Add strict types

build.js

@@ -1,3 +1,7 @@
+/**
+ * @typedef {import('hast').Element} Element
+ */
+
 import fs from 'node:fs'
 import https from 'node:https'
 import concat from 'concat-stream'
@@ -7,10 +11,6 @@ import rehypeParse from 'rehype-parse'
 import {select, selectAll} from 'hast-util-select'
 import {toString} from 'hast-util-to-string'
 
-/**
- * @typedef {import('hast').Element} Element
- */
-
 const proc = unified().use(rehypeParse)
 
 https.get('https://microformats.org/wiki/existing-rel-values', onconnection)
@@ -44,6 +44,11 @@ function onconcat(buf) {
    */
   function table(name) {
     const node = select('h2:has(#' + name + ') ~ table', tree)
+
+    if (!node) {
+      throw new Error('Missing node for name `' + name + '`')
+    }
+
     /** @type {Element[]} */
     const rows = selectAll('tr', node).slice(1)
 

tsconfig.json

@@ -1,15 +1,17 @@
 {
-  "include": ["*.js"],
+  "include": ["**/**.js"],
+  "exclude": ["coverage", "node_modules"],
   "compilerOptions": {
-    "target": "ES2020",
-    "lib": ["ES2020"],
-    "module": "ES2020",
-    "moduleResolution": "node",
-    "allowJs": true,
     "checkJs": true,
     "declaration": true,
     "emitDeclarationOnly": true,
-    "allowSyntheticDefaultImports": true,
-    "skipLibCheck": true
+    "exactOptionalPropertyTypes": true,
+    "forceConsistentCasingInFileNames": true,
+    "lib": ["es2020"],
+    "module": "node16",
+    "newLine": "lf",
+    "skipLibCheck": true,
+    "strict": true,
+    "target": "es2020"
   }
 }