Add strict to tsconfig.json

Author: wooorm

index.js

@@ -35,14 +35,31 @@ export function positionFromEstree(value) {
 
   return {
     start: {
-      line: loc.start && loc.start.line > -1 ? loc.start.line : null,
-      column: loc.start && loc.start.column > -1 ? loc.start.column + 1 : null,
-      offset: startOffset > -1 ? startOffset : null
+      // @ts-expect-error: return no point / no position next major.
+      line:
+        loc.start && loc.start.line !== undefined && loc.start.line > -1
+          ? loc.start.line
+          : undefined,
+      // @ts-expect-error: return no point / no position next major.
+      column:
+        loc.start && loc.start.column !== undefined && loc.start.column > -1
+          ? loc.start.column + 1
+          : undefined,
+      offset:
+        startOffset !== undefined && startOffset > -1 ? startOffset : undefined
     },
     end: {
-      line: loc.end && loc.end.line > -1 ? loc.end.line : null,
-      column: loc.end && loc.end.column > -1 ? loc.end.column + 1 : null,
-      offset: endOffset > -1 ? endOffset : null
+      // @ts-expect-error: return no point / no position next major.
+      line:
+        loc.end && loc.end.line !== undefined && loc.end.line > -1
+          ? loc.end.line
+          : undefined,
+      // @ts-expect-error: return no point / no position next major.
+      column:
+        loc.end && loc.end.column !== undefined && loc.end.column > -1
+          ? loc.end.column + 1
+          : undefined,
+      offset: endOffset !== undefined && endOffset > -1 ? endOffset : undefined
     }
   }
 }

test.js

@@ -6,17 +6,17 @@ test('unist-util-position-from-estree', (t) => {
   t.deepEqual(
     positionFromEstree(),
     {
-      start: {line: null, column: null, offset: null},
-      end: {line: null, column: null, offset: null}
+      start: {line: undefined, column: undefined, offset: undefined},
+      end: {line: undefined, column: undefined, offset: undefined}
     },
     'should support a missing node'
   )
 
   t.deepEqual(
     positionFromEstree(parse('x', {ecmaVersion: 2020})),
     {
-      start: {line: null, column: null, offset: 0},
-      end: {line: null, column: null, offset: 1}
+      start: {line: undefined, column: undefined, offset: 0},
+      end: {line: undefined, column: undefined, offset: 1}
     },
     'should support node w/o `loc`s'
   )
@@ -33,8 +33,8 @@ test('unist-util-position-from-estree', (t) => {
   t.deepEqual(
     positionFromEstree(parse('x', {ecmaVersion: 2020, ranges: true})),
     {
-      start: {line: null, column: null, offset: 0},
-      end: {line: null, column: null, offset: 1}
+      start: {line: undefined, column: undefined, offset: 0},
+      end: {line: undefined, column: undefined, offset: 1}
     },
     'should support node w/ `range`s'
   )

tsconfig.json

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