refactor(bundle-size): drop dead code paths + declare class fields

babel.config.cjs

@@ -12,7 +12,16 @@ module.exports = (api) => {
           ];
 
     return {
-        presets: ["@babel/preset-typescript", "@babel/preset-react", presetEnv],
+        presets: [
+            // `allowDeclareFields` lets us write `declare field: T;` on
+            // class members — TS-only typed declarations that don't emit a
+            // class-field initializer at runtime. Used in src/* to drop the
+            // `this.x = void 0` writes that the constructor immediately
+            // overwrites.
+            ["@babel/preset-typescript", { allowDeclareFields: true }],
+            "@babel/preset-react",
+            presetEnv,
+        ],
         plugins: [["@babel/plugin-transform-react-jsx"]],
     };
 };

bundle-size/focusableFindAll.fixture.js

@@ -0,0 +1,23 @@
+import {
+    createTabster,
+    disposeTabster,
+    getTabsterAttribute,
+    setTabsterAttribute,
+    Types,
+} from "tabster";
+
+/** @param {ReturnType<typeof createTabster>} tabster */
+const useFocusable = (tabster) => tabster.focusable.findAll;
+
+console.log(
+    createTabster,
+    disposeTabster,
+    getTabsterAttribute,
+    setTabsterAttribute,
+    useFocusable,
+    Types
+);
+
+export default {
+    name: "focusable.findAll",
+};

bundle-size/focusableFindLast.fixture.js

@@ -0,0 +1,23 @@
+import {
+    createTabster,
+    disposeTabster,
+    getTabsterAttribute,
+    setTabsterAttribute,
+    Types,
+} from "tabster";
+
+/** @param {ReturnType<typeof createTabster>} tabster */
+const useFocusable = (tabster) => tabster.focusable.findLast;
+
+console.log(
+    createTabster,
+    disposeTabster,
+    getTabsterAttribute,
+    setTabsterAttribute,
+    useFocusable,
+    Types
+);
+
+export default {
+    name: "focusable.findLast",
+};

bundle-size/focusableFindNext.fixture.js

@@ -0,0 +1,23 @@
+import {
+    createTabster,
+    disposeTabster,
+    getTabsterAttribute,
+    setTabsterAttribute,
+    Types,
+} from "tabster";
+
+/** @param {ReturnType<typeof createTabster>} tabster */
+const useFocusable = (tabster) => tabster.focusable.findNext;
+
+console.log(
+    createTabster,
+    disposeTabster,
+    getTabsterAttribute,
+    setTabsterAttribute,
+    useFocusable,
+    Types
+);
+
+export default {
+    name: "focusable.findNext",
+};

bundle-size/focusableFindPrev.fixture.js

@@ -0,0 +1,23 @@
+import {
+    createTabster,
+    disposeTabster,
+    getTabsterAttribute,
+    setTabsterAttribute,
+    Types,
+} from "tabster";
+
+/** @param {ReturnType<typeof createTabster>} tabster */
+const useFocusable = (tabster) => tabster.focusable.findPrev;
+
+console.log(
+    createTabster,
+    disposeTabster,
+    getTabsterAttribute,
+    setTabsterAttribute,
+    useFocusable,
+    Types
+);
+
+export default {
+    name: "focusable.findPrev",
+};