lint typescript

.eslintignore

@@ -0,0 +1,3 @@
+dist
+node_modules
+.husky

.eslintrc.cjs

@@ -0,0 +1,13 @@
+/* eslint-env node */
+
+module.exports = {
+  root: true,
+  parser: '@typescript-eslint/parser',
+  plugins: [
+    '@typescript-eslint',
+  ],
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+  ],
+};

README.md

@@ -24,14 +24,18 @@ npm run build
 
 Find the artifacts in the `/dist` folder.
 
+# Examples
+
+Open `/examples/index.html` in the browser.
+
+# Development
+
+The dev environment is configured with Prettier, Husky, lint-staged, eslint for TypeScript and Jest.
+
 # Testing
 
 ```bash
 npm test
 ```
 
 Runs a jest test creating an AceEditor instance.
-
-# Examples
-
-Open `/examples/index.html` in the browser.

examples/PrestoSqlMode.js

@@ -1,4 +1,5 @@
-ace.define('ace/mode/prestosql', [], function (require, exports, module) {
+/* eslint-disable no-undef */
+ace.define('ace/mode/prestosql', [], function (require, exports) {
   var oop = require('ace/lib/oop');
   var TextMode = require('ace/mode/text').Mode;
   var PrestoSqlHighlightRules = require('ace/mode/prestosql_highlight_rules').PrestoSqlHighlightRules;
@@ -15,7 +16,7 @@ ace.define('ace/mode/prestosql', [], function (require, exports, module) {
   exports.Mode = Mode;
 });
 
-ace.define('ace/mode/prestosql_highlight_rules', [], function (require, exports, module) {
+ace.define('ace/mode/prestosql_highlight_rules', [], function (require, exports) {
   var oop = require('ace/lib/oop');
   var TextHighlightRules = require('ace/mode/text_highlight_rules').TextHighlightRules;
 

jest.config.js

@@ -1,8 +1,6 @@
+/* eslint-env node */
+
 module.exports = {
-  roots: ['<rootDir>/src'],
-  testMatch: ['**/__tests__/**/*.+(ts|tsx|js)', '**/?(*.)+(spec|test).+(ts|tsx|js)'],
-  transform: {
-    '^.+\\.(ts|tsx)$': 'ts-jest',
-  },
   testEnvironment: 'jsdom',
+  preset: 'ts-jest',
 };