Build for a more modern target (#1286)

* move in bundling changes from pr/load-error-messages

* some more eslint adjustments

* typecheck js

* changeset

* disable `checkJs` for now

---------

Co-authored-by: Jerel Miller <jerelmiller@gmail.com>

.changeset/tender-cameras-fold.md

@@ -0,0 +1,5 @@
+---
+"apollo-client-devtools": minor
+---
+
+Change transpilation target to create a smaller and more modern DevTools build.

.vscode/settings.json

@@ -1,4 +1,6 @@
 {
   "editor.formatOnSave": true,
-  "typescript.tsdk": "node_modules/typescript/lib"
+  "typescript.tsdk": "node_modules/typescript/lib",
+  "eslint.experimental.useFlatConfig": true,
+  "eslint.workingDirectories": ["./*"]
 }

eslint.config.js

@@ -0,0 +1,63 @@
+import eslint from "@eslint/js";
+import tseslint from "typescript-eslint";
+import testingLibrary from "eslint-plugin-testing-library";
+import reactRecommended from "eslint-plugin-react/configs/recommended.js";
+import jsxRuntime from "eslint-plugin-react/configs/jsx-runtime.js";
+import hooksPlugin from "eslint-plugin-react-hooks";
+import globals from "globals";
+
+export default tseslint.config(
+  eslint.configs.recommended,
+  ...tseslint.configs.recommended,
+  reactRecommended,
+  jsxRuntime,
+  {
+    plugins: {
+      "testing-library": testingLibrary,
+    },
+    rules: testingLibrary.configs.react.rules,
+  },
+  {
+    plugins: {
+      "react-hooks": hooksPlugin,
+    },
+    // @ts-expect-error waiting for https://github.com/facebook/react/issues/28313
+    rules: hooksPlugin.configs.recommended.rules,
+  },
+  // original config contained a reference to jest-dom, but didn't configure any rules - skipping
+  {
+    languageOptions: {
+      ecmaVersion: 2022,
+      sourceType: "module",
+      globals: {
+        ...globals.browser,
+        ...globals.node,
+        ...globals.webextensions,
+      },
+    },
+    rules: {
+      "react/prop-types": 0,
+      "react/no-unknown-property": "error",
+      "react/display-name": "off",
+      "testing-library/no-node-access": "off",
+      "@typescript-eslint/no-explicit-any": "warn",
+      "@typescript-eslint/no-unused-vars": [
+        "warn",
+        { ignoreRestSiblings: true },
+      ],
+      "@typescript-eslint/consistent-type-imports": [
+        "error",
+        {
+          prefer: "type-imports",
+          disallowTypeAnnotations: false,
+          fixStyle: "separate-type-imports",
+        },
+      ],
+    },
+    settings: {
+      react: {
+        version: "detect",
+      },
+    },
+  }
+);

jest.config.js

@@ -1,4 +1,4 @@
-module.exports = {
+export default {
   preset: "ts-jest",
   setupFilesAfterEnv: ["./test.setup.ts"],
   testEnvironment: "jsdom",