.eslintrc.js

'use strict';

module.exports = {
  extends: ['ash-nazg/sauron-node'],
  parserOptions: {
    ecmaVersion: 2020,
    sourceType: 'module'
  },
  env: {
    browser: true,
    es6: true
  },
  settings: {
    polyfills: [
      // These are the primary polyfills needed by regular users if
      //  not present, e.g., with core-js-bundle; also those under
      //  extensions
      // 'Array.isArray',
      // 'Blob',
      // 'console',
      // 'CustomEvent',
      // 'document.body',
      // 'document.createElementNS',
      // 'document.evaluate',
      // 'document.head',
      // 'document.importNode',
      // 'document.querySelector',
      // 'document.querySelectorAll',
      // 'DOMParser',
      // 'Error',
      'fetch',
      // 'FileReader',
      // 'JSON',
      // 'KeyboardEvent',
      // 'location.href',
      // 'location.origin',
      // 'MouseEvent',
      // 'MutationObserver',
      // 'navigator',
      // 'Number.isNaN',
      // 'Number.parseFloat',
      // 'Number.parseInt',
      // 'Object.assign',
      // 'Object.defineProperty',
      // 'Object.defineProperties',
      // 'Object.entries',
      // 'Object.getOwnPropertyDescriptor',
      // 'Object.keys',
      // 'Object.values',
      'Promise',
      'Promise.all',
      // 'Set',
      'Uint8Array',
      'URL'
      // 'URL.createObjectURL',
      // 'XMLSerializer',
      // 'XMLHttpRequest',
      // 'window.getComputedStyle',
      // 'window.parent',
      // 'window.scrollX',
      // 'window.scrollY'
    ]
  },
  rules: {
    // check-examples is not picking up eslint config properly in some
    //  environments; see also discussion above
    //  `mocha-cleanup/no-assertions-outside-it`
    'jsdoc/check-examples': ['warn', {
      rejectExampleCodeRegex: '^`'
    }],

    // https://github.com/sindresorhus/eslint-plugin-unicorn/issues/453
    'unicorn/regex-shorthand': 0,
    // The Babel transform seems to have a problem converting these
    'prefer-named-capture-group': 'off',
    'jsdoc/require-file-overview': ['error', {
      tags: {
        file: {
          initialCommentsOnly: true,
          preventDuplicates: true
        },
        license: {
          initialCommentsOnly: true,
          preventDuplicates: true
        },
        copyright: {
          initialCommentsOnly: true,
          preventDuplicates: true
        },
        author: {
          initialCommentsOnly: true,
          preventDuplicates: true
        },
        module: {
          initialCommentsOnly: true,
          preventDuplicates: true
        },
        exports: {
          initialCommentsOnly: true,
          preventDuplicates: true
        }
      }
    }],
    // Warning or Off for now but should be reviewed
    // Override these rules which are difficult for us
    //   to apply at this time
    'unicorn/prefer-string-slice': 'off',
    'default-case': 'off',
    'require-unicode-regexp': 'off',
    'max-len':
      [
        'warn',
        {ignoreComments: true, code: 130}
      ], // 130 is too much but too many occurences
    'unicorn/prefer-query-selector': 'off',
    'unicorn/no-fn-reference-in-iterator': 'off',
    'unicorn/prefer-node-append': 'off',
    'unicorn/no-zero-fractions': 'off',
    'unicorn/prefer-number-properties': 'off',
    'eslint-comments/require-description': 'off',
    'compat/compat': 'error',
    'consistent-this': 'off',
    'import/no-anonymous-default-export': 'off',
    'node/no-unsupported-features/node-builtins': 'warn',
    'prefer-exponentiation-operator': 'warn'
  },
  overrides: [
    // Locales have no need for importing outside of SVG-Edit
    // and translations may need a longer line length
    {
      files: [
        'src/editor/locale/lang.*.js', 'src/editor/extensions/ext-locale/**',
        'docs/tutorials/ExtensionDocs.md'
      ],
      rules: {
        'import/no-anonymous-default-export': 'off',
        'max-len': 'off'
      }
    },
    // These browser files don't do importing or requiring
    {
      files: [
        'src/editor/svgpathseg.js',
        'src/editor/touch.js',
        'src/editor/typedefs.js',
        'src/editor/redirect-on-no-module-support.js',
        'src/editor/extensions/imagelib/index.js',
        'src/external/dom-polyfill/dom-polyfill.js',
        'screencasts/svgopen2010/script.js'
      ],
      rules: {
        'import/unambiguous': ['off']
      }
    },
    {
      files: ['**/*.html', 'screencasts/**'],
      globals: {
        root: 'off'
      },
      settings: {
        polyfills: [
          'document.querySelector',
          'history',
          'history.pushState',
          'history.replaceState',
          'location.hash',
          'navigator',
          'Number.parseFloat',
          'Number.parseInt',
          'Number.isNaN'
        ]
      },
      rules: {
        'import/unambiguous': 'off'
      }
    },
    {
      files: ['.eslintrc.js', '.ncurc.js', 'tools/mochawesome-cli.js'],
      extends: [
        'ash-nazg/sauron-node-script'
      ]
    },
    // Our Markdown rules (and used for JSDoc examples as well, by way of
    //   our use of `jsdoc/check-examples` within `ash-nazg`)
    {
      files: ['**/*.md'],
      settings: {
        polyfills: [
          // Tutorials
          'console',
          'location.href'
        ]
      },
      rules: {
        // Todo: Figure out why this is not enough to disable warning
        //  for examples in my environment (but it is in others')
        // Used in examples of assert-close.js plugin
        'mocha-cleanup/no-assertions-outside-it': 'off',
        'eslint-comments/no-unused-disable': 'warn',
        'eol-last': ['off'],
        'no-console': ['off'],
        'no-undef': ['off'],
        'no-unused-vars': ['warn'],
        'padded-blocks': ['off'],
        'import/unambiguous': ['off'],
        'import/no-unresolved': ['off'],
        'node/no-missing-import': ['off'],
        'no-multi-spaces': 'off',
        'sonarjs/no-all-duplicated-branches': 'off',
        'node/no-unpublished-import': ['error', {
          allowModules: ['@cypress/fiddle']
        }],
        'no-alert': 'off',
        // Disable until may fix https://github.com/gajus/eslint-plugin-jsdoc/issues/211
        indent: 'off'
      }
    },
    {
      // As consumed by jsdoc, cannot be expressed as ESM
      files: ['docs/jsdoc-config.js'],
      parserOptions: {
        sourceType: 'script'
      },
      globals: {
        module: false
      },
      rules: {
        'import/no-commonjs': 'off',
        strict: 'off'
      }
    },
    {
      files: ['cypress/plugins/index.js'],
      extends: [
        'ash-nazg/sauron-node-script'
      ]
    },
    {
      files: ['cypress/**'],
      extends: [
        'plugin:cypress/recommended',
        'plugin:mocha/recommended',
        'plugin:mocha-cleanup/recommended-no-limits',
        'plugin:@fintechstudios/chai-as-promised/recommended',
        'plugin:chai-expect-keywords/recommended',
        'plugin:chai-expect/recommended',
        'plugin:chai-friendly/recommended'
      ],
      env: {
        node: true
      },
      settings: {
        polyfills: [
          'console',
          'Date.now',
          'document.body',
          'document.createElementNS',
          'document.head',
          'DOMParser',
          'Number.isNaN',
          'Object.keys',
          'Object.entries',
          'Promise'
        ]
      },
      rules: {
        // These errors are caused in Cypress files if user has not
        //  yet instrumented code; need to reinvestigate why we had to
        //  instrument separately from nyc mocha
        'import/no-unresolved': ['error', {ignore: ['/instrumented/']}],
        'node/no-missing-import': 'off',
        'jsdoc/check-examples': 'off',
        'chai-expect-keywords/no-unsupported-keywords': [
          'error', {
            allowChaiDOM: true
          }
        ],
        // Would be good but seems necessary due to some bugs in Cypress
        //  in detecting visibility
        // 'cypress/no-force': 0,
        // Good but would be difficult to enforce (and data-* may not be less
        //   brittle than IDs/classes anyways)
        // 'cypress/require-data-selectors': 0,
        'cypress/assertion-before-screenshot': 2,

        // Conflicts with Cypress `should`
        'mocha-cleanup/invalid-assertions': 0,

        // Might see about working around to avoid the option limitation,
        //  but convenient
        'mocha-cleanup/no-expressions-in-assertions': ['error', {
          replacementsOnly: true
        }],

        // Too oppressive when planning to extend a section
        'mocha/no-hooks-for-single-case': 0,

        // Would be good to enable but needs some refactoring
        'mocha/no-setup-in-describe': 0,
        'mocha-cleanup/no-outside-declaration': 0,

        // Useful to ensure allowing `this.timeout()`, etc., but a
        //  little oppressive
        'mocha/no-mocha-arrows': 0,
        // Useful if enabling the regular `prefer-arrow-callback`
        // 'mocha/prefer-arrow-callback': 2

        'jsdoc/require-jsdoc': 0,
        'no-console': 0,
        'import/unambiguous': 0
      }
    },
    {
      // Node files
      files: [
        'docs/jsdoc-config.js',
        'build/build-html.js',
        'rollup.config.js', 'rollup-config.config.js'
      ],
      env: {
        node: true
      },
      settings: {
        polyfills: [
          'console',
          'Promise.resolve'
        ]
      },
      globals: {
        require: true
      },
      rules: {
        // We can't put Rollup in npmignore or user can't get access,
        //  and we have too many modules to add to `peerDependencies`
        //  so this rule can know them to be available, so we instead
        //  disable
        'node/no-unpublished-import': 'off'
      }
    }
  ]
};