Add strict to tsconfig.json

lib/index.js

@@ -28,7 +28,7 @@
  * @callback Handler
  * @param {Context} ctx
  * @param {P5Node} node
- * @param {Array.<Child>} children
+ * @param {Array.<Child>} [children]
  * @returns {Node}
  *
  * @typedef Options
@@ -38,8 +38,8 @@
  *
  * @typedef Context
  * @property {Schema} schema
- * @property {VFile} file
- * @property {boolean} verbose
+ * @property {VFile|undefined} file
+ * @property {boolean|undefined} verbose
  * @property {boolean} location
  */
 
@@ -68,7 +68,7 @@ const map = {
 export function fromParse5(ast, options = {}) {
   /** @type {Options} */
   let settings
-  /** @type {VFile} */
+  /** @type {VFile|undefined} */
   let file
 
   if (isFile(options)) {
@@ -100,8 +100,9 @@ export function fromParse5(ast, options = {}) {
 function transform(ctx, ast) {
   const schema = ctx.schema
   /** @type {Handler} */
+  // @ts-expect-error: index is fine.
   const fn = own.call(map, ast.nodeName) ? map[ast.nodeName] : element
-  /** @type {Array.<Child>} */
+  /** @type {Array.<Child>|undefined} */
   let children
 
   // Element.
@@ -116,7 +117,7 @@ function transform(ctx, ast) {
   const result = fn(ctx, ast, children)
 
   if ('sourceCodeLocation' in ast && ast.sourceCodeLocation && ctx.file) {
-    // @ts-ignore It’s fine.
+    // @ts-expect-error It’s fine.
     const position = location(ctx, result, ast.sourceCodeLocation)
 
     if (position) {
@@ -143,7 +144,7 @@ function nodes(ctx, children) {
   const result = []
 
   while (++index < children.length) {
-    // @ts-ignore Assume no roots in children.
+    // @ts-expect-error Assume no roots in children.
     result[index] = transform(ctx, children[index])
   }
 
@@ -186,7 +187,7 @@ function root(ctx, ast, children) {
  * @returns {Doctype}
  */
 function doctype() {
-  // @ts-ignore Types are out of date.
+  // @ts-expect-error Types are out of date.
   return {type: 'doctype'}
 }
 
@@ -235,17 +236,19 @@ function element(ctx, ast, children) {
   const result = fn(ast.tagName, props, children)
 
   if (result.tagName === 'template' && 'content' in ast) {
-    // @ts-ignore Types are wrong.
     const pos = ast.sourceCodeLocation
-    const start = pos && pos.startTag && position(pos.startTag).end
-    const end = pos && pos.endTag && position(pos.endTag).start
+    const startTag = pos && pos.startTag && position(pos.startTag)
+    const endTag = pos && pos.endTag && position(pos.endTag)
 
-    // @ts-ignore Types are wrong.
-    result.content = transform(ctx, ast.content)
+    /** @type {Root} */
+    // @ts-expect-error Types are wrong.
+    const content = transform(ctx, ast.content)
 
-    if ((start || end) && ctx.file) {
-      result.content.position = {start, end}
+    if (startTag && endTag && ctx.file) {
+      content.position = {start: startTag.end, end: endTag.start}
     }
+
+    result.content = content
   }
 
   return result
@@ -257,7 +260,7 @@ function element(ctx, ast, children) {
  * @param {Context} ctx
  * @param {Node} node
  * @param {P5ElementLocation} location
- * @returns {Position}
+ * @returns {Position|null}
  */
 function location(ctx, node, location) {
   const result = position(location)
@@ -267,12 +270,18 @@ function location(ctx, node, location) {
 
     // Bug for unclosed with children.
     // See: <https://github.com/inikulin/parse5/issues/109>.
-    if (!location.endTag && tail && tail.position && tail.position.end) {
+    if (
+      result &&
+      !location.endTag &&
+      tail &&
+      tail.position &&
+      tail.position.end
+    ) {
       result.end = Object.assign({}, tail.position.end)
     }
 
     if (ctx.verbose) {
-      /** @type {Object.<string, Position>} */
+      /** @type {Object.<string, Position|null>} */
       const props = {}
       /** @type {string} */
       let key
@@ -311,6 +320,7 @@ function position(loc) {
     column: loc.endCol,
     offset: loc.endOffset
   })
+  // @ts-expect-error `null` is fine.
   return start || end ? {start, end} : null
 }
 

test/index.js

@@ -15,6 +15,7 @@ import test from 'tape'
 import {isHidden} from 'is-hidden'
 import parse5 from 'parse5'
 import {visit} from 'unist-util-visit'
+// @ts-expect-error: to do type.
 import vfile from 'to-vfile'
 import {fromParse5} from '../index.js'
 
@@ -232,11 +233,11 @@ test('hast-util-from-parse5', (t) => {
           {
             nodeName: '#text',
             value: 'Hello!',
-            // @ts-ignore runtime.
+            // @ts-expect-error runtime.
             sourceCodeLocation: {}
           }
         ],
-        // @ts-ignore runtime.
+        // @ts-expect-error runtime.
         sourceCodeLocation: {
           startLine: 1,
           startCol: 1,
@@ -268,7 +269,7 @@ test('hast-util-from-parse5', (t) => {
         attrs: [],
         namespaceURI: 'http://www.w3.org/1999/xhtml',
         childNodes: [
-          // @ts-ignore runtime.
+          // @ts-expect-error runtime.
           {
             nodeName: '#text',
             value: 'Hello!',
@@ -282,7 +283,7 @@ test('hast-util-from-parse5', (t) => {
             }
           }
         ],
-        // @ts-ignore runtime.
+        // @ts-expect-error runtime.
         sourceCodeLocation: {
           startLine: 1,
           startCol: 1,
@@ -472,23 +473,22 @@ test('fixtures', (t) => {
  * @param {Node} tree
  */
 function clean(tree) {
-  visit(tree, cleaner)
-}
-
-/**
- * @param {Node} node
- */
-function cleaner(node) {
-  delete node.position
-
-  // Remove verbose data.
-  if (node.type === 'element') {
-    delete node.data
-
-    if ('content' in node) {
-      clean(node.content)
+  visit(
+    tree,
+    // @ts-expect-error: hush.
+    /** @type {import('unist-util-visit').Visitor<Node>} */ (node) => {
+      delete node.position
+
+      // Remove verbose data.
+      if (node.type === 'element') {
+        delete node.data
+
+        if (node.content) {
+          clean(node.content)
+        }
+      }
     }
-  }
+  )
 }
 
 /**

tsconfig.json

@@ -10,6 +10,7 @@
     "declaration": true,
     "emitDeclarationOnly": true,
     "allowSyntheticDefaultImports": true,
-    "skipLibCheck": true
+    "skipLibCheck": true,
+    "strict": true
   }
 }