Migrate to Typescript and improve umd/esm outputs

.eslintignore

@@ -1,4 +1,7 @@
+.vscode
+.idea
+.github
+.husky
 node_modules
 umd
 esm
-**/*.ts

.eslintrc.yml

@@ -1,26 +1,39 @@
-parser: 'babel-eslint'
+root: true
+parser: '@typescript-eslint/parser'
+plugins:
+  - '@typescript-eslint'
+extends:
+  - 'eslint:recommended'
+  - 'plugin:@typescript-eslint/recommended'
 env:
   browser: true
   es6: true
   node: true
-extends: 'eslint:recommended'
-globals:
-  Atomics: readonly
-  SharedArrayBuffer: readonly
-parserOptions:
-  ecmaVersion: 2018
-  sourceType: module
-rules: {}
+rules:
+  '@typescript-eslint/no-explicit-any': off
+  '@typescript-eslint/no-empty-function': off
 overrides:
   - files:
-      - '**/*.test.js'
+      - '**/*.test.ts'
     env:
       jest: true
+    rules:
+      '@typescript-eslint/ban-types': off
   - files:
-      - '**/*.spec.js'
-      - '**/*.expect.js'
+      - 'tests/*.spec.js'
+      - 'tests/*.expect.js'
     env:
       mocha: true
     globals:
       cy: true
       Cypress: true
+    rules:
+      '@typescript-eslint/no-var-requires': off
+      '@typescript-eslint/explicit-module-boundary-types': off
+  - files:
+      - 'scripts.js'
+      - 'tests/esm.server.js'
+    env:
+      node: true
+    rules:
+      '@typescript-eslint/no-var-requires': off

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: npm
+    directory: '/'
+    schedule:
+      interval: daily

.prettierignore

@@ -1,3 +1,5 @@
+.vscode
+.idea
 node_modules
 umd
 esm

babel.config.js

@@ -3,9 +3,34 @@ module.exports = {
     [
       '@babel/preset-env',
       {
-        targets: { browsers: ['>0.25%', 'not dead', 'IE 11'] },
+        targets: { ie: '11' },
         modules: 'umd',
       },
     ],
+    '@babel/preset-typescript',
   ],
+  env: {
+    esm: {
+      presets: [
+        [
+          '@babel/preset-env',
+          {
+            targets: { esmodules: true },
+            modules: false,
+          },
+        ],
+      ],
+    },
+    test: {
+      presets: [
+        [
+          '@babel/preset-env',
+          {
+            targets: { node: 12 },
+            modules: 'commonjs',
+          },
+        ],
+      ],
+    },
+  },
 };

jest.config.js

@@ -1,10 +1,10 @@
 module.exports = {
-  testMatch: ['**/*.test.js'],
+  testMatch: ['**/*.test.ts'],
   setupFiles: [
     '<rootDir>/node_modules/regenerator-runtime/runtime',
     '<rootDir>/node_modules/core-js/features/promise/index',
   ],
   transform: {
-    '^.+\\.js$': 'babel-jest',
+    '^.+\\.(j|t)s$': 'babel-jest',
   },
 };

lint-staged.config.js

@@ -1,4 +1,5 @@
 module.exports = {
-  '*.js': ['npm run prettier:rc', 'npm run lint:rc', 'npm run jest:rc'],
+  '*.ts': () => 'npm run types',
+  '*.{js,ts}': ['npm run prettier:rc', 'npm run lint:rc', 'npm run jest:rc'],
   '*.{md,yml,html}': ['npm run prettier:rc'],
 };