improve user password reset

app/javascript/elements/visible_on_input.js

@@ -0,0 +1,14 @@
+export default class extends HTMLElement {
+  connectedCallback () {
+    this.input = document.getElementById(this.dataset.inputId)
+
+    this.input.addEventListener('input', () => {
+      if (this.input.value.trim().length > 0) {
+        this.classList.remove('hidden')
+      } else {
+        this.classList.add('hidden')
+        this.querySelectorAll('input').forEach(input => { input.value = '' })
+      }
+    })
+  }
+}