Encode code into url to make sharing snippets easy

resolves #253

web/src/helpers/clipboard.js

@@ -0,0 +1,37 @@
+function fallbackCopyTextToClipboard(text) {
+  var textArea = document.createElement('textarea')
+  textArea.value = text
+
+  // Avoid scrolling to bottom
+  textArea.style.top = '0'
+  textArea.style.left = '0'
+  textArea.style.position = 'fixed'
+
+  document.body.appendChild(textArea)
+  textArea.focus()
+  textArea.select()
+
+  try {
+    var successful = document.execCommand('copy')
+    var msg = successful ? 'successful' : 'unsuccessful'
+    console.log('Fallback: Copying text command was ' + msg)
+  } catch (err) {
+    console.error('Fallback: Oops, unable to copy', err)
+  }
+
+  document.body.removeChild(textArea)
+}
+export function copyTextToClipboard(text) {
+  if (!navigator.clipboard) {
+    fallbackCopyTextToClipboard(text)
+    return
+  }
+  navigator.clipboard.writeText(text).then(
+    function () {
+      console.log('Async: Copying to clipboard was successful!')
+    },
+    function (err) {
+      console.error('Async: Could not copy text: ', err)
+    }
+  )
+}