Provide JavaScript port of TokenStreamRewriter (#3560)

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Author: eirikur-grid

.gitignore

@@ -83,6 +83,9 @@ nbactions*.xml
 /gen4/
 /tool/playground/
 tmp/
+**/generatedCode/*.interp
+**/generatedCode/*.tokens
+**/generatedCode/*.bak
 
 # Configurable build files
 bilder.py
@@ -107,6 +110,9 @@ runtime/PHP
 # Swift binaries
 .build/
 
+# Code coverage reports
+coverage/
+
 # Cpp generated build files
 runtime/Cpp/CMakeCache.txt
 runtime/Cpp/CMakeFiles/

runtime/JavaScript/.c8rc.json

@@ -0,0 +1,10 @@
+{
+    "all": true,
+    "include": [
+        "src/antlr4/**/*.js"
+    ],
+    "reporter": [
+        "text",
+        "lcov"
+    ]
+}

runtime/JavaScript/.eslintrc.yml

@@ -14,7 +14,8 @@ parser: "@babel/eslint-parser"
 parserOptions:
   sourceType: module
   project: ['./tsconfig.json']
+  ecmaVersion: 2022
 rules:
-  no-unused-vars: ["error", {vars: "all", args: "none"}]
-  no-prototype-builtins: [ "off" ]
+  no-unused-vars: ["error", { vars: "all", args: "none" }]
+  no-prototype-builtins: ["off"]
   no-fallthrough: ["error", { "commentPattern": "no-break" }]