Refactor rest of src/ as TypeScript

.eslintrc.yaml

@@ -1,34 +1,38 @@
 root: true
-parser: babel-eslint
+parser: "@typescript-eslint/parser"
 env:
   node: true
 
+plugins:
+  - "@typescript-eslint"
+
 extends:
   - eslint:recommended
+  - plugin:@typescript-eslint/recommended
   - prettier
 
 rules:
   array-callback-return: error
   camelcase: error
-  consistent-return: error
-  eqeqeq: [error, always, 'null': ignore]
+  consistent-return: 0
+  eqeqeq: [error, always, "null": ignore]
   no-constant-condition: [error, checkLoops: false]
   no-control-regex: 0
+  no-fallthrough: [error, commentPattern: fallthrough]
   no-implicit-globals: error
   no-template-curly-in-string: warn
-  no-unused-labels: 0
   no-var: error
   prefer-const: [warn, destructuring: all]
+  "@typescript-eslint/ban-ts-comment": off
+  "@typescript-eslint/explicit-module-boundary-types": off
+  "@typescript-eslint/no-explicit-any": off
+  "@typescript-eslint/no-namespace": off
+  "@typescript-eslint/no-unused-vars": off
+  "@typescript-eslint/no-unused-vars-experimental": warn
 
 overrides:
-  - files: src/**/*.js
-    env:
-      es6: true
-      node: false
-  - files:
-      - tests/**/*.js
+  - files: [tests/**]
     env:
-      es6: true
       jest: true
     rules:
       camelcase: 0

babel.config.js

@@ -1,13 +1,22 @@
 module.exports = {
-  plugins: [
-    '@babel/plugin-proposal-class-properties',
-    '@babel/plugin-proposal-nullish-coalescing-operator',
-    ['babel-plugin-trace', { strip: true }]
+  overrides: [
+    {
+      test: /\.js$/,
+      plugins: [
+        '@babel/plugin-proposal-class-properties',
+        '@babel/plugin-proposal-nullish-coalescing-operator'
+      ]
+    },
+    {
+      test: /\.ts$/,
+      plugins: [
+        ['@babel/plugin-transform-typescript', { allowDeclareFields: true }],
+        '@babel/plugin-proposal-class-properties',
+        '@babel/plugin-proposal-nullish-coalescing-operator'
+      ]
+    }
   ]
 }
 
 if (process.env.NODE_ENV === 'test')
-  module.exports.presets = [
-    ['@babel/env', { targets: { node: 'current' } }],
-    '@babel/preset-typescript'
-  ]
+  module.exports.presets = [['@babel/env', { targets: { node: 'current' } }]]

docs/04_documents.md

@@ -63,7 +63,11 @@ The `contents` of a parsed document will always consist of `Scalar`, `Map`, `Seq
 
 #### `new YAML.Document(value, replacer?, options = {})`
 
-Creates a new document. If `value` is defined, the document `contents` are initialised with that value, wrapped recursively in appropriate [content nodes](#content-nodes). If `value` is `undefined`, the document's `contents` and `schema` are initialised as `null`. If defined, a `replacer` may filter or modify the initial document contents, following the same algorithm as the [JSON implementation](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#The_replacer_parameter). See [Options](#options) for more information on the last argument.
+Creates a new document.
+If `value` is defined, the document `contents` are initialised with that value, wrapped recursively in appropriate [content nodes](#content-nodes).
+If `value` is `undefined`, the document's `contents` is initialised as `null`.
+If defined, a `replacer` may filter or modify the initial document contents, following the same algorithm as the [JSON implementation](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#The_replacer_parameter).
+See [Options](#options) for more information on the last argument.
 
 | Member              | Type                                | Description                                                                                                                                                              |
 | ------------------- | ----------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |

index.d.ts

@@ -1,2 +1 @@
 export * from './dist/index'
-export { AST } from './dist/ast/index'

jest.config.js

@@ -21,10 +21,10 @@ switch (process.env.npm_lifecycle_event) {
   default:
     process.env.TRACE_LEVEL = 'log'
     moduleNameMapper = {
-      '^\\./dist$': '<rootDir>/src/index.js',
-      '^\\./dist/types(\\.js)?$': '<rootDir>/src/types.js',
+      '^\\./dist$': '<rootDir>/src/index.ts',
+      '^\\./dist/types(\\.js)?$': '<rootDir>/src/types.ts',
       '^\\./dist/(.+)$': '<rootDir>/src/$1',
-      '^\\.\\./dist/test-events.js$': '<rootDir>/src/test-events.js'
+      '^\\.\\./dist/test-events.js$': '<rootDir>/src/test-events.ts'
     }
 }
 
@@ -33,7 +33,7 @@ module.exports = {
   moduleNameMapper,
   resolver: 'jest-ts-webcompat-resolver',
   testEnvironment: 'node',
-  testMatch: ['**/tests/**/*.{js,ts}', '!**/tests/typings.ts'],
+  testMatch: ['**/tests/**/*.{js,ts}'],
   testPathIgnorePatterns,
   transform: { '/(src|tests)/.*\\.(js|ts)$': 'babel-jest' }
 }