chore(refactor): apply eslint hints

.eslintrc.js

@@ -30,6 +30,7 @@ module.exports = {
         "@typescript-eslint/no-unsafe-return": "off",
         "@typescript-eslint/no-non-null-assertion": "off",
         "@typescript-eslint/explicit-module-boundary-types": "off",
+        "@typescript-eslint/explicit-module-boundary-types": "off",
       },
     },
     {

karma.conf.js

@@ -29,7 +29,7 @@ module.exports = function (config) {
     plugins: [
       "karma-mocha",
       "karma-typescript",
-      require("karma-mocha-reporter"),
+      "karma-mocha-reporter",
       require("./karma-benchmark-reporter.cjs"),
       "karma-chrome-launcher",
       "karma-firefox-launcher",

src/h.ts

@@ -16,11 +16,7 @@ function addNS(
     for (let i = 0; i < children.length; ++i) {
       const childData = children[i].data;
       if (childData !== undefined) {
-        addNS(
-          childData,
-          (children[i] as VNode).children as VNodes,
-          children[i].sel
-        );
+        addNS(childData, children[i].children as VNodes, children[i].sel);
       }
     }
   }

src/modules/hero.ts

@@ -41,7 +41,7 @@ function calcTransformOrigin(
         textRect.left + textRect.width / 2 - boundingRect.left;
       const relativeCenterY =
         textRect.top + textRect.height / 2 - boundingRect.top;
-      return relativeCenterX + "px " + relativeCenterY + "px";
+      return `${relativeCenterX}px ${relativeCenterY}px`;
     }
   }
   return "0 0"; // top left
@@ -168,18 +168,9 @@ function post() {
         newRect
       );
       newStyle.opacity = "0";
-      newStyle.transform =
-        origTransform +
-        "translate(" +
-        dx +
-        "px, " +
-        dy +
-        "px) " +
-        "scale(" +
-        1 / wRatio +
-        ", " +
-        1 / hRatio +
-        ")";
+      newStyle.transform = `${origTransform}translate(${dx}px, ${dy}px) scale(${
+        1 / wRatio
+      }, ${1 / hRatio})`;
       setNextFrame(newStyle, "transition", origTransition);
       setNextFrame(newStyle, "transform", origTransform);
       setNextFrame(newStyle, "opacity", "1");
@@ -197,10 +188,10 @@ function post() {
         }
       }
       oldStyle.position = "absolute";
-      oldStyle.top = oldRect.top + "px"; // start at existing position
-      oldStyle.left = oldRect.left + "px";
-      oldStyle.width = oldRect.width + "px"; // Needed for elements who were sized relative to their parents
-      oldStyle.height = oldRect.height + "px"; // Needed for elements who were sized relative to their parents
+      oldStyle.top = `${oldRect.top}px`; // start at existing position
+      oldStyle.left = `${oldRect.left}px`;
+      oldStyle.width = `${oldRect.width}px`; // Needed for elements who were sized relative to their parents
+      oldStyle.height = `${oldRect.height}px`; // Needed for elements who were sized relative to their parents
       oldStyle.margin = "0"; // Margin on hero element leads to incorrect positioning
       oldStyle.transformOrigin = calcTransformOrigin(
         isTextNode,
@@ -213,15 +204,7 @@ function post() {
       setNextFrame(
         oldStyle,
         "transform",
-        "translate(" +
-          -dx +
-          "px, " +
-          -dy +
-          "px) scale(" +
-          wRatio +
-          ", " +
-          hRatio +
-          ")"
+        `translate(${-dx}px, ${-dy}px) scale(${wRatio}, ${hRatio})`
       ); // scale must be on far right for translate to be correct
       setNextFrame(oldStyle, "opacity", "0");
       oldElm.addEventListener("transitionend", function (ev: TransitionEvent) {

src/thunk.ts

@@ -11,8 +11,8 @@ export interface Thunk extends VNode {
 }
 
 export interface ThunkFn {
-  (sel: string, fn: Function, args: any[]): Thunk;
-  (sel: string, key: any, fn: Function, args: any[]): Thunk;
+  (sel: string, fn: (...args: any[]) => any, args: any[]): Thunk;
+  (sel: string, key: any, fn: (...args: any[]) => any, args: any[]): Thunk;
 }
 
 function copyToThunk(vnode: VNode, thunk: VNode): void {
@@ -26,7 +26,7 @@ function copyToThunk(vnode: VNode, thunk: VNode): void {
 
 function init(thunk: VNode): void {
   const cur = thunk.data as VNodeData;
-  const vnode = (cur.fn as any).apply(undefined, cur.args);
+  const vnode = (cur.fn as any)(...cur.args);
   copyToThunk(vnode, thunk);
 }
 
@@ -37,12 +37,12 @@ function prepatch(oldVnode: VNode, thunk: VNode): void {
   const oldArgs = old.args;
   const args = cur.args;
   if (old.fn !== cur.fn || (oldArgs as any).length !== (args as any).length) {
-    copyToThunk((cur.fn as any).apply(undefined, args), thunk);
+    copyToThunk((cur.fn as any)(...args), thunk);
     return;
   }
   for (i = 0; i < (args as any).length; ++i) {
     if ((oldArgs as any)[i] !== (args as any)[i]) {
-      copyToThunk((cur.fn as any).apply(undefined, args), thunk);
+      copyToThunk((cur.fn as any)(...args), thunk);
       return;
     }
   }

test/tsconfig.json

@@ -3,5 +3,5 @@
   "compilerOptions": {
     "esModuleInterop": true
   },
-  "include": ["./unit/*.ts"]
+  "include": ["./**/*.ts"]
 }

test/unit/core.ts

@@ -769,8 +769,7 @@ describe("snabbdom", function () {
               elm.children[i].innerHTML,
               shufArr[i].toString()
             );
-            const opacity = (elm.children[i] as HTMLSpanElement).style
-              .opacity as string;
+            const opacity = (elm.children[i] as HTMLSpanElement).style.opacity;
             assert.strictEqual(opacities[i].indexOf(opacity), 0);
           }
         }

test/unit/eventlisteners.ts

@@ -29,7 +29,7 @@ describe("event listeners", function () {
       "div",
       {
         on: {
-          click: function (ev) {
+          click: function () {
             result.push(1);
           },
         },
@@ -40,7 +40,7 @@ describe("event listeners", function () {
       "div",
       {
         on: {
-          click: function (ev) {
+          click: function () {
             result.push(2);
           },
         },

test/unit/thunk.ts

@@ -11,7 +11,7 @@ describe("thunk", function () {
   });
   it("returns vnode with data and render function", function () {
     function numberInSpan(n: number) {
-      return h("span", "Number is " + n);
+      return h("span", `Number is ${n}`);
     }
     const vnode = thunk("span", "num", numberInSpan, [22]);
     assert.deepEqual(vnode.sel, "span");
@@ -22,7 +22,7 @@ describe("thunk", function () {
     let called = 0;
     function numberInSpan(n: number) {
       called++;
-      return h("span", { key: "num" }, "Number is " + n);
+      return h("span", { key: "num" }, `Number is ${n}`);
     }
     const vnode1 = h("div", [thunk("span", "num", numberInSpan, [1])]);
     const vnode2 = h("div", [thunk("span", "num", numberInSpan, [2])]);
@@ -35,7 +35,7 @@ describe("thunk", function () {
     let called = 0;
     function numberInSpan(n: number) {
       called++;
-      return h("span", { key: "num" }, "Number is " + n);
+      return h("span", { key: "num" }, `Number is ${n}`);
     }
     const vnode1 = h("div", [thunk("span", "num", numberInSpan, [1])]);
     const vnode2 = h("div", [thunk("span", "num", numberInSpan, [1])]);
@@ -48,7 +48,7 @@ describe("thunk", function () {
     let called = 0;
     function numberInSpan(n: number) {
       called++;
-      return h("span", { key: "num" }, "Number is " + n);
+      return h("span", { key: "num" }, `Number is ${n}`);
     }
     const vnode1 = h("div", [thunk("span", "num", numberInSpan, [1])]);
     const vnode2 = h("div", [thunk("span", "num", numberInSpan, [1, 2])]);
@@ -61,11 +61,11 @@ describe("thunk", function () {
     let called = 0;
     function numberInSpan(n: number) {
       called++;
-      return h("span", { key: "num" }, "Number is " + n);
+      return h("span", { key: "num" }, `Number is ${n}`);
     }
     function numberInSpan2(n: number) {
       called++;
-      return h("span", { key: "num" }, "Number really is " + n);
+      return h("span", { key: "num" }, `Number really is ${n}`);
     }
     const vnode1 = h("div", [thunk("span", "num", numberInSpan, [1])]);
     const vnode2 = h("div", [thunk("span", "num", numberInSpan2, [1])]);
@@ -78,7 +78,7 @@ describe("thunk", function () {
     let called = 0;
     function numberInSpan(n: number) {
       called++;
-      return h("span", { key: "num" }, "Number is " + n);
+      return h("span", { key: "num" }, `Number is ${n}`);
     }
     const vnode1 = h("div", [thunk("span", "num", numberInSpan, [1])]);
     const vnode2 = h("div", [thunk("span", "num", numberInSpan, [1])]);
@@ -106,7 +106,7 @@ describe("thunk", function () {
     let called = 0;
     function numberInSpan(n: number) {
       called++;
-      return h("span", { key: "num" }, "Number is " + n);
+      return h("span", { key: "num" }, `Number is ${n}`);
     }
     const vnode1 = thunk("span", "num", numberInSpan, [1]);
     const vnode2 = thunk("span", "num", numberInSpan, [1]);
@@ -127,11 +127,11 @@ describe("thunk", function () {
   });
   it("can be replaced and removed", function () {
     function numberInSpan(n: number) {
-      return h("span", { key: "num" }, "Number is " + n);
+      return h("span", { key: "num" }, `Number is ${n}`);
     }
     function oddEven(n: number): VNode {
       const prefix = n % 2 === 0 ? "Even" : "Odd";
-      return h("div", { key: oddEven as any }, prefix + ": " + n);
+      return h("div", { key: oddEven as any }, `${prefix}: ${n}`);
     }
     const vnode1 = h("div", [thunk("span", "num", numberInSpan, [1])]);
     const vnode2 = h("div", [thunk("div", "oddEven", oddEven, [4])]);
@@ -146,11 +146,11 @@ describe("thunk", function () {
   });
   it("can be replaced and removed when root", function () {
     function numberInSpan(n: number) {
-      return h("span", { key: "num" }, "Number is " + n);
+      return h("span", { key: "num" }, `Number is ${n}`);
     }
     function oddEven(n: number): VNode {
       const prefix = n % 2 === 0 ? "Even" : "Odd";
-      return h("div", { key: oddEven as any }, prefix + ": " + n);
+      return h("div", { key: oddEven as any }, `${prefix}: ${n}`);
     }
     const vnode1 = thunk("span", "num", numberInSpan, [1]);
     const vnode2 = thunk("div", "oddEven", oddEven, [4]);
@@ -172,7 +172,7 @@ describe("thunk", function () {
       return h(
         "span",
         { key: "num", hook: { destroy: destroyHook } },
-        "Number is " + n
+        `Number is ${n}`
       );
     }
     const vnode1 = h("div", [
@@ -194,7 +194,7 @@ describe("thunk", function () {
       return h(
         "span",
         { key: "num", hook: { remove: hook } },
-        "Number is " + n
+        `Number is ${n}`
       );
     }
     const vnode1 = h("div", [