.eslintrc.json

 {
-  "extends": ["@html-validate", "plugin:security/recommended", "plugin:sonarjs/recommended"],
-  "plugins": ["security", "sonarjs"],
+  "extends": ["@html-validate"],
 
   "rules": {
-    "import/named": "off",
-    "node/no-unsupported-features/es-syntax": "off",
-    "security/detect-non-literal-fs-filename": "off",
     "security/detect-non-literal-require": "off",
     "security/detect-object-injection": "off",
     "security/detect-unsafe-regex": "off"
@@ -17,7 +13,6 @@
       "extends": ["@html-validate/typescript"],
       "rules": {
         "@typescript-eslint/no-explicit-any": "off",
-        "@typescript-eslint/no-use-before-define": "off",
         "@typescript-eslint/no-var-requires": "off"
       }
     },
@@ -26,10 +21,8 @@
       "excludedFiles": "cypress/**",
       "extends": ["@html-validate/jest"],
       "rules": {
-        "sonarjs/no-duplicate-string": "off",
         "sonarjs/no-identical-functions": "off",
-        "@typescript-eslint/no-non-null-assertion": "off",
-        "tsdoc/syntax": "off"
+        "@typescript-eslint/no-non-null-assertion": "off"
       }
     }
   ]

.gitlab-ci.yml

@@ -106,10 +106,6 @@ Docs:
     - npm run --if-present build
     - npm run compatibility
 
-Node 10.x:
-  <<: *compat
-  image: node:10
-
 Node 12.x (LTS):
   <<: *compat
   image: node:12

CHANGELOG.md

 # html-validate changelog
 
+## [5.0.0](https://gitlab.com/html-validate/html-validate/compare/v4.14.0...v5.0.0) (2021-06-27)
+
+### ⚠ BREAKING CHANGES
+
+- the library is now shipped as a hybrid CJS/ESM package. If you
+  are simply consuming the CLI tool or one of the existing integrations this will
+  not affect you.
+
+For plugin developers and if you consume the API in any way the biggest change
+is that the distributed source is now bundled and you can no longer access
+individual files.
+
+Typically something like:
+
+```diff
+-import foo from "html-validate/dist/foo";
++import { foo } from "html-validate"
+```
+
+Feel free to open an issue if some symbol you need isn't exported.
+
+If your usage includes checking presence of rules use the `ruleExists` helper:
+
+```diff
+-try {
+-  require("html-validate/dist/rules/attr-case");
+-} catch (err) {
+-  /* fallback */
+-}
++import { ruleExists } from "html-validate";
++if (!ruleExists("attr-case")) {
++  /* fallback */
++}
+```
+
+- drop support for NodeJS 10
+
+### Features
+
+- add `compatibilityCheck` helper for plugins ([4758595](https://gitlab.com/html-validate/html-validate/commit/47585951e7faf026bccc228d537f678d69da1c8a))
+- cjs/esm hybrid package ([39c960a](https://gitlab.com/html-validate/html-validate/commit/39c960a19f47cedcb55edf0865a3e6bd174a61f6)), closes [#112](https://gitlab.com/html-validate/html-validate/issues/112)
+- drop support for NodeJS 10 ([8f74291](https://gitlab.com/html-validate/html-validate/commit/8f74291919e1bcdab88ae6b74ba4199b16a4ef54))
+
+### Dependency upgrades
+
+- **deps:** update dependency ajv to v8 ([cccb73a](https://gitlab.com/html-validate/html-validate/commit/cccb73ad33db7f8032ecef469dc77a3df24eb29f))
+
 ## [4.14.0](https://gitlab.com/html-validate/html-validate/compare/v4.13.1...v4.14.0) (2021-06-14)
 
 ### Features

README.md

@@ -13,6 +13,22 @@ Offline HTML5 validator. Validates either a full document or a smaller
 - Strict and non-forgiving parsing. It will not try to correct any incorrect
   markup or guess what it should do.
 
+## Bundles
+
+The library comes in four flavours:
+
+- CommonJS full (`dist/cjs/main.js`)
+- CommonJS browser (`dist/cjs/browser.js`)
+- ESM full (`dist/es/main.js`)
+- ESM browser (`dist/es/browser.js`)
+
+The browser versions contains a slimmed version without CLI dependencies.
+Your tooling will probably use the correct version but if needed you can import the files directly.
+
+Do note that to run in a browser you still need to polyfill the `fs` nodejs library.
+
+Browsers and bundlers are currently not 100% supported but is possible with some tricks, see [running in browser](https://html-validate.org/dev/running-in-browser.html) for more details.
+
 ## Usage
 
     npm install -g html-validate
@@ -52,7 +68,14 @@ Create `.htmlvalidate.json`:
   6:4  error  Unexpected close-tag, expected opening tag          close-order
 ```
 
-## Test
+## Developing
+
+### Prerequisites
+
+- NodeJS 12
+- NPM 7
+
+### Test
 
 Testing is done using jest.
 
@@ -62,7 +85,7 @@ or call `jest` directly.
 
 Some tests are autogenerated from documentation examples, use `npm run build:docs` to build those before running.
 
-## Lint
+### Lint
 
 Linting is done using ESLint.
 
@@ -70,7 +93,7 @@ Linting is done using ESLint.
 
 or call `eslint` directly.
 
-## Build
+### Build
 
     npm run build
 

bin/html-validate.js

 #!/usr/bin/env node
 "use strict";
 
-require("../dist/cli/html-validate");
+require("../dist/cjs/html-validate");

docs/dev/running-in-browser.md

+---
+docType: content
+title: Running in a browser
+---
+
+# Running in a browser
+
+While primarly developed as a NodeJS CLI/backend tool it is possible to run `html-validate` in a browser as well.
+
+<div class="alert alert-info">
+	<i class="fa fa-info-circle" aria-hidden="true"></i>
+	<strong>Note</strong>
+	<p>While it is possible to get <code>html-validate</code> running in a browser it is currently not supported and requires a few workarounds.</p>
+</div>
+
+Improvements are welcome!
+
+## Example
+
+There is an example project [try-online-repo] running at [try-online-url] showing that it can be done and the workarounds required.
+
+[try-online-repo]: https://gitlab.com/html-validate/try-online
+[try-online-url]: https://online.html-validate.org/
+
+## Configuration loading
+
+By default `html-validate` will traverse the filesystem looking for configuration files (e.g. `.htmlvalidate.json`).
+This is true even when using `validateString(..)`.
+
+This will manifest itself with errors such as:
+
+- `Cannot find module 'fs'`
+- `Cannot read property 'existsSync' of undefined`
+- `fs_1.default.existsSync is not a function`
+
+### Workaround 1: prevent loader from trying to access filesystem
+
+By far the easiest method is to pass a config to the [[HtmlValidate]] constructor with the `root` property to `true`:
+
+```ts
+import { HtmlValidate } from "html-validate";
+
+const htmlvalidate = new HtmlValidate({
+  root: true,
+  extends: ["html-validate:recommended"],
+});
+```
+
+Do note that no default configuration will be loaded either so you must explicitly enable rules or extend a preset.
+
+### Workaround 2:
+
+If you are emulating or providing virtual access to a filesystem you can ensure the `fs` module is implemented.
+There is no exhaustive list of functions which must be added.
+
+If you are using webpack you can use `resolve.alias` to implement this:
+
+```js
+module.exports = {
+  resolve: {
+    alias: {
+      fs$: path.resolve(__dirname, "src/my-fs.js"),
+    },
+  },
+};
+```
+
+## Bundled files
+
+The `html-validate` NPM package contains a few data files such as `elements/html.json`.
+These files are dynamically imported and will most likely not be picked up by your bundler.
+Either you need to ensure the bundler picks up the files or the configuration loader does not need to import thme.
+
+- `elements/*.json`
+
+This will manifest itself with errors such as:
+
+- `Error: Failed to load elements from "html5": Cannot find module 'html5'`
+
+This is typically archived by passing an object instead of a string when configuring `html-validate`:
+
+```diff
+ import { HtmlValidate } from "html-validate";
+
++// check your loader! it must return a plain object (not `default: { ... }`, a path/url, etc)
++import html5 from "html-validate/elements/html5.json";
+
+ const htmlvalidate = new HtmlValidate({
+   root: true,
+   extends: ["html-validate:recommended"],
+-  elements: ["html5"],
++  elements: [html5]
+});
+```
+
+## Webpack
+
+Internally there are many dynamic imports and `fs` access.
+
+You will see warnings such as:
+
+    WARNING in ./node_modules/html-validate/dist/config/config.js 81:25-50
+    Critical dependency: the request of a dependency is an expression
+
+In many cases there is no way to avoid the warning per se but the workaround above are implemented the code paths triggering these issues are not hit.

docs/dev/transformers.md

@@ -83,7 +83,7 @@ This is useful when the transformer needs to deal with multiple languages and th
 Extracts templates from javascript sources.
 
 ```typescript
-const TemplateExtractor = require("html-validate").TemplateExtractor;
+const { TemplateExtractor } = require("html-validate");
 const te = TemplateExtractor.fromFilename("my-file.js");
 
 /* finds any {template: '...'} */

docs/dev/using-api.md

@@ -94,26 +94,24 @@ HTML-validate comes with a number of builtin formatters:
 - `stylish`
 - `text`
 
-Formatters work on the `results` property in a report and all returns a
-formatted string:
+Formatters work on the `results` property in a report and all returns a formatted string:
 
 ```typescript
-import { HtmlValidate } from "html-validate";
-import text from "html-validate/dist/formatters/text";
+import { HtmlValidate, formatterFactory } from "html-validate";
 
 const htmlvalidate = new HtmlValidate();
 const report = htmlvalidate.validateFile("myfile.html");
+const text = formatterFactory("text");
 
 console.log(text(report.results));
 ```
 
-Using the CLI API there is a factory function to retrieve formatters (see
-`html-validate --help` for details about the format):
+Using the CLI API there is a factory function to retrieve formatters (see `html-validate --help` for details about the format):
 
 ```typescript
-import { getFormatter } from "html-validate/dist/cli/formatter";
+import { formatterFactory } from "html-validate";
 
-const stylish = getFormatter("stylish");
+const stylish = formatterFactory("stylish");
 console.log(stylish(report));
 ```
 

docs/dev/writing-plugins.md

@@ -329,3 +329,29 @@ The resulting metadata will now be:
   "bar": "original"
 }
 ```
+
+### Version compatibility
+
+- Since: 5.0.0
+
+Plugins can use the `compatibilityCheck` helper to verify the library version is compatible.
+
+```typescript
+import { compatibilityCheck } from "html-validate";
+
+const pkg = require("./package.json");
+const range = pkg.peerDependencies["html-validate"];
+
+compatibilityCheck(pkg.name, range);
+```
+
+The helper will write a friendly notice on console if the version is not supported.
+
+If you want the error to be fatal you it returns `false` if the version is not supported.
+Additionally you can pass the `silent` option if you want to disable output`
+
+```typescript
+if (!compatibilityCheck(pkg.name, range, { silent: true })) {
+  /* handle incompatible version */
+}
+```

docs/dgeni/inline-validate/processors/validate-results.js

 const kleur = require("kleur");
-const HtmlValidate = require("../../../../dist/htmlvalidate").default;
-const codeframe = require("../../../../dist/formatters/codeframe").codeframe;
+const { HtmlValidate, formatterFactory } = require("../../../../dist/cjs");
+
+const codeframe = formatterFactory("codeframe");
 
 const formatterOptions = {
 	showLink: false,

docs/dgeni/processors/rules.js

-const a17y = require("../../../dist/config/presets/a17y");
-const document = require("../../../dist/config/presets/document");
-const recommended = require("../../../dist/config/presets/recommended");
-const standard = require("../../../dist/config/presets/standard");
+const { configPresets } = require("../../../dist/cjs");
 
 /* sort order */
 const availablePresets = ["recommended", "standard", "a17y", "document"];
 
-/* preset configuration */
-const presets = {
-	a17y,
-	document,
-	recommended,
-	standard,
-};
-
 function compareName(a, b) {
 	if (a.name < b.name) {
 		return -1;
@@ -59,7 +48,8 @@ module.exports = function rulesProcessor(renderDocsProcessor) {
 				category: doc.category,
 				summary: doc.summary,
 				presets: availablePresets.reduce((result, presetName) => {
-					const config = presets[presetName];
+					const key = `html-validate:${presetName}`;
+					const config = configPresets[key];
 					if (config && config.rules) {
 						result[presetName] = Boolean(config.rules[doc.name]);
 					}

docs/dgeni/templates/base.template.html

@@ -74,6 +74,7 @@
 									<li><a href="{{ pkg.bugs.url }}">File issue</a></li>
 									<li role="separator" class="divider"></li>
 									<li>{@link dev/using-api Using API}</li>
+									<li>{@link dev/running-in-browser Running in a browser}</li>
 									<li>{@link dev/writing-rules Writing rules}</li>
 									<li>{@link dev/writing-plugins Writing plugins}</li>
 									<li>{@link dev/transformers Writing transformers}</li>

jest.d.ts

 /* eslint-disable-next-line import/export, import/no-unresolved */
-export * from "./dist/matchers";
+export * from "./dist/cjs/matchers";

jest.js

-module.exports = require("./dist/matchers");
+module.exports = require("./dist/cjs/matchers");

package.json

 {
   "name": "html-validate",
-  "version": "4.14.0",
-  "description": "html linter",
+  "version": "5.0.0",
+  "description": "Offline html5 validator",
   "keywords": [
     "html",
     "lint",
@@ -19,8 +19,23 @@
   "license": "MIT",
   "author": "David Sveningsson <ext@sidvind.com>",
   "sideEffects": false,
-  "main": "dist/main.js",
-  "browser": "dist/browser.js",
+  "type": "commonjs",
+  "exports": {
+    ".": {
+      "require": "./dist/cjs/index.js",
+      "import": "./dist/es/index.js"
+    },
+    "./dist/cjs/*": "./dist/cjs/*",
+    "./dist/es/*": "./dist/es/*",
+    "./dist/schema/*": "./dist/schema/*",
+    "./elements/*": "./elements/*",
+    "./jest.js": "./jest.js",
+    "./package.json": "./package.json",
+    "./test-utils.js": "./test-utils.js"
+  },
+  "main": "dist/cjs/index.js",
+  "module": "dist/es/index.js",
+  "browser": "dist/cjs/browser.js",
   "bin": {
     "html-validate": "bin/html-validate.js"
   },
@@ -30,17 +45,14 @@
     "elements",
     "jest.{js,d.ts}",
     "test-utils.{js,d.ts}",
-    "!**/*.map",
+    "!dist/types/**",
     "!**/*.snap",
-    "!**/*.spec.d.ts",
-    "!**/*.spec.js",
-    "!**/*.spec.ts",
-    "!**/__fixtures__",
-    "!**/__mocks__",
-    "!dist/rules/**/*.d.ts"
+    "!**/*.spec.{js,ts,d.ts}"
   ],
   "scripts": {
-    "build": "tsc",
+    "prebuild": "tsc",
+    "build": "rollup --config rollup.config.js",
+    "postbuild": "scripts/pkg",
     "build:docs": "grunt docs",
     "clean": "rm -rf dist public",
     "compatibility": "scripts/compatibility.sh",
@@ -102,7 +114,7 @@
       "src/**/*.ts",
       "!src/**/*.spec.ts",
       "!src/**/index.ts",
-      "!src/main.ts",
+      "!src/index.ts",
       "!src/browser.ts",
       "!src/cli/html-validate.ts"
     ],
@@ -112,9 +124,6 @@
       "<rootDir>/elements",
       "<rootDir>/src",
       "<rootDir>/tests"
-    ],
-    "snapshotSerializers": [
-      "pretty-format/build/plugins/ConvertAnsi"
     ]
   },
   "dependencies": {
@@ -122,7 +131,7 @@
     "@html-validate/stylish": "^1.0.0",
     "@sidvind/better-ajv-errors": "^0.9.0",
     "acorn-walk": "^8.0.0",
-    "ajv": "^7.0.0",
+    "ajv": "^8.0.0",
     "deepmerge": "^4.2.0",
     "espree": "^7.3.0",
     "glob": "^7.1.0",
@@ -130,30 +139,36 @@
     "json-merge-patch": "^1.0.0",
     "kleur": "^4.1.0",
     "minimist": "^1.2.0",
-    "prompts": "^2.0.0"
+    "prompts": "^2.0.0",
+    "semver": "^7.0.0"
   },
   "devDependencies": {
-    "@babel/core": "7.14.5",
-    "@babel/preset-env": "7.14.5",
+    "@babel/core": "7.14.6",
+    "@babel/preset-env": "7.14.7",
     "@commitlint/cli": "12.1.4",
     "@html-validate/commitlint-config": "1.3.1",
-    "@html-validate/eslint-config": "4.4.1",
+    "@html-validate/eslint-config": "4.4.3",
     "@html-validate/eslint-config-jest": "4.4.2",
     "@html-validate/eslint-config-typescript": "4.4.0",
-    "@html-validate/jest-config": "1.2.10",
+    "@html-validate/jest-config": "2.2.0",
     "@html-validate/prettier-config": "1.1.0",
-    "@html-validate/semantic-release-config": "1.2.15",
+    "@html-validate/semantic-release-config": "2.0.0",
     "@lodder/grunt-postcss": "3.0.1",
+    "@rollup/plugin-json": "4.1.0",
+    "@rollup/plugin-replace": "2.4.2",
+    "@rollup/plugin-typescript": "8.2.1",
+    "@rollup/plugin-virtual": "2.0.3",
     "@types/babar": "0.2.0",
     "@types/babel__code-frame": "7.0.2",
     "@types/estree": "0.0.47",
     "@types/glob": "7.1.3",
-    "@types/inquirer": "7.3.1",
+    "@types/inquirer": "7.3.2",
     "@types/jest": "26.0.23",
     "@types/json-merge-patch": "0.0.5",
     "@types/minimist": "1.2.1",
     "@types/node": "11.15.54",
     "@types/prompts": "2.0.13",
+    "@types/semver": "7.3.6",
     "autoprefixer": "10.2.6",
     "babar": "0.2.0",
     "babelify": "10.0.0",
@@ -161,11 +176,9 @@
     "canonical-path": "1.0.0",
     "cssnano": "5.0.6",
     "dgeni": "0.4.14",
-    "dgeni-front-matter": "2.0.3",
+    "dgeni-front-matter": "3.0.0",
     "dgeni-packages": "0.29.1",
-    "eslint": "7.28.0",
-    "eslint-plugin-security": "1.4.0",
-    "eslint-plugin-sonarjs": "0.7.0",
+    "eslint": "7.29.0",
     "font-awesome": "4.7.0",
     "front-matter": "4.0.2",
     "grunt": "1.4.1",
@@ -176,23 +189,25 @@
     "grunt-sass": "3.1.0",
     "highlight.js": "11.0.1",
     "husky": "6.0.0",
-    "jest": "27.0.4",
+    "jest": "27.0.5",
     "jest-diff": "27.0.2",
     "jquery": "3.6.0",
     "lint-staged": "11.0.0",
     "load-grunt-tasks": "5.1.0",
-    "marked": "2.0.7",
+    "marked": "2.1.3",
     "minimatch": "3.0.4",
-    "npm-pkg-lint": "1.3.0",
-    "postcss": "8.3.2",
+    "npm-pkg-lint": "1.4.0",
+    "postcss": "8.3.5",
     "prettier": "2.3.1",
-    "pretty-format": "27.0.2",
-    "sass": "1.34.1",
-    "semantic-release": "17.4.3",
+    "rollup": "2.52.3",
+    "rollup-plugin-copy": "3.4.0",
+    "rollup-plugin-dts": "3.0.2",
+    "sass": "1.35.1",
+    "semantic-release": "17.4.4",
     "serve-static": "1.14.1",
     "stringmap": "0.2.2",
     "ts-jest": "27.0.3",
-    "typescript": "4.3.2"
+    "typescript": "4.3.4"
   },
   "peerDependencies": {
     "jest": "^24 || ^25 || ^26 || ^27"
@@ -203,7 +218,7 @@
     }
   },
   "engines": {
-    "node": ">= 10.0"
+    "node": ">= 12.0"
   },
   "release": {
     "extends": "@html-validate/semantic-release-config"

rollup.config.js

+import fs from "fs";
+import path from "path";
+import json from "@rollup/plugin-json";
+import replace from "@rollup/plugin-replace";
+import virtual from "@rollup/plugin-virtual";
+import copy from "rollup-plugin-copy";
+import dts from "rollup-plugin-dts";
+import typescript from "@rollup/plugin-typescript";
+
+/**
+ * @typedef {import('rollup').RollupOptions} RollupOptions
+ */
+
+/** @type {string[]} */
+const entrypoints = [
+	"src/index.ts",
+	"src/browser.ts",
+	"src/cli/html-validate.ts",
+	"src/matchers.ts",
+	"src/transform/test-utils.ts",
+];
+
+/** @type {string[]} */
+const types = [
+	"dist/types/index.d.ts",
+	"dist/types/browser.d.ts",
+	"dist/types/matchers.d.ts",
+	"dist/types/transform/test-utils.d.ts",
+];
+
+/** @type {string[]} */
+const inputs = [...entrypoints, ...types];
+
+/** @type {string[]} */
+const external = [
+	/* nodejs */
+	"fs",
+	"path",
+
+	/* dependencies */
+	"@babel/code-frame",
+	"@html-validate/stylish",
+	"@sidvind/better-ajv-errors",
+	"ajv",
+	"deepmerge",
+	"glob",
+	"ignore",
+	"jest-diff",
+	"json-merge-patch",
+	"kleur",
+	"minimist",
+	"prompts",
+];
+
+const packageJson = fs.readFileSync(path.join(__dirname, "package.json"), "utf-8");
+
+/**
+ * @param {string} id
+ * @returns {string|undefined}
+ */
+function manualChunks(id) {
+	/** @type {string} */
+	const base = path.relative(__dirname, id);
+	if (inputs.includes(base)) {
+		return undefined;
+	}
+
+	/** @type {string} */
+	const rel = base.startsWith("src/")
+		? path.relative(path.join(__dirname, "src"), id)
+		: path.relative(path.join(__dirname, "dist/types"), id);
+
+	if (rel.startsWith("cli/")) {
+		return "cli";
+	}
+
+	return "core";
+}
+
+/**
+ * @param {string} format
+ * @returns {RollupOptions[]}
+ */
+function build(format) {
+	const resolved = `
+		import path from "path";
+		export const projectRoot = path.resolve(__dirname, "../../");
+		export const distFolder = path.resolve(projectRoot, "dist/${format}");
+	`;
+	return [
+		{
+			input: entrypoints,
+			output: {
+				dir: `dist/${format}`,
+				format,
+				sourcemap: true,
+				manualChunks,
+				chunkFileNames: "[name].js",
+			},
+			external,
+			plugins: [
+				virtual({
+					"package.json": packageJson,
+					"src/resolve": resolved,
+				}),
+				typescript({
+					outDir: `dist/${format}`,
+					declaration: false,
+					declarationDir: undefined,
+				}),
+				json(),
+				replace({
+					preventAssignment: true,
+					delimiters: ["", ""],
+					values: {
+						/**
+						 * Fix the path from src/package.ts
+						 */
+						'"../package.json"': '"../../package.json"',
+						/**
+						 * Replace __filename global with source filename relative to dist folder
+						 *
+						 * @param {string} filename
+						 */
+						__filename: (filename) => {
+							const relative = path.relative(path.join(__dirname, "src"), filename);
+							return `"@/${relative}"`;
+						},
+					},
+				}),
+			],
+		},
+		{
+			input: types,
+			output: {
+				dir: `dist/${format}`,
+				format,
+				manualChunks,
+				chunkFileNames: "[name].d.ts",
+			},
+			plugins: [
+				dts(),
+				copy({
+					verbose: true,
+					targets: [{ src: "src/schema/*.json", dest: "dist/schema" }],
+				}),
+			],
+		},
+	];
+}
+
+/** @type {RollupOptions[]} */
+export default [...build("cjs"), ...build("es")];

scripts/pkg

+#!/bin/sh
+
+cat > dist/cjs/package.json <<EOF
+{
+    "type": "commonjs"
+}
+EOF
+
+cat > dist/es/package.json <<EOF
+{
+    "type": "module"
+}
+EOF

src/browser.ts

@@ -2,19 +2,17 @@
 
 export { default as HtmlValidate } from "./htmlvalidate";
 export { AttributeData } from "./parser";
-export { Config, ConfigData, ConfigError, ConfigLoader, Severity } from "./config";
+export { Config, ConfigData, ConfigError, ConfigLoader, Severity, configPresets } from "./config";
 export { DynamicValue, HtmlElement, NodeClosed, TextNode } from "./dom";
-export { UserError } from "./error";
+export { EventDump, TokenDump } from "./engine";
+export { UserError, SchemaValidationError } from "./error";
 export * from "./event";
-export { MetaData, MetaElement, MetaTable } from "./meta";
+export { MetaData, MetaElement, MetaTable, MetaCopyableProperty } from "./meta";
 export { Rule, RuleDocumentation } from "./rule";
 export { Source, Location, ProcessElementContext } from "./context";
 export { Report, Reporter, Message, Result } from "./reporter";
-export { Transformer, TemplateExtractor } from "./transform";
+export { TransformContext, Transformer, TemplateExtractor } from "./transform";
 export { Plugin } from "./plugin";
 export { Parser } from "./parser";
 export { ruleExists } from "./utils";
-
-const pkg = require("../package.json");
-
-export const version = pkg.version;
+export { version } from "./package";

src/cli/cli.ts

 import { readFileSync } from "fs";
-import { ConfigData } from "../config";
-import { UserError } from "../error";
-import HtmlValidate from "../htmlvalidate";
-import { Report } from "../reporter";
+import { ConfigData, UserError, HtmlValidate, Report } from "..";
 import { expandFiles, ExpandOptions } from "./expand-files";
 import { getFormatter } from "./formatter";
 import { IsIgnored } from "./is-ignored";