Convert miscellaneous scripts to TypeScript

assets/js/pmwarning.ts

@@ -4,11 +4,11 @@
  * Warn users that their PM will be reviewed.
  */
 
-import { $ } from './utils/dom';
+import { $, hideEl, showEl } from './utils/dom';
 
-function warnAboutPMs() {
-  const textarea = $('.js-toolbar-input');
-  const warning = $('.js-hidden-warning');
+export function warnAboutPMs() {
+  const textarea = $<HTMLTextAreaElement>('.js-toolbar-input');
+  const warning = $<HTMLDivElement>('.js-hidden-warning');
   const imageEmbedRegex = /!+\[/g;
 
   if (!warning || !textarea) return;
@@ -17,12 +17,10 @@ function warnAboutPMs() {
     const value = textarea.value;
 
     if (value.match(imageEmbedRegex)) {
-      warning.classList.remove('hidden');
+      showEl(warning);
     }
     else if (!warning.classList.contains('hidden')) {
-      warning.classList.add('hidden');
+      hideEl(warning);
     }
   });
 }
-
-export { warnAboutPMs };

assets/js/poll.ts

@@ -1,6 +1,6 @@
 import { inputDuplicatorCreator } from './input-duplicator';
 
-function pollOptionCreator() {
+export function pollOptionCreator() {
   inputDuplicatorCreator({
     addButtonSelector: '.js-poll-add-option',
     fieldSelector: '.js-poll-option',
@@ -8,5 +8,3 @@ function pollOptionCreator() {
     removeButtonSelector: '.js-option-remove',
   });
 }
-
-export { pollOptionCreator };

assets/js/settings.ts

@@ -2,6 +2,7 @@
  * Settings.
  */
 
+import { assertNotNull, assertNotUndefined } from './utils/assert';
 import { $, $$ } from './utils/dom';
 import store from './utils/store';
 
@@ -9,9 +10,9 @@ export function setupSettings() {
 
   if (!$('#js-setting-table')) return;
 
-  const localCheckboxes = $$('[data-tab="local"] input[type="checkbox"]');
-  const themeSelect = $('#user_theme');
-  const styleSheet = $('head link[rel="stylesheet"]');
+  const localCheckboxes = $$<HTMLInputElement>('[data-tab="local"] input[type="checkbox"]');
+  const themeSelect = assertNotNull($<HTMLSelectElement>('#user_theme'));
+  const styleSheet = assertNotNull($<HTMLLinkElement>('head link[rel="stylesheet"]'));
 
   // Local settings
   localCheckboxes.forEach(checkbox => {
@@ -22,7 +23,7 @@ export function setupSettings() {
 
   // Theme preview
   themeSelect && themeSelect.addEventListener('change', () => {
-    styleSheet.href = themeSelect.options[themeSelect.selectedIndex].dataset.themePath;
+    styleSheet.href = assertNotUndefined(themeSelect.options[themeSelect.selectedIndex].dataset.themePath);
   });
 
 }