Initial check-in

.gitignore

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+dist
+node_modules
+package
+*.tgz

.npmignore

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+@@ -0,0 +1,10 @@
+spec
+webpack.config.js
+tsconfig.json
+src/**/*.js
+
+.vscode
+.babelrc
+.c8rc.json
+.eslintignore
+.eslintrc.json
+.project
+cspell.json

.vscode/numbered-bookmarks.json

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+{
+	"files": []
+}

ReadMe.md

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+# JavaScript + TypeScript Target Runtime for ANTLR 4
+
+[![npm version](https://img.shields.io/npm/v/antlr4)](https://www.npmjs.com/package/antlr4)
+[![Badge showing the supported LTS versions of Node.JS in the latest NPM release](https://img.shields.io/node/v-lts/antlr4)](https://www.npmjs.com/package/antlr4)
+[![npm type definitions](https://img.shields.io/npm/types/antlr4)](https://www.npmjs.com/package/antlr4)
+
+This package is a fork of the official ANTLR4 JavaScript runtime, with the following changes:
+
+- Much improved TypeScript type definitions.
+- XPath implementation.
+- Vocabulary implementation.
+- Complete Interval implementation.
+- Consistent formatting (indentation, semicolons, spaces, etc.).
+- Numerous smaller fixes (`null` instead of `undefined` and others).
+- Smaller node package (no test specs or other unnecessary files).
+
+It is a drop-in replacement of the `antlr4` package, and can be used as such. For more information about ANTLR see www.antlr.org. More details about the JavaScript/TypeScript target can be found [here](https://github.com/antlr/antlr4/blob/master/doc/javascript-target.md).

cspell.json

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+{
+    "version": "0.2",
+    "ignorePaths": [
+        ".eslintrc.json"
+    ],
+    "dictionaryDefinitions": [],
+    "dictionaries": [],
+    "words": [
+        "ANTLR"
+    ],
+    "ignoreWords": [
+        "AMBIG",
+        "Harwell",
+        "interp",
+        "localctx",
+        "precpred",
+        "recog",
+        "sempred",
+        "ttype"
+    ],
+    "import": []
+}