more normalization and copy button

assets/js/app.js

@@ -20,10 +20,7 @@ import {LiveSocket} from "phoenix_live_view"
 let Hooks = {}
 Hooks.SnippetInput = {
   updated(){
-    // + cursor reposition logic
-    // console.log(['dings', this.el.dataset])
     this.el.value = this.el.dataset.updatedVal
-    // this.el.select()
   }
 }
 
@@ -41,3 +38,13 @@ liveSocket.connect()
 // >> liveSocket.enableDebug()
 // >> liveSocket.enableLatencySim(1000)
 window.liveSocket = liveSocket
+
+document.querySelector("button[id='copy-button']").onclick = function(){
+  var ta = document.querySelector("textarea[name='snippet']")
+  var start = ta.selectionStart
+  var end = ta.selectionEnd
+  ta.select()
+  document.execCommand("copy");
+  ta.selectionStart = start
+  ta.selectionEnd = end
+}