PR: Phoenix LiveView Drag-and-Drop Example

.formatter.exs

@@ -0,0 +1,6 @@
+[
+  plugins: [Phoenix.LiveView.HTMLFormatter],
+  inputs: ["*.{heex,ex,exs}", "priv/*/seeds.exs", "{config,lib,test}/**/*.{heex,ex,exs}"],
+  import_deps: [:ecto, :phoenix],
+  subdirectories: ["priv/*/migrations"]
+]

.gitignore

@@ -102,3 +102,40 @@ dist
 
 # TernJS port file
 .tern-port
+
+package-lock.json
+
+# Phoenix gitignore values
+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where 3rd-party dependencies like ExDoc output generated docs.
+/doc/
+
+# Ignore .fetch files in case you like to edit your project deps locally.
+/.fetch
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+app-*.tar
+
+# Ignore assets that are produced by build tools.
+/priv/static/assets/
+
+# Ignore digested assets cache.
+/priv/static/cache_manifest.json
+
+# In case you use Node.js/npm, you want to ignore these.
+npm-debug.log
+/assets/node_modules/

README.md

@@ -88,4 +88,12 @@ Once you have a basic understanding of how Alpine.js's directives work.
 checkout our Stopwatch example:
 https://dwyl.github.io/learn-alpine.js/stopwatch.html
 
-Code: [**`stopwatch.html`**](https://github.com/dwyl/learn-alpine.js/blob/main/stopwatch.html)
+Code: [**`stopwatch.html`**](https://github.com/dwyl/learn-alpine.js/blob/main/stopwatch.html)
+
+### Drag and drop
+
+Along the nodejs application used for the sotopwatch example,
+we have created a Phoenix application to test see how drag-and-drop
+can be implemented using Alpinejs.
+
+See [drag-and-drop.md](drag-and-drop.md)

assets/css/app.css

@@ -0,0 +1,132 @@
+/* This file is for your main application CSS */
+@import "./phoenix.css";
+
+/* Alerts and form errors used by phx.new */
+.alert {
+  padding: 15px;
+  margin-bottom: 20px;
+  border: 1px solid transparent;
+  border-radius: 4px;
+}
+.alert-info {
+  color: #31708f;
+  background-color: #d9edf7;
+  border-color: #bce8f1;
+}
+.alert-warning {
+  color: #8a6d3b;
+  background-color: #fcf8e3;
+  border-color: #faebcc;
+}
+.alert-danger {
+  color: #a94442;
+  background-color: #f2dede;
+  border-color: #ebccd1;
+}
+.alert p {
+  margin-bottom: 0;
+}
+.alert:empty {
+  display: none;
+}
+.invalid-feedback {
+  color: #a94442;
+  display: block;
+  margin: -1rem 0 2rem;
+}
+
+/* LiveView specific classes for your customization */
+.phx-no-feedback.invalid-feedback,
+.phx-no-feedback .invalid-feedback {
+  display: none;
+}
+
+.phx-click-loading {
+  opacity: 0.5;
+  transition: opacity 1s ease-out;
+}
+
+.phx-loading{
+  cursor: wait;
+}
+
+.phx-modal {
+  opacity: 1!important;
+  position: fixed;
+  z-index: 1;
+  left: 0;
+  top: 0;
+  width: 100%;
+  height: 100%;
+  overflow: auto;
+  background-color: rgba(0,0,0,0.4);
+}
+
+.phx-modal-content {
+  background-color: #fefefe;
+  margin: 15vh auto;
+  padding: 20px;
+  border: 1px solid #888;
+  width: 80%;
+}
+
+.phx-modal-close {
+  color: #aaa;
+  float: right;
+  font-size: 28px;
+  font-weight: bold;
+}
+
+.phx-modal-close:hover,
+.phx-modal-close:focus {
+  color: black;
+  text-decoration: none;
+  cursor: pointer;
+}
+
+.fade-in-scale {
+  animation: 0.2s ease-in 0s normal forwards 1 fade-in-scale-keys;
+}
+
+.fade-out-scale {
+  animation: 0.2s ease-out 0s normal forwards 1 fade-out-scale-keys;
+}
+
+.fade-in {
+  animation: 0.2s ease-out 0s normal forwards 1 fade-in-keys;
+}
+.fade-out {
+  animation: 0.2s ease-out 0s normal forwards 1 fade-out-keys;
+}
+
+@keyframes fade-in-scale-keys{
+  0% { scale: 0.95; opacity: 0; }
+  100% { scale: 1.0; opacity: 1; }
+}
+
+@keyframes fade-out-scale-keys{
+  0% { scale: 1.0; opacity: 1; }
+  100% { scale: 0.95; opacity: 0; }
+}
+
+@keyframes fade-in-keys{
+  0% { opacity: 0; }
+  100% { opacity: 1; }
+}
+
+@keyframes fade-out-keys{
+  0% { opacity: 1; }
+  100% { opacity: 0; }
+}
+
+.cursor-grab{
+  cursor: grab;
+}
+
+.cursor-grabbing{
+  cursor: grabbing; 
+}
+
+.bg-yellow-300{
+  background-color: rgb(253 224 71);
+}

assets/css/phoenix.css

@@ -0,0 +1,101 @@
+/* Includes some default style for the starter application.
+ * This can be safely deleted to start fresh.
+ */
+
+/* Milligram v1.4.1 https://milligram.github.io
+ * Copyright (c) 2020 CJ Patoilo Licensed under the MIT license
+ */
+
+*,*:after,*:before{box-sizing:inherit}html{box-sizing:border-box;font-size:62.5%}body{color:#000000;font-family:'Helvetica Neue', 'Helvetica', 'Arial', sans-serif;font-size:1.6em;font-weight:300;letter-spacing:.01em;line-height:1.6}blockquote{border-left:0.3rem solid #d1d1d1;margin-left:0;margin-right:0;padding:1rem 1.5rem}blockquote *:last-child{margin-bottom:0}.button,button,input[type='button'],input[type='reset'],input[type='submit']{background-color:#0069d9;border:0.1rem solid #0069d9;border-radius:.4rem;color:#fff;cursor:pointer;display:inline-block;font-size:1.1rem;font-weight:700;height:3.8rem;letter-spacing:.1rem;line-height:3.8rem;padding:0 3.0rem;text-align:center;text-decoration:none;text-transform:uppercase;white-space:nowrap}.button:focus,.button:hover,button:focus,button:hover,input[type='button']:focus,input[type='button']:hover,input[type='reset']:focus,input[type='reset']:hover,input[type='submit']:focus,input[type='submit']:hover{background-color:#606c76;border-color:#606c76;color:#fff;outline:0}.button[disabled],button[disabled],input[type='button'][disabled],input[type='reset'][disabled],input[type='submit'][disabled]{cursor:default;opacity:.5}.button[disabled]:focus,.button[disabled]:hover,button[disabled]:focus,button[disabled]:hover,input[type='button'][disabled]:focus,input[type='button'][disabled]:hover,input[type='reset'][disabled]:focus,input[type='reset'][disabled]:hover,input[type='submit'][disabled]:focus,input[type='submit'][disabled]:hover{background-color:#0069d9;border-color:#0069d9}.button.button-outline,button.button-outline,input[type='button'].button-outline,input[type='reset'].button-outline,input[type='submit'].button-outline{background-color:transparent;color:#0069d9}.button.button-outline:focus,.button.button-outline:hover,button.button-outline:focus,button.button-outline:hover,input[type='button'].button-outline:focus,input[type='button'].button-outline:hover,input[type='reset'].button-outline:focus,input[type='reset'].button-outline:hover,input[type='submit'].button-outline:focus,input[type='submit'].button-outline:hover{background-color:transparent;border-color:#606c76;color:#606c76}.button.button-outline[disabled]:focus,.button.button-outline[disabled]:hover,button.button-outline[disabled]:focus,button.button-outline[disabled]:hover,input[type='button'].button-outline[disabled]:focus,input[type='button'].button-outline[disabled]:hover,input[type='reset'].button-outline[disabled]:focus,input[type='reset'].button-outline[disabled]:hover,input[type='submit'].button-outline[disabled]:focus,input[type='submit'].button-outline[disabled]:hover{border-color:inherit;color:#0069d9}.button.button-clear,button.button-clear,input[type='button'].button-clear,input[type='reset'].button-clear,input[type='submit'].button-clear{background-color:transparent;border-color:transparent;color:#0069d9}.button.button-clear:focus,.button.button-clear:hover,button.button-clear:focus,button.button-clear:hover,input[type='button'].button-clear:focus,input[type='button'].button-clear:hover,input[type='reset'].button-clear:focus,input[type='reset'].button-clear:hover,input[type='submit'].button-clear:focus,input[type='submit'].button-clear:hover{background-color:transparent;border-color:transparent;color:#606c76}.button.button-clear[disabled]:focus,.button.button-clear[disabled]:hover,button.button-clear[disabled]:focus,button.button-clear[disabled]:hover,input[type='button'].button-clear[disabled]:focus,input[type='button'].button-clear[disabled]:hover,input[type='reset'].button-clear[disabled]:focus,input[type='reset'].button-clear[disabled]:hover,input[type='submit'].button-clear[disabled]:focus,input[type='submit'].button-clear[disabled]:hover{color:#0069d9}code{background:#f4f5f6;border-radius:.4rem;font-size:86%;margin:0 .2rem;padding:.2rem .5rem;white-space:nowrap}pre{background:#f4f5f6;border-left:0.3rem solid #0069d9;overflow-y:hidden}pre>code{border-radius:0;display:block;padding:1rem 1.5rem;white-space:pre}hr{border:0;border-top:0.1rem solid #f4f5f6;margin:3.0rem 0}input[type='color'],input[type='date'],input[type='datetime'],input[type='datetime-local'],input[type='email'],input[type='month'],input[type='number'],input[type='password'],input[type='search'],input[type='tel'],input[type='text'],input[type='url'],input[type='week'],input:not([type]),textarea,select{-webkit-appearance:none;background-color:transparent;border:0.1rem solid #d1d1d1;border-radius:.4rem;box-shadow:none;box-sizing:inherit;height:3.8rem;padding:.6rem 1.0rem .7rem;width:100%}input[type='color']:focus,input[type='date']:focus,input[type='datetime']:focus,input[type='datetime-local']:focus,input[type='email']:focus,input[type='month']:focus,input[type='number']:focus,input[type='password']:focus,input[type='search']:focus,input[type='tel']:focus,input[type='text']:focus,input[type='url']:focus,input[type='week']:focus,input:not([type]):focus,textarea:focus,select:focus{border-color:#0069d9;outline:0}select{background:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 30 8" width="30"><path fill="%23d1d1d1" d="M0,0l6,8l6-8"/></svg>') center right no-repeat;padding-right:3.0rem}select:focus{background-image:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 30 8" width="30"><path fill="%230069d9" d="M0,0l6,8l6-8"/></svg>')}select[multiple]{background:none;height:auto}textarea{min-height:6.5rem}label,legend{display:block;font-size:1.6rem;font-weight:700;margin-bottom:.5rem}fieldset{border-width:0;padding:0}input[type='checkbox'],input[type='radio']{display:inline}.label-inline{display:inline-block;font-weight:normal;margin-left:.5rem}.container{margin:0 auto;max-width:112.0rem;padding:0 2.0rem;position:relative;width:100%}.row{display:flex;flex-direction:column;padding:0;width:100%}.row.row-no-padding{padding:0}.row.row-no-padding>.column{padding:0}.row.row-wrap{flex-wrap:wrap}.row.row-top{align-items:flex-start}.row.row-bottom{align-items:flex-end}.row.row-center{align-items:center}.row.row-stretch{align-items:stretch}.row.row-baseline{align-items:baseline}.row .column{display:block;flex:1 1 auto;margin-left:0;max-width:100%;width:100%}.row .column.column-offset-10{margin-left:10%}.row .column.column-offset-20{margin-left:20%}.row .column.column-offset-25{margin-left:25%}.row .column.column-offset-33,.row .column.column-offset-34{margin-left:33.3333%}.row .column.column-offset-40{margin-left:40%}.row .column.column-offset-50{margin-left:50%}.row .column.column-offset-60{margin-left:60%}.row .column.column-offset-66,.row .column.column-offset-67{margin-left:66.6666%}.row .column.column-offset-75{margin-left:75%}.row .column.column-offset-80{margin-left:80%}.row .column.column-offset-90{margin-left:90%}.row .column.column-10{flex:0 0 10%;max-width:10%}.row .column.column-20{flex:0 0 20%;max-width:20%}.row .column.column-25{flex:0 0 25%;max-width:25%}.row .column.column-33,.row .column.column-34{flex:0 0 33.3333%;max-width:33.3333%}.row .column.column-40{flex:0 0 40%;max-width:40%}.row .column.column-50{flex:0 0 50%;max-width:50%}.row .column.column-60{flex:0 0 60%;max-width:60%}.row .column.column-66,.row .column.column-67{flex:0 0 66.6666%;max-width:66.6666%}.row .column.column-75{flex:0 0 75%;max-width:75%}.row .column.column-80{flex:0 0 80%;max-width:80%}.row .column.column-90{flex:0 0 90%;max-width:90%}.row .column .column-top{align-self:flex-start}.row .column .column-bottom{align-self:flex-end}.row .column .column-center{align-self:center}@media (min-width: 40rem){.row{flex-direction:row;margin-left:-1.0rem;width:calc(100% + 2.0rem)}.row .column{margin-bottom:inherit;padding:0 1.0rem}}a{color:#0069d9;text-decoration:none}a:focus,a:hover{color:#606c76}dl,ol,ul{list-style:none;margin-top:0;padding-left:0}dl dl,dl ol,dl ul,ol dl,ol ol,ol ul,ul dl,ul ol,ul ul{font-size:90%;margin:1.5rem 0 1.5rem 3.0rem}ol{list-style:decimal inside}ul{list-style:circle inside}.button,button,dd,dt,li{margin-bottom:1.0rem}fieldset,input,select,textarea{margin-bottom:1.5rem}blockquote,dl,figure,form,ol,p,pre,table,ul{margin-bottom:2.5rem}table{border-spacing:0;display:block;overflow-x:auto;text-align:left;width:100%}td,th{border-bottom:0.1rem solid #e1e1e1;padding:1.2rem 1.5rem}td:first-child,th:first-child{padding-left:0}td:last-child,th:last-child{padding-right:0}@media (min-width: 40rem){table{display:table;overflow-x:initial}}b,strong{font-weight:bold}p{margin-top:0}h1,h2,h3,h4,h5,h6{font-weight:300;letter-spacing:-.1rem;margin-bottom:2.0rem;margin-top:0}h1{font-size:4.6rem;line-height:1.2}h2{font-size:3.6rem;line-height:1.25}h3{font-size:2.8rem;line-height:1.3}h4{font-size:2.2rem;letter-spacing:-.08rem;line-height:1.35}h5{font-size:1.8rem;letter-spacing:-.05rem;line-height:1.5}h6{font-size:1.6rem;letter-spacing:0;line-height:1.4}img{max-width:100%}.clearfix:after{clear:both;content:' ';display:table}.float-left{float:left}.float-right{float:right}
+
+/* General style */
+h1{font-size: 3.6rem; line-height: 1.25}
+h2{font-size: 2.8rem; line-height: 1.3}
+h3{font-size: 2.2rem; letter-spacing: -.08rem; line-height: 1.35}
+h4{font-size: 1.8rem; letter-spacing: -.05rem; line-height: 1.5}
+h5{font-size: 1.6rem; letter-spacing: 0; line-height: 1.4}
+h6{font-size: 1.4rem; letter-spacing: 0; line-height: 1.2}
+pre{padding: 1em;}
+
+.container{
+  margin: 0 auto;
+  max-width: 80.0rem;
+  padding: 0 2.0rem;
+  position: relative;
+  width: 100%
+}
+select {
+  width: auto;
+}
+
+/* Phoenix promo and logo */
+.phx-hero {
+  text-align: center;
+  border-bottom: 1px solid #e3e3e3;
+  background: #eee;
+  border-radius: 6px;
+  padding: 3em 3em 1em;
+  margin-bottom: 3rem;
+  font-weight: 200;
+  font-size: 120%;
+}
+.phx-hero input {
+  background: #ffffff;
+}
+.phx-logo {
+  min-width: 300px;
+  margin: 1rem;
+  display: block;
+}
+.phx-logo img {
+  width: auto;
+  display: block;
+}
+
+/* Headers */
+header {
+  width: 100%;
+  background: #fdfdfd;
+  border-bottom: 1px solid #eaeaea;
+  margin-bottom: 2rem;
+}
+header section {
+  align-items: center;
+  display: flex;
+  flex-direction: column;
+  justify-content: space-between;
+}
+header section :first-child {
+  order: 2;
+}
+header section :last-child {
+  order: 1;
+}
+header nav ul,
+header nav li {
+  margin: 0;
+  padding: 0;
+  display: block;
+  text-align: right;
+  white-space: nowrap;
+}
+header nav ul {
+  margin: 1rem;
+  margin-top: 0;
+}
+header nav a {
+  display: block;
+}
+
+@media (min-width: 40.0rem) { /* Small devices (landscape phones, 576px and up) */
+  header section {
+    flex-direction: row;
+  }
+  header nav ul {
+    margin: 1rem;
+  }
+  .phx-logo {
+    flex-basis: 527px;
+    margin: 2rem 1rem;
+  }
+}