getComputedStyle(_masonryArr[0]).gridTemplateRows !== 'masonry') {
+grids = _masonryArr.map(grid => {
+            return {
+                _el: grid, 
+                gap: parseFloat(getComputedStyle(grid).gridRowGap),
+                items: [...grid.childNodes].filter(c => c.nodeType === 1 && +getComputedStyle(c).gridColumnEnd !== -1), 
+                ncol: 0, 
+                mod: 0
+            }
+    })
+refreshLayout() /* initial load */
+}
+}
+
+
+
+
+let _window
+onMount(() => {
+_window = window
+_window.addEventListener('resize', refreshLayout, false) /* on resize */
+})
+onDestroy(() => {
+if(_window) {
+  _window.removeEventListener('resize', refreshLayout, false) /* on resize */
+}
+})
+
+
+$: if(masonryElement) {
+calcGrid([masonryElement])
+}
+
+$: if(items) { // update if items are changed
+masonryElement = masonryElement // refresh masonryElement
+}
+</script>
+
+<!-- 
+$w: var(--col-width); // minmax(Min(20em, 100%), 1fr);
+$s: var(--grid-gap); // .5em;
+-->
+
+<style>
+:global(.__grid--masonry) {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, var(--col-width));
+  grid-template-rows: masonry;
+  justify-content: center;
+  grid-gap: var(--grid-gap);
+  padding: var(--grid-gap);
+  
+}
+:global(.__grid--masonry > *) { 
+    align-self: start 
+}
+:global(.__grid--masonry.__stretch-first > *:first-child) { 
+  grid-column: 1/ -1;
+}
+</style>

src/TopicList.svelte

@@ -1,5 +1,6 @@
 <script>
     import TopicCard from "./TopicCard.svelte"
+    import Masonry from './Masonry.svelte'
 
     let dataPromise = getData();
     async function getData() {
@@ -24,13 +25,14 @@
     }
 </script>
 
+
 {#await dataPromise}
 <p>Fetching data...</p>
 {:then topics}
 
-<div class="mt-6" style="columns: 6 240px; column-gap: 1rem;">
+<Masonry gridGap={'0.75rem'}>
     {#each [...hierarchy(topics).keys()] as parent}
-    <div tabindex="0" class="inline-block w-full mt-4 bg-white rounded-lg mt-4 px-4 py-4 shadow-lg focus:outline-none">
+    <div class="bg-white rounded-lg px-4 py-4 shadow-lg focus:outline-none">
         <h4 class="mt-1 p-1 text-gray-900 font-semibold text-lg">{ parent.display_name }</h4>
     
         <div class="mt-2 flex flex-wrap text-sm text-gray-900">
@@ -38,12 +40,9 @@
             <a href={"#/topic/" + child.id} class="text-purple-600 no-underline hover:underline hover:text-purple-900 px-2">{child.display_name}</a>
         {/each}
         </div>    
-    
-        <p class="mt-2 text-sm text-right"><span>and 37 more.</span></p>
-    
     </div>
     {/each}
-</div>
+</Masonry>
 
 {:catch error}
 <p>{error.message}</p>

static/bundle.css

@@ -1 +1,3 @@
-h1.svelte-b0hmqh{background-color:yellow}
+.__grid--masonry{display:grid;grid-template-columns:repeat(auto-fit, var(--col-width));grid-template-rows:masonry;justify-content:center;grid-gap:var(--grid-gap);padding:var(--grid-gap)}.__grid--masonry > *{align-self:start 
+}.__grid--masonry.__stretch-first > *:first-child{grid-column:1/ -1}._padding.svelte-1wlh87t{padding:12px}._card.svelte-1wlh87t{border:1px solid #ccc
+      }._sticky.svelte-1wlh87t{position:sticky;top:12px}