allow to view password during registration

app/javascript/application.js

@@ -24,6 +24,7 @@ import SubmitForm from './elements/submit_form'
 import PromptPassword from './elements/prompt_password'
 import EmailsTextarea from './elements/emails_textarea'
 import ToggleOnSubmit from './elements/toggle_on_submit'
+import PasswordInput from './elements/password_input'
 
 import * as TurboInstantClick from './lib/turbo_instant_click'
 
@@ -85,6 +86,7 @@ safeRegisterElement('prompt-password', PromptPassword)
 safeRegisterElement('emails-textarea', EmailsTextarea)
 safeRegisterElement('toggle-cookies', ToggleCookies)
 safeRegisterElement('toggle-on-submit', ToggleOnSubmit)
+safeRegisterElement('password-input', PasswordInput)
 
 safeRegisterElement('template-builder', class extends HTMLElement {
   connectedCallback () {

app/javascript/elements/password_input.js

@@ -0,0 +1,35 @@
+import { target, targetable } from '@github/catalyst/lib/targetable'
+
+export default targetable(class extends HTMLElement {
+  static [target.static] = [
+    'visiblePasswordIcon',
+    'hiddenPasswordIcon',
+    'passwordInput',
+    'togglePasswordVisibility'
+  ]
+
+  connectedCallback () {
+    this.togglePasswordVisibility.addEventListener('click', this.handleTogglePasswordVisibility)
+    document.addEventListener('turbo:submit-start', this.setInitialPasswordType)
+  }
+
+  disconnectedCallback () {
+    this.togglePasswordVisibility.removeEventListener('click', this.handleTogglePasswordVisibility)
+    document.removeEventListener('turbo:submit-start', this.setInitialPasswordType)
+  }
+
+  handleTogglePasswordVisibility = () => {
+    this.passwordInput.type = this.passwordInput.type === 'password' ? 'text' : 'password'
+    this.toggleIcon()
+  }
+
+  setInitialPasswordType = () => {
+    this.passwordInput.type = 'password'
+    this.toggleIcon()
+  }
+
+  toggleIcon = () => {
+    this.visiblePasswordIcon.classList.toggle('hidden', this.passwordInput.type === 'password')
+    this.hiddenPasswordIcon.classList.toggle('hidden', this.passwordInput.type === 'text')
+  }
+})