fix(mermaid-js#4003): Remove unhandled promises

Add eslint rules to check for unhandled promises
Fix all existing unhandled promise issues

.eslintignore

@@ -3,4 +3,5 @@ dist/**
 docs/Setup.md
 cypress.config.js
 cypress/plugins/index.js
-coverage
+coverage
+*.json

.eslintrc.cjs

@@ -0,0 +1,150 @@
+module.exports = {
+  env: {
+    browser: true,
+    es6: true,
+    'jest/globals': true,
+    node: true,
+  },
+  root: true,
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    ecmaFeatures: {
+      experimentalObjectRestSpread: true,
+      jsx: true,
+    },
+    tsconfigRootDir: __dirname,
+    sourceType: 'module',
+    ecmaVersion: 2020,
+    allowAutomaticSingleRunInference: true,
+    project: ['./tsconfig.eslint.json', './packages/*/tsconfig.json'],
+    parser: '@typescript-eslint/parser',
+  },
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:json/recommended',
+    'plugin:markdown/recommended',
+    'plugin:@cspell/recommended',
+    'prettier',
+  ],
+  plugins: [
+    '@typescript-eslint',
+    'no-only-tests',
+    'html',
+    'jest',
+    'jsdoc',
+    'json',
+    '@cspell',
+    'lodash',
+    'unicorn',
+  ],
+  rules: {
+    curly: 'error',
+    'no-console': 'error',
+    'no-prototype-builtins': 'off',
+    'no-unused-vars': 'off',
+    'cypress/no-async-tests': 'off',
+    '@typescript-eslint/no-floating-promises': 'error',
+    '@typescript-eslint/no-misused-promises': 'error',
+    '@typescript-eslint/ban-ts-comment': [
+      'error',
+      {
+        'ts-expect-error': 'allow-with-description',
+        'ts-ignore': 'allow-with-description',
+        'ts-nocheck': 'allow-with-description',
+        'ts-check': 'allow-with-description',
+        minimumDescriptionLength: 10,
+      },
+    ],
+    'json/*': ['error', 'allowComments'],
+    '@cspell/spellchecker': [
+      'error',
+      {
+        checkIdentifiers: false,
+        checkStrings: false,
+        checkStringTemplates: false,
+      },
+    ],
+    'no-empty': [
+      'error',
+      {
+        allowEmptyCatch: true,
+      },
+    ],
+    'no-only-tests/no-only-tests': 'error',
+    'lodash/import-scope': ['error', 'method'],
+    'unicorn/better-regex': 'error',
+    'unicorn/no-abusive-eslint-disable': 'error',
+    'unicorn/no-array-push-push': 'error',
+    'unicorn/no-for-loop': 'error',
+    'unicorn/no-instanceof-array': 'error',
+    'unicorn/no-typeof-undefined': 'error',
+    'unicorn/no-unnecessary-await': 'error',
+    'unicorn/no-unsafe-regex': 'warn',
+    'unicorn/no-useless-promise-resolve-reject': 'error',
+    'unicorn/prefer-array-find': 'error',
+    'unicorn/prefer-array-flat-map': 'error',
+    'unicorn/prefer-array-index-of': 'error',
+    'unicorn/prefer-array-some': 'error',
+    'unicorn/prefer-default-parameters': 'error',
+    'unicorn/prefer-includes': 'error',
+    'unicorn/prefer-negative-index': 'error',
+    'unicorn/prefer-object-from-entries': 'error',
+    'unicorn/prefer-string-starts-ends-with': 'error',
+    'unicorn/prefer-string-trim-start-end': 'error',
+    'unicorn/string-content': 'error',
+    'unicorn/prefer-spread': 'error',
+    'unicorn/no-lonely-if': 'error',
+  },
+  overrides: [
+    {
+      files: ['cypress/**', 'demos/**'],
+      rules: {
+        'no-console': 'off',
+      },
+    },
+    {
+      files: ['*.{js,jsx,mjs,cjs}'],
+      extends: ['plugin:jsdoc/recommended'],
+      rules: {
+        'jsdoc/check-indentation': 'off',
+        'jsdoc/check-alignment': 'off',
+        'jsdoc/check-line-alignment': 'off',
+        'jsdoc/multiline-blocks': 'off',
+        'jsdoc/newline-after-description': 'off',
+        'jsdoc/tag-lines': 'off',
+        'jsdoc/require-param-description': 'off',
+        'jsdoc/require-param-type': 'off',
+        'jsdoc/require-returns': 'off',
+        'jsdoc/require-returns-description': 'off',
+      },
+    },
+    {
+      files: ['*.{ts,tsx}'],
+      plugins: ['tsdoc'],
+      rules: {
+        'tsdoc/syntax': 'error',
+      },
+    },
+    {
+      files: ['*.spec.{ts,js}', 'cypress/**', 'demos/**', '**/docs/**'],
+      rules: {
+        'jsdoc/require-jsdoc': 'off',
+        '@typescript-eslint/no-unused-vars': 'off',
+      },
+    },
+    {
+      files: ['*.html', '*.md', '**/*.md/*'],
+      rules: {
+        'no-var': 'error',
+        'no-undef': 'off',
+        '@typescript-eslint/no-unused-vars': 'off',
+        '@typescript-eslint/no-floating-promises': 'off',
+        '@typescript-eslint/no-misused-promises': 'off',
+      },
+      parserOptions: {
+        project: null,
+      },
+    },
+  ],
+};

cypress/platform/viewer.js

@@ -151,7 +151,7 @@ if (typeof document !== 'undefined') {
         contentLoadedApi();
       } else {
         this.console.log('Not using api');
-        contentLoaded();
+        void contentLoaded();
       }
     },
     false

package.json

@@ -67,17 +67,17 @@
     "@types/node": "^18.11.9",
     "@types/prettier": "^2.7.1",
     "@types/rollup-plugin-visualizer": "^4.2.1",
-    "@typescript-eslint/eslint-plugin": "^5.42.1",
-    "@typescript-eslint/parser": "^5.42.1",
+    "@typescript-eslint/eslint-plugin": "^5.48.2",
+    "@typescript-eslint/parser": "^5.48.2",
     "@vitest/coverage-c8": "^0.27.0",
     "@vitest/ui": "^0.27.0",
     "concurrently": "^7.5.0",
     "coveralls": "^3.1.1",
     "cypress": "^10.11.0",
     "cypress-image-snapshot": "^4.0.1",
     "esbuild": "^0.17.0",
-    "eslint": "^8.27.0",
-    "eslint-config-prettier": "^8.5.0",
+    "eslint": "^8.32.0",
+    "eslint-config-prettier": "^8.6.0",
     "eslint-plugin-cypress": "^2.12.1",
     "eslint-plugin-html": "^7.1.0",
     "eslint-plugin-jest": "^27.1.5",

packages/mermaid/src/Diagram.ts

@@ -6,7 +6,7 @@ import { extractFrontMatter } from './diagram-api/frontmatter';
 import { isDetailedError } from './utils';
 import type { DetailedError } from './utils';
 
-export type ParseErrorFunction = (err: string | DetailedError, hash?: any) => void;
+export type ParseErrorFunction = (err: string | DetailedError | unknown, hash?: any) => void;
 
 export class Diagram {
   type = 'graph';