feat: configure prettier, eslint, husky and lint-staged (#5)

.eslintignore

@@ -0,0 +1,2 @@
+dist
+node_modules

.eslintrc.json

@@ -0,0 +1,11 @@
+{
+  "env": {
+    "browser": true,
+    "es2021": true
+  },
+  "extends": ["eslint:recommended", "prettier"],
+  "parserOptions": {
+    "ecmaVersion": 2015,
+    "sourceType": "module"
+  }
+}

.husky/pre-commit

@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+pnpm exec lint-staged

.prettierignore

@@ -0,0 +1,3 @@
+dist
+coverage
+node_modules

.prettierrc

@@ -0,0 +1 @@
+{}

jest.config.json

@@ -0,0 +1,21 @@
+{
+  "preset": "ts-jest",
+  "testEnvironment": "node",
+  "testMatch": ["**/?(*.)+(spec|test).ts?(x)"],
+  "collectCoverageFrom": ["src/**/*.{ts,tsx}"],
+  "verbose": true,
+  "transform": {
+    "^.+\\.(ts|tsx)$": "ts-jest"
+  },
+  "moduleNameMapper": {
+    "^@src/(.*)$": "<rootDir>/src/$1"
+  },
+  "coverageThreshold": {
+    "global": {
+      "branches": 80,
+      "functions": 80,
+      "lines": 80,
+      "statements": 80
+    }
+  }
+}

package.json

@@ -19,7 +19,13 @@
     "build": "rollup -c",
     "start": "node dist/index.cjs",
     "test": "jest --coverage",
-    "release": "semantic-release"
+    "release": "semantic-release",
+    "lint": "eslint .",
+    "format": "prettier --write \"**/*.{js,ts}\"",
+    "prepare": "husky install"
+  },
+  "lint-staged": {
+    "**/*": "prettier --write \"**/*.{js,ts}\" --ignore-unknown"
   },
   "devDependencies": {
     "@rollup/plugin-terser": "^0.4.4",
@@ -31,7 +37,12 @@
     "@semantic-release/npm": "^11.0.2",
     "@semantic-release/release-notes-generator": "^12.1.0",
     "@types/jest": "^29.5.11",
+    "eslint": "^8.56.0",
+    "eslint-config-prettier": "^9.1.0",
+    "husky": "^8.0.3",
     "jest": "^29.7.0",
+    "lint-staged": "^15.2.0",
+    "prettier": "3.2.4",
     "rollup": "^4.9.6",
     "semantic-release": "^17.4.7",
     "ts-jest": "^29.1.2",