Add JSDoc based types

.gitignore

@@ -1,4 +1,5 @@
 .DS_Store
+*.d.ts
 *.log
 coverage/
 node_modules/

build.js

@@ -1,10 +1,12 @@
 import fs from 'fs'
 import https from 'https'
 import concat from 'concat-stream'
-import bail from 'bail'
+import {bail} from 'bail'
 import unified from 'unified'
 import html from 'rehype-parse'
+// @ts-ignore
 import select from 'hast-util-select'
+// @ts-ignore
 import toString from 'hast-util-to-string'
 import {htmlTagNames} from './index.js'
 
@@ -18,12 +20,19 @@ https.get('https://w3c.github.io/elements-of-html/', onw3c)
 // Crawl WHATWG.
 https.get('https://html.spec.whatwg.org/multipage/indices.html', onwhatwg)
 
+/**
+ * @param {import('http').IncomingMessage} response
+ */
 function onw3c(response) {
   response.pipe(concat(onconcat)).on('error', bail)
 
+  /**
+   * @param {Buffer} buf
+   */
   function onconcat(buf) {
     var nodes = select.selectAll('[scope="row"] code', proc.parse(buf))
     var index = -1
+    /** @type {string} */
     var data
 
     while (++index < nodes.length) {
@@ -38,13 +47,21 @@ function onw3c(response) {
   }
 }
 
+/**
+ * @param {import('http').IncomingMessage} response
+ */
 function onwhatwg(response) {
   response.pipe(concat(onconcat)).on('error', bail)
 
+  /**
+   * @param {Buffer} buf
+   */
   function onconcat(buf) {
     var nodes = select.selectAll('tbody th code', proc.parse(buf))
     var index = -1
+    /** @type {string?} */
     var id
+    /** @type {string} */
     var data
 
     while (++index < nodes.length) {

package.json

@@ -26,11 +26,16 @@
   "sideEffects": false,
   "type": "module",
   "main": "index.js",
+  "types": "index.d.ts",
   "files": [
+    "index.d.ts",
     "index.js"
   ],
   "devDependencies": {
-    "bail": "^1.0.0",
+    "@types/concat-stream": "^1.0.0",
+    "@types/node": "^14.0.0",
+    "@types/tape": "^4.0.0",
+    "bail": "^2.0.0",
     "c8": "^7.0.0",
     "concat-stream": "^2.0.0",
     "hast-util-select": "^4.0.0",
@@ -39,16 +44,21 @@
     "rehype-parse": "^7.0.0",
     "remark-cli": "^9.0.0",
     "remark-preset-wooorm": "^8.0.0",
+    "rimraf": "^3.0.0",
     "tape": "^5.0.0",
+    "type-coverage": "^2.0.0",
+    "typescript": "^4.0.0",
     "unified": "^9.0.0",
     "xo": "^0.38.0"
   },
   "scripts": {
+    "prepack": "npm run build && npm run format",
+    "build": "rimraf \"*.d.ts\" && tsc && type-coverage",
     "generate": "node build",
     "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
     "test-api": "node test.js",
     "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov node test.js",
-    "test": "npm run format && npm run test-coverage"
+    "test": "npm run build && npm run format && npm run test-coverage"
   },
   "prettier": {
     "tabWidth": 2,
@@ -70,5 +80,10 @@
     "plugins": [
       "preset-wooorm"
     ]
+  },
+  "typeCoverage": {
+    "atLeast": 100,
+    "detail": true,
+    "strict": true
   }
 }

tsconfig.json

@@ -0,0 +1,16 @@
+{
+  "files": ["index.js"],
+  "include": ["*.js"],
+  "compilerOptions": {
+    "target": "ES2020",
+    "lib": ["ES2020"],
+    "module": "ES2020",
+    "moduleResolution": "node",
+    "allowJs": true,
+    "checkJs": true,
+    "declaration": true,
+    "emitDeclarationOnly": true,
+    "allowSyntheticDefaultImports": true,
+    "skipLibCheck": true
+  }
+}