build: upgraded to ESLint v9

Author: pozil

eslint.config.js

@@ -0,0 +1,47 @@
+'use strict';
+
+const { defineConfig } = require('eslint/config');
+const eslintJs = require('@eslint/js');
+const jestPlugin = require('eslint-plugin-jest');
+const salesforceLwcConfig = require('@salesforce/eslint-config-lwc/recommended');
+const globals = require('globals');
+
+module.exports = defineConfig([
+    // LWC configuration
+    {
+        files: ['src*/main/default/lwc/**/*.js'],
+        extends: [salesforceLwcConfig]
+    },
+
+    // LWC configuration with override for LWC test files
+    {
+        files: ['src-*/main/default/lwc/**/*.test.js'],
+        extends: [salesforceLwcConfig],
+        rules: {
+            '@lwc/lwc/no-unexpected-wire-adapter-usages': 'off'
+        },
+        languageOptions: {
+            globals: {
+                ...globals.node
+            }
+        }
+    },
+
+    // Jest mocks configuration
+    {
+        files: ['src*/test/jest-mocks/**/*.js'],
+        languageOptions: {
+            sourceType: 'module',
+            ecmaVersion: 'latest',
+            globals: {
+                ...globals.node,
+                ...globals.es2021,
+                ...jestPlugin.environments.globals.globals
+            }
+        },
+        plugins: {
+            eslintJs
+        },
+        extends: ['eslintJs/recommended']
+    }
+]);

src-sample/main/default/lwc/.eslintrc.json

@@ -66,7 +66,6 @@ export default class SampleLookupContainer extends LightningElement {
             lookupElement.setSearchResults(results);
         } catch (error) {
             this.notifyUser('Lookup Error', 'An error occurred while searching with the lookup field.', 'error');
-            // eslint-disable-next-line no-console
             console.error('Lookup error', JSON.stringify(error));
             this.errors = [error];
         }

src-sample/main/default/lwc/sampleLookupContainer/sampleLookupContainer.js

@@ -1,4 +1,4 @@
-const { createLookupElement, inputSearchTerm, SAMPLE_SEARCH_ITEMS } = require('./lookupTest.utils');
+import { createLookupElement, inputSearchTerm, SAMPLE_SEARCH_ITEMS } from './lookupTest.utils';
 
 const SAMPLE_SEARCH_TOO_SHORT_WHITESPACE = 'A ';
 const SAMPLE_SEARCH_TOO_SHORT_SPECIAL = 'a*';

src/main/default/lwc/.eslintrc.json

@@ -1,4 +1,4 @@
-const { createLookupElement, inputSearchTerm, flushPromises, SAMPLE_SEARCH_ITEMS } = require('./lookupTest.utils');
+import { createLookupElement, inputSearchTerm, flushPromises, SAMPLE_SEARCH_ITEMS } from './lookupTest.utils';
 import { getNavigateCalledWith } from 'lightning/navigation';
 
 const SAMPLE_SEARCH = 'sample';

src/main/default/lwc/lookup/__tests__/lookupEventFiring.test.js

@@ -1,4 +1,4 @@
-const { createLookupElement, inputSearchTerm, flushPromises, SAMPLE_SEARCH_ITEMS } = require('./lookupTest.utils');
+import { createLookupElement, inputSearchTerm, flushPromises, SAMPLE_SEARCH_ITEMS } from './lookupTest.utils';
 
 describe('c-lookup exposed functions', () => {
     afterEach(() => {

src/main/default/lwc/lookup/__tests__/lookupEventHandling.test.js

@@ -1,10 +1,10 @@
-const {
+import {
     createLookupElement,
     flushPromises,
     inputSearchTerm,
     SAMPLE_SEARCH_ITEMS,
     LABEL_NO_RESULTS
-} = require('./lookupTest.utils');
+} from './lookupTest.utils';
 
 describe('c-lookup rendering', () => {
     afterEach(() => {