chore: upgrade to ESLint v9 (#1024)

* chore: upgrade to ESLint v9

* chore: prettier update

Author: pozil

CODE_OF_CONDUCT.md

@@ -35,23 +35,23 @@ socioeconomic status, or other similar personal characteristics.
 Examples of behavior that contributes to creating a positive environment
 include:
 
--   Using welcoming and inclusive language
--   Being respectful of differing viewpoints and experiences
--   Gracefully accepting constructive criticism
--   Focusing on what is best for the community
--   Showing empathy toward other community members
+- Using welcoming and inclusive language
+- Being respectful of differing viewpoints and experiences
+- Gracefully accepting constructive criticism
+- Focusing on what is best for the community
+- Showing empathy toward other community members
 
 Examples of unacceptable behavior by participants include:
 
--   The use of sexualized language or imagery and unwelcome sexual attention or
-    advances
--   Personal attacks, insulting/derogatory comments, or trolling
--   Public or private harassment
--   Publishing, or threatening to publish, others' private information—such as
-    a physical or electronic address—without explicit permission
--   Other conduct which could reasonably be considered inappropriate in a
-    professional setting
--   Advocating for or encouraging any of the above behaviors
+- The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+- Personal attacks, insulting/derogatory comments, or trolling
+- Public or private harassment
+- Publishing, or threatening to publish, others' private information—such as
+  a physical or electronic address—without explicit permission
+- Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+- Advocating for or encouraging any of the above behaviors
 
 ## Our Responsibilities
 

CONTRIBUTION.md

@@ -19,28 +19,28 @@ Agreement. You can do so by going to https://cla.salesforce.com/sign-cla.
 
 ## Branches
 
--   We work in `main`.
--   Our released (aka. _production_) branch is `main`.
--   Our work happens in _topic_ branches (feature and/or bug-fix).
-    -   feature as well as bug-fix branches are based on `main`
-    -   branches _should_ be kept up-to-date using `rebase`
-    -   see below for further merge instructions
+- We work in `main`.
+- Our released (aka. _production_) branch is `main`.
+- Our work happens in _topic_ branches (feature and/or bug-fix).
+    - feature as well as bug-fix branches are based on `main`
+    - branches _should_ be kept up-to-date using `rebase`
+    - see below for further merge instructions
 
 ### Merging between branches
 
--   We try to limit merge commits as much as possible.
+- We try to limit merge commits as much as possible.
 
--   _Topic_ branches are:
+- _Topic_ branches are:
 
     1. based on `main` and will be
     1. squash-merged into `main`.
 
 ## Pull Requests
 
--   Develop features and bug fixes in _topic_ branches.
--   _Topic_ branches can live in forks (external contributors) or within this repository (committers).
-    \*\* When creating _topic_ branches in this repository please prefix with `<developer-name>/`.
+- Develop features and bug fixes in _topic_ branches.
+- _Topic_ branches can live in forks (external contributors) or within this repository (committers).
+  \*\* When creating _topic_ branches in this repository please prefix with `<developer-name>/`.
 
 ### Merging Pull Requests
 
--   Pull request merging is restricted to squash & merge only.
+- Pull request merging is restricted to squash & merge only.

README.md

@@ -18,15 +18,15 @@ A collection of easy-to-digest code examples for Lightning Web Components. Each
 
 ## Table of contents
 
--   [Installing the app using a Scratch Org](#installing-the-app-using-a-scratch-org): This is the recommended installation option. Use this option if you are a developer who wants to experience the app and the code.
+- [Installing the app using a Scratch Org](#installing-the-app-using-a-scratch-org): This is the recommended installation option. Use this option if you are a developer who wants to experience the app and the code.
 
--   [Installing the app using an Unlocked Package](#installing-the-app-using-an-unlocked-package): This option allows anybody to experience the sample app without installing a local development environment.
+- [Installing the app using an Unlocked Package](#installing-the-app-using-an-unlocked-package): This option allows anybody to experience the sample app without installing a local development environment.
 
--   [Installing the app using a Developer Edition Org or a Trailhead Playground](#installing-the-app-using-a-developer-edition-org-or-a-trailhead-playground): Useful when tackling Trailhead Badges or if you want the app deployed to a more permanent environment than a Scratch org.
+- [Installing the app using a Developer Edition Org or a Trailhead Playground](#installing-the-app-using-a-developer-edition-org-or-a-trailhead-playground): Useful when tackling Trailhead Badges or if you want the app deployed to a more permanent environment than a Scratch org.
 
--   [Optional installation instructions](#optional-installation-instructions)
+- [Optional installation instructions](#optional-installation-instructions)
 
--   [Code tours](#code-tours)
+- [Code tours](#code-tours)
 
 ## Installing the app using a Scratch Org
 

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 for force-app/main/default/lwc
+    {
+        files: ['force-app/main/default/lwc/**/*.js'],
+        extends: [salesforceLwcConfig]
+    },
+
+    // LWC configuration with override for LWC test files
+    {
+        files: ['force-app/main/default/lwc/**/*.test.js'],
+        extends: [salesforceLwcConfig],
+        rules: {
+            '@lwc/lwc/no-unexpected-wire-adapter-usages': 'off'
+        },
+        languageOptions: {
+            globals: {
+                ...globals.node
+            }
+        }
+    },
+
+    // Jest mocks configuration
+    {
+        files: ['force-app/test/jest-mocks/**/*.js'],
+        languageOptions: {
+            sourceType: 'module',
+            ecmaVersion: 'latest',
+            globals: {
+                ...globals.node,
+                ...globals.es2021,
+                ...jestPlugin.environments.globals.globals
+            }
+        },
+        plugins: {
+            eslintJs
+        },
+        extends: ['eslintJs/recommended']
+    }
+]);

force-app/main/default/lwc/.eslintrc.json

@@ -35,7 +35,6 @@ export default class LibsFullCalendar extends LightningElement {
 
     initializeCalendar() {
         const calendarEl = this.template.querySelector('.calendar');
-        // eslint-disable-next-line no-undef
         if (typeof FullCalendar === 'undefined') {
             throw new Error(
                 'Could not load FullCalendar. Make sure that Lightning Web Security is enabled for your org. See link below.'

force-app/main/default/lwc/libsFullCalendar/libsFullCalendar.js

@@ -1,4 +1,3 @@
-/* eslint-disable no-unused-vars */
 import { createElement } from 'lwc';
 import NavToNewRecordWithDefaults from 'c/navToNewRecordWithDefaults';
 import { getNavigateCalledWith } from 'lightning/navigation';