.eslintrc.json

{
    "rules": {
        "curly": ["error"],
        "eol-last": ["error"],
        "keyword-spacing": ["error"],
        "linebreak-style": ["error", "unix"],
        "max-len": [
            "error",
            {
                "code": 100,
                "tabWidth": 4,
                "ignoreStrings": true,
                "ignoreRegExpLiterals": true,
                "ignoreUrls": true
            }
        ],
        "no-trailing-spaces": ["error", { "skipBlankLines": true }],
        "no-unused-vars": [
            "warn",
            {
                "args": "after-used",
                // Ignore vars starting with an underscore.
                "varsIgnorePattern": "^_",
                // Ignore arguments starting with an underscore.
                "argsIgnorePattern": "^_"
            }
        ],
        // Blockly uses for exporting symbols. no-self-assign added in eslint 5.
        "no-self-assign": ["off"],
        // Blockly uses single quotes except for JSON blobs, which must use double quotes.
        "quotes": ["off"],
        "semi": ["error", "always"],
        // Blockly doesn't have space before function paren when defining functions.
        "space-before-function-paren": ["error", "never"],
        // Blockly doesn't have space before function paren when calling functions.
        "func-call-spacing": ["error", "never"],
        "space-infix-ops": ["error"],
        // Blockly uses 'use strict' in files.
        "strict": ["off"],
        // Closure style allows redeclarations.
        "no-redeclare": ["off"],
        "valid-jsdoc": ["error"],
        "no-console": ["off"],
        "no-multi-spaces": ["error", { "ignoreEOLComments": true }],
        "operator-linebreak": ["error", "after"],
        "spaced-comment": ["error", "always", {
            "block": {
                "balanced": true
            },
            "exceptions": ["*"]
        }],
        // Blockly uses prefixes for optional arguments and test-only functions.
        "camelcase": ["error", {
            "properties": "never",
            "allow": ["^opt_", "^_opt_", "^testOnly_"]
        }],
        // Use clang-format for indentation by running `npm run format`.
        "indent": ["off"],
        // Blockly uses capital letters for some non-constructor namespaces.
        // Keep them for legacy reasons.
        "new-cap": ["off"],
        // Mostly use default rules for brace style, but allow single-line blocks.
        "brace-style": ["error", "1tbs", { "allowSingleLine": true }],
        // Blockly uses objects as maps, but uses Object.create(null) to
        // instantiate them.
        "guard-for-in": ["off"],
        "prefer-spread": ["off"],
        "comma-dangle": ["error", {
            "arrays": "always-multiline",
            "objects": "always-multiline",
            "imports": "always-multiline",
            "exports": "always-multiline",
            "functions": "ignore"
        }]
    },
    "env": {
        "es2020": true,
        "browser": true
    },
    "globals": {
        "goog": true,
        "exports": true
    },
    "extends": [
        "eslint:recommended", "google"
    ],
    // TypeScript-specific config. Uses above rules plus these.
    "overrides": [{
        "files": ["**/*.ts", "**/*.tsx"],
        "plugins": [
            "@typescript-eslint/eslint-plugin",
            "jsdoc"
        ],
        "settings": {
            "jsdoc": {
                "mode": "typescript"
            }
        },
        "parser":  "@typescript-eslint/parser",
        "parserOptions": {
            "project": "./tsconfig.json",
            "tsconfigRootDir": ".",
            "ecmaVersion": 2020,
            "sourceType": "module"
        },
        "extends": [
            "plugin:@typescript-eslint/recommended",
            "plugin:jsdoc/recommended"
        ],
        "rules": {
            // TS rules
            // Blockly uses namespaces to do declaration merging in some cases.
            "@typescript-eslint/no-namespace": ["off"],
            // Use the updated TypeScript-specific rule.
            "no-invalid-this": ["off"],
            "@typescript-eslint/no-invalid-this": ["error"],
            // Needs decision. 601 problems.
            "@typescript-eslint/no-non-null-assertion": ["off"],
            // Use TS-specific rule.
            "no-unused-vars": ["off"],
            "@typescript-eslint/no-unused-vars": ["warn", {
                "argsIgnorePattern": "^_",
                "varsIgnorePattern": "^_"
            }],
            "func-call-spacing": ["off"],
            "@typescript-eslint/func-call-spacing": ["warn"],
            // Temporarily disable. 23 problems.
            "@typescript-eslint/no-explicit-any": ["off"],
            // Temporarily disable. 128 problems.
            "require-jsdoc": ["off"],
            // Temporarily disable. 55 problems.
            "@typescript-eslint/ban-types": ["off"],
            // Temporarily disable. 33 problems.
            "@typescript-eslint/no-empty-function": ["off"],
            // Temporarily disable. 3 problems.
            "@typescript-eslint/no-empty-interface": ["off"],

            // TsDoc rules (using JsDoc plugin)
            // Disable built-in jsdoc verifier.
            "valid-jsdoc": ["off"],
            // Don't require types in params and returns docs.
            "jsdoc/require-param-type": ["off"],
            "jsdoc/require-returns-type": ["off"],
            // params and returns docs are optional.
            "jsdoc/require-param-description": ["off"],
            "jsdoc/require-returns": ["off"],
            // Disable for now (breaks on `this` which is not really a param).
            "jsdoc/require-param": ["off"],
            // Don't auto-add missing jsdoc. Only required on exported items.
            "jsdoc/require-jsdoc": ["warn", {"enableFixer": false, "publicOnly": true}],
            // Disable because of false alarms with Closure-supported tags.
            // Re-enable after Closure is removed.
            "jsdoc/check-tag-names": ["off"],
            // Re-enable after Closure is removed. There shouldn't even be types in the TsDoc.
            // These are "types" because of Closure's @suppress {warningName}
            "jsdoc/no-undefined-types": ["off"],
            "jsdoc/valid-types": ["off"],
            // Disabled due to not handling `this`. If re-enabled, checkDestructured option
            // should be left as false.
            "jsdoc/check-param-names": ["off", {"checkDestructured": false}],
            // Allow any text in the license tag. Other checks are not relevant.
            "jsdoc/check-values": ["off"]
                       
        }
    }]
}