remove hasTouchEvents

ui/@types/lichess/index.d.ts

@@ -2,7 +2,6 @@ interface Lichess {
   load: Promise<unknown>; // window.onload promise
   info: any;
   requestIdleCallback(f: () => void): void;
-  hasTouchEvents: boolean;
   sri: string;
   storage: LichessStorageHelper;
   tempStorage: LichessStorageHelper;

ui/analyse/src/study/studyChapters.ts

@@ -93,7 +93,7 @@ export function view(ctrl: StudyCtrl): VNode {
       const makeSortable = function() {
         vData.sortable = window['Sortable'].create(el, {
           draggable: '.draggable',
-          handle: window.lichess.hasTouchEvents ? 'span' : undefined,
+          handle: 'ontouchstart' in window ? 'span' : undefined,
           onSort() {
             ctrl.chapters.sort(vData.sortable.toArray());
           }

ui/analyse/src/view.ts

@@ -306,7 +306,7 @@ export default function(ctrl: AnalyseCtrl): VNode {
     ctrl.keyboardHelp ? keyboardView(ctrl) : null,
     study ? studyView.overboard(study) : null,
     intro || h(addChapterId(study, 'div.analyse__board.main-board'), {
-      hook: (window.lichess.hasTouchEvents || ctrl.gamebookPlay()) ? undefined : bind('wheel', (e: WheelEvent) => wheel(ctrl, e))
+      hook: ('ontouchstart' in window || ctrl.gamebookPlay()) ? undefined : bind('wheel', (e: WheelEvent) => wheel(ctrl, e))
     }, [
       ...(clocks || []),
       playerBars ? playerBars[ctrl.bottomIsWhite() ? 1 : 0] : null,

ui/common/src/menuHover.ts

@@ -12,7 +12,7 @@ type State = any;
 
 const menuHover = () => {
 
-  if (window.lichess.hasTouchEvents) return;
+  if ('ontouchstart' in window) return;
 
   const interval = 100;
   const sensitivity = 10;

ui/msg/src/view/interact.ts

@@ -86,5 +86,5 @@ function setupTextarea(area: HTMLTextAreaElement, contact: string, ctrl: MsgCtrl
   });
   area.addEventListener('send', send);
 
-  if (!window.lichess.hasTouchEvents) area.focus();
+  if (!('ontouchstart' in window)) area.focus();
 }

ui/msg/src/view/util.ts

@@ -36,7 +36,7 @@ export function bind(eventName: string, f: (e: Event) => void) {
 }
 
 export function bindMobileMousedown(f: (e: Event) => any) {
-  return bind(window.lichess.hasTouchEvents ? 'click' : 'mousedown', f);
+  return bind('ontouchstart' in window ? 'click' : 'mousedown', f);
 }
 
 export function spinner(): VNode {

ui/puzzle/src/view/main.ts

@@ -93,7 +93,7 @@ export default function(ctrl: Controller): VNode {
       side.userBox(ctrl)
     ]),
     h('div.puzzle__board.main-board' + (ctrl.pref.blindfold ? '.blindfold' : ''), {
-      hook: window.lichess.hasTouchEvents ? undefined : bind('wheel', e => wheel(ctrl, e as WheelEvent))
+      hook: 'ontouchstart' in window ? undefined : bind('wheel', e => wheel(ctrl, e as WheelEvent))
     }, [
       chessground(ctrl),
       ctrl.promotion.view()

ui/round/src/view/main.ts

@@ -63,7 +63,7 @@ export function main(ctrl: RoundController): VNode {
     hook: util.onInsert(gridHacks.start)
   }, [
     h('div.round__app__board.main-board' + (ctrl.data.pref.blindfold ? '.blindfold' : ''), {
-      hook: window.lichess.hasTouchEvents ? undefined :
+      hook: 'ontouchstart' in window ? undefined :
         util.bind('wheel', (e: WheelEvent) => wheel(ctrl, e), undefined, false)
     }, [
       renderGround(ctrl),

ui/site/src/component/assets.ts

@@ -1,5 +1,3 @@
-import hasTouchEvents from './touchEvents';
-
 export const assetUrl = (path: string, opts: AssetUrlOpts = {}) => {
   opts = opts || {};
   const baseUrl = opts.sameDomain ? '' : document.body.getAttribute('data-asset-url'),
@@ -40,5 +38,5 @@ export const hopscotch = () => {
 
 export const slider = () =>
   loadScript(
-    'javascripts/vendor/jquery-ui.slider' + (hasTouchEvents ? '.touch' : '') + '.min.js'
+    'javascripts/vendor/jquery-ui.slider' + ('ontouchstart' in window ? '.touch' : '') + '.min.js'
   );

ui/site/src/component/powertip.ts

@@ -1,11 +1,10 @@
 import spinnerHtml from './spinner';
-import hasTouchEvents from './touchEvents';
 import { requestIdleCallback } from './functions';
 
 let hoverable: boolean;
 function isHoverable() {
   if (typeof hoverable === 'undefined')
-    hoverable = !hasTouchEvents /* Firefox <= 63 */ || !!getComputedStyle(document.body).getPropertyValue('--hoverable');
+    hoverable = !('ontouchstart' in window) /* Firefox <= 63 */ || !!getComputedStyle(document.body).getPropertyValue('--hoverable');
   return hoverable;
 }
 

ui/site/src/component/touchEvents.ts

@@ -1,3 +0,0 @@
-const hasTouchEvents = 'ontouchstart' in window;
-
-export default hasTouchEvents

ui/site/src/site.lichess.globals.ts

@@ -2,7 +2,6 @@ import StrongSocket from "./component/socket";
 import { requestIdleCallback, formAjax, numberFormat, escapeHtml } from "./component/functions";
 import makeChat from './component/chat';
 import once from './component/once';
-import hasTouchEvents from './component/touchEvents';
 import spinnerHtml from './component/spinner';
 import sri from './component/sri';
 import { storage, tempStorage } from "./component/storage";
@@ -26,7 +25,6 @@ export default function() {
   const l = window.lichess;
   l.StrongSocket = StrongSocket;
   l.requestIdleCallback = requestIdleCallback;
-  l.hasTouchEvents = hasTouchEvents;
   l.sri = sri;
   l.storage = storage;
   l.tempStorage = tempStorage;