Add types to various low-level functions (#31781)

Adds types to various low-level modules. All changes are type-only, no
runtime changes. `tsc` now reports 38 less errors.

One problem was that `@types/sortablejs` does not accept promise return
in its functions which triggered the linter, so I disabled the rules on
those line.

package.json

@@ -107,6 +107,7 @@
     "stylelint-declaration-strict-value": "1.10.6",
     "stylelint-value-no-unknown-custom-properties": "6.0.1",
     "svgo": "3.3.2",
+    "type-fest": "4.23.0",
     "updates": "16.3.7",
     "vite-string-plugin": "1.3.4",
     "vitest": "2.0.5"

types.d.ts

@@ -3,6 +3,11 @@ declare module '*.svg' {
   export default value;
 }
 
+declare module '*.css' {
+  const value: string;
+  export default value;
+}
+
 declare let __webpack_public_path__: string;
 
 interface Window {
@@ -20,3 +25,7 @@ declare module 'htmx.org/dist/htmx.esm.js' {
   const value = await import('htmx.org');
   export default value;
 }
+
+interface Element {
+  _tippy: import('tippy.js').Instance;
+}

web_src/js/features/dropzone.ts

@@ -52,7 +52,7 @@ function addCopyLink(file) {
   copyLinkEl.addEventListener('click', async (e) => {
     e.preventDefault();
     const success = await clippie(generateMarkdownLinkForAttachment(file));
-    showTemporaryTooltip(e.target, success ? i18n.copy_success : i18n.copy_error);
+    showTemporaryTooltip(e.target as Element, success ? i18n.copy_success : i18n.copy_error);
   });
   file.previewTemplate.append(copyLinkEl);
 }

web_src/js/features/repo-issue-list.ts

@@ -196,7 +196,7 @@ async function initIssuePinSort() {
 
   createSortable(pinDiv, {
     group: 'shared',
-    onEnd: pinMoveEnd,
+    onEnd: pinMoveEnd, // eslint-disable-line @typescript-eslint/no-misused-promises
   });
 }
 

web_src/js/features/repo-projects.ts

@@ -60,7 +60,7 @@ async function initRepoProjectSortable() {
     handle: '.project-column-header',
     delayOnTouchOnly: true,
     delay: 500,
-    onSort: async () => {
+    onSort: async () => { // eslint-disable-line @typescript-eslint/no-misused-promises
       boardColumns = mainBoard.querySelectorAll('.project-column');
 
       const columnSorting = {
@@ -84,8 +84,8 @@ async function initRepoProjectSortable() {
     const boardCardList = boardColumn.querySelectorAll('.cards')[0];
     createSortable(boardCardList, {
       group: 'shared',
-      onAdd: moveIssue,
-      onUpdate: moveIssue,
+      onAdd: moveIssue, // eslint-disable-line @typescript-eslint/no-misused-promises
+      onUpdate: moveIssue, // eslint-disable-line @typescript-eslint/no-misused-promises
       delayOnTouchOnly: true,
       delay: 500,
     });

web_src/js/features/stopwatch.ts

@@ -27,7 +27,7 @@ export function initStopwatch() {
     stopwatchEl.removeAttribute('href'); // intended for noscript mode only
 
     createTippy(stopwatchEl, {
-      content: stopwatchPopup.cloneNode(true),
+      content: stopwatchPopup.cloneNode(true) as Element,
       placement: 'bottom-end',
       trigger: 'click',
       maxWidth: 'none',

web_src/js/modules/dirauto.ts

@@ -1,7 +1,9 @@
 import {isDocumentFragmentOrElementNode} from '../utils/dom.ts';
 
+type DirElement = HTMLInputElement | HTMLTextAreaElement;
+
 // for performance considerations, it only uses performant syntax
-function attachDirAuto(el) {
+function attachDirAuto(el: DirElement) {
   if (el.type !== 'hidden' &&
       el.type !== 'checkbox' &&
       el.type !== 'radio' &&
@@ -18,10 +20,12 @@ export function initDirAuto() {
       const mutation = mutationList[i];
       const len = mutation.addedNodes.length;
       for (let i = 0; i < len; i++) {
-        const addedNode = mutation.addedNodes[i];
+        const addedNode = mutation.addedNodes[i] as HTMLElement;
         if (!isDocumentFragmentOrElementNode(addedNode)) continue;
-        if (addedNode.nodeName === 'INPUT' || addedNode.nodeName === 'TEXTAREA') attachDirAuto(addedNode);
-        const children = addedNode.querySelectorAll('input, textarea');
+        if (addedNode.nodeName === 'INPUT' || addedNode.nodeName === 'TEXTAREA') {
+          attachDirAuto(addedNode as DirElement);
+        }
+        const children = addedNode.querySelectorAll<DirElement>('input, textarea');
         const len = children.length;
         for (let childIdx = 0; childIdx < len; childIdx++) {
           attachDirAuto(children[childIdx]);
@@ -30,7 +34,7 @@ export function initDirAuto() {
     }
   });
 
-  const docNodes = document.querySelectorAll('input, textarea');
+  const docNodes = document.querySelectorAll<DirElement>('input, textarea');
   const len = docNodes.length;
   for (let i = 0; i < len; i++) {
     attachDirAuto(docNodes[i]);

web_src/js/modules/sortable.ts

@@ -1,4 +1,6 @@
-export async function createSortable(el, opts = {}) {
+import type {SortableOptions} from 'sortablejs';
+
+export async function createSortable(el, opts: {handle?: string} & SortableOptions = {}) {
   const {Sortable} = await import(/* webpackChunkName: "sortablejs" */'sortablejs');
 
   return new Sortable(el, {
@@ -15,5 +17,5 @@ export async function createSortable(el, opts = {}) {
       opts.onUnchoose?.(e);
     },
     ...opts,
-  });
+  } satisfies SortableOptions);
 }

web_src/js/modules/stores.ts

@@ -1,6 +1,7 @@
 import {reactive} from 'vue';
+import type {Reactive} from 'vue';
 
-let diffTreeStoreReactive;
+let diffTreeStoreReactive: Reactive<Record<string, any>>;
 export function diffTreeStore() {
   if (!diffTreeStoreReactive) {
     diffTreeStoreReactive = reactive(window.config.pageData.diffFileInfo);

web_src/js/modules/tippy.ts

@@ -1,32 +1,38 @@
 import tippy, {followCursor} from 'tippy.js';
 import {isDocumentFragmentOrElementNode} from '../utils/dom.ts';
 import {formatDatetime} from '../utils/time.ts';
+import type {Content, Instance, Props} from 'tippy.js';
 
-const visibleInstances = new Set();
+type TippyOpts = {
+  role?: string,
+  theme?: 'default' | 'tooltip' | 'menu' | 'box-with-header' | 'bare',
+} & Partial<Props>;
+
+const visibleInstances = new Set<Instance>();
 const arrowSvg = `<svg width="16" height="7"><path d="m0 7 8-7 8 7Z" class="tippy-svg-arrow-outer"/><path d="m0 8 8-7 8 7Z" class="tippy-svg-arrow-inner"/></svg>`;
 
-export function createTippy(target, opts = {}) {
+export function createTippy(target: Element, opts: TippyOpts = {}) {
   // the callback functions should be destructured from opts,
   // because we should use our own wrapper functions to handle them, do not let the user override them
   const {onHide, onShow, onDestroy, role, theme, arrow, ...other} = opts;
 
-  const instance = tippy(target, {
+  const instance: Instance = tippy(target, {
     appendTo: document.body,
     animation: false,
     allowHTML: false,
     hideOnClick: false,
     interactiveBorder: 20,
     ignoreAttributes: true,
     maxWidth: 500, // increase over default 350px
-    onHide: (instance) => {
+    onHide: (instance: Instance) => {
       visibleInstances.delete(instance);
       return onHide?.(instance);
     },
-    onDestroy: (instance) => {
+    onDestroy: (instance: Instance) => {
       visibleInstances.delete(instance);
       return onDestroy?.(instance);
     },
-    onShow: (instance) => {
+    onShow: (instance: Instance) => {
       // hide other tooltip instances so only one tooltip shows at a time
       for (const visibleInstance of visibleInstances) {
         if (visibleInstance.props.role === 'tooltip') {
@@ -43,7 +49,7 @@ export function createTippy(target, opts = {}) {
     theme: theme || role || 'default',
     plugins: [followCursor],
     ...other,
-  });
+  } satisfies Partial<Props>);
 
   if (role === 'menu') {
     target.setAttribute('aria-haspopup', 'true');
@@ -58,12 +64,8 @@ export function createTippy(target, opts = {}) {
  * If the target element has no content, then no tooltip will be attached, and it returns null.
  *
  * Note: "tooltip" doesn't equal to "tippy". "tooltip" means a auto-popup content, it just uses tippy as the implementation.
- *
- * @param target {HTMLElement}
- * @param content {null|string}
- * @returns {null|tippy}
  */
-function attachTooltip(target, content = null) {
+function attachTooltip(target: Element, content: Content = null) {
   switchTitleToTooltip(target);
 
   content = content ?? target.getAttribute('data-tooltip-content');
@@ -84,7 +86,7 @@ function attachTooltip(target, content = null) {
     placement: target.getAttribute('data-tooltip-placement') || 'top-start',
     followCursor: target.getAttribute('data-tooltip-follow-cursor') || false,
     ...(target.getAttribute('data-tooltip-interactive') === 'true' ? {interactive: true, aria: {content: 'describedby', expanded: false}} : {}),
-  };
+  } as TippyOpts;
 
   if (!target._tippy) {
     createTippy(target, props);
@@ -94,7 +96,7 @@ function attachTooltip(target, content = null) {
   return target._tippy;
 }
 
-function switchTitleToTooltip(target) {
+function switchTitleToTooltip(target: Element) {
   let title = target.getAttribute('title');
   if (title) {
     // apply custom formatting to relative-time's tooltips
@@ -118,16 +120,15 @@ function switchTitleToTooltip(target) {
  * According to https://www.w3.org/TR/DOM-Level-3-Events/#events-mouseevent-event-order , mouseover event is fired before mouseenter event
  * Some browsers like PaleMoon don't support "addEventListener('mouseenter', capture)"
  * The tippy by default uses "mouseenter" event to show, so we use "mouseover" event to switch to tippy
- * @param e {Event}
  */
-function lazyTooltipOnMouseHover(e) {
+function lazyTooltipOnMouseHover(e: MouseEvent) {
   e.target.removeEventListener('mouseover', lazyTooltipOnMouseHover, true);
   attachTooltip(this);
 }
 
 // Activate the tooltip for current element.
 // If the element has no aria-label, use the tooltip content as aria-label.
-function attachLazyTooltip(el) {
+function attachLazyTooltip(el: Element) {
   el.addEventListener('mouseover', lazyTooltipOnMouseHover, {capture: true});
 
   // meanwhile, if the element has no aria-label, use the tooltip content as aria-label
@@ -140,15 +141,15 @@ function attachLazyTooltip(el) {
 }
 
 // Activate the tooltip for all children elements.
-function attachChildrenLazyTooltip(target) {
-  for (const el of target.querySelectorAll('[data-tooltip-content]')) {
+function attachChildrenLazyTooltip(target: Element) {
+  for (const el of target.querySelectorAll<Element>('[data-tooltip-content]')) {
     attachLazyTooltip(el);
   }
 }
 
 export function initGlobalTooltips() {
   // use MutationObserver to detect new "data-tooltip-content" elements added to the DOM, or attributes changed
-  const observerConnect = (observer) => observer.observe(document, {
+  const observerConnect = (observer: MutationObserver) => observer.observe(document, {
     subtree: true,
     childList: true,
     attributeFilter: ['data-tooltip-content', 'title'],
@@ -159,15 +160,15 @@ export function initGlobalTooltips() {
     for (const mutation of [...mutationList, ...pending]) {
       if (mutation.type === 'childList') {
         // mainly for Vue components and AJAX rendered elements
-        for (const el of mutation.addedNodes) {
+        for (const el of mutation.addedNodes as NodeListOf<Element>) {
           if (!isDocumentFragmentOrElementNode(el)) continue;
           attachChildrenLazyTooltip(el);
           if (el.hasAttribute('data-tooltip-content')) {
             attachLazyTooltip(el);
           }
         }
       } else if (mutation.type === 'attributes') {
-        attachTooltip(mutation.target);
+        attachTooltip(mutation.target as Element);
       }
     }
     observerConnect(observer);
@@ -177,7 +178,7 @@ export function initGlobalTooltips() {
   attachChildrenLazyTooltip(document.documentElement);
 }
 
-export function showTemporaryTooltip(target, content) {
+export function showTemporaryTooltip(target: Element, content: Content) {
   // if the target is inside a dropdown, don't show the tooltip because when the dropdown
   // closes, the tippy would be pushed unsightly to the top-left of the screen like seen
   // on the issue comment menu.

web_src/js/utils/color.ts

@@ -1,26 +1,27 @@
 import tinycolor from 'tinycolor2';
+import type {ColorInput} from 'tinycolor2';
 
 // Returns relative luminance for a SRGB color - https://en.wikipedia.org/wiki/Relative_luminance
 // Keep this in sync with modules/util/color.go
-function getRelativeLuminance(color) {
+function getRelativeLuminance(color: ColorInput) {
   const {r, g, b} = tinycolor(color).toRgb();
   return (0.2126729 * r + 0.7151522 * g + 0.072175 * b) / 255;
 }
 
-function useLightText(backgroundColor) {
+function useLightText(backgroundColor: ColorInput) {
   return getRelativeLuminance(backgroundColor) < 0.453;
 }
 
 // Given a background color, returns a black or white foreground color that the highest
 // contrast ratio. In the future, the APCA contrast function, or CSS `contrast-color` will be better.
 // https://github.com/color-js/color.js/blob/eb7b53f7a13bb716ec8b28c7a56f052cd599acd9/src/contrast/APCA.js#L42
-export function contrastColor(backgroundColor) {
+export function contrastColor(backgroundColor: ColorInput) {
   return useLightText(backgroundColor) ? '#fff' : '#000';
 }
 
-function resolveColors(obj) {
+function resolveColors(obj: Record<string, string>) {
   const styles = window.getComputedStyle(document.documentElement);
-  const getColor = (name) => styles.getPropertyValue(name).trim();
+  const getColor = (name: string) => styles.getPropertyValue(name).trim();
   return Object.fromEntries(Object.entries(obj).map(([key, value]) => [key, getColor(value)]));
 }