Use ts-expect-error instead of ts-ignore. (#5869)

34 files changed, 81 insertions, 94 deletions

diff --git a/cli/js/error_stack.ts b/cli/js/error_stack.ts
index e77f0865c..8a3d0530b 100644
--- a/cli/js/error_stack.ts
+++ b/cli/js/error_stack.ts
@@ -244,19 +244,19 @@ function prepareStackTrace(
         }
       )
       .map((callSite): string => {
-        // @ts-ignore
+        // @ts-expect-error
         error.__callSiteEvals.push(Object.freeze(evaluateCallSite(callSite)));
         const isInternal =
           callSite.getFileName()?.startsWith("$deno$") ?? false;
         const string = callSiteToString(callSite, isInternal);
-        // @ts-ignore
+        // @ts-expect-error
         error.__formattedFrames.push(string);
         return `    at ${colors.stripColor(string)}`;
       })
       .join("\n");
-  // @ts-ignore
+  // @ts-expect-error
   Object.freeze(error.__callSiteEvals);
-  // @ts-ignore
+  // @ts-expect-error
   Object.freeze(error.__formattedFrames);
   return errorString;
 }
diff --git a/cli/js/repl.ts b/cli/js/repl.ts
index c84be68b1..79273ed33 100644
--- a/cli/js/repl.ts
+++ b/cli/js/repl.ts
@@ -35,7 +35,7 @@ function isRecoverableError(e: Error): boolean {
 // Returns `true` if `close()` is called in REPL.
 // We should quit the REPL when this function returns `true`.
 function isCloseCalled(): boolean {
-  // @ts-ignore
+  // @ts-expect-error
   return globalThis.closed;
 }
 
diff --git a/cli/js/runtime_main.ts b/cli/js/runtime_main.ts
index 3e81fc680..97205d205 100644
--- a/cli/js/runtime_main.ts
+++ b/cli/js/runtime_main.ts
@@ -30,7 +30,7 @@ import { log, immutableDefine } from "./util.ts";
 // TODO: factor out `Deno` global assignment to separate function
 // Add internal object to Deno object.
 // This is not exposed as part of the Deno types.
-// @ts-ignore
+// @ts-expect-error
 denoNs[internalSymbol] = internalObject;
 
 let windowIsClosing = false;
@@ -71,7 +71,7 @@ export function bootstrapMainRuntime(): void {
     throw new Error("Worker runtime already bootstrapped");
   }
   // Remove bootstrapping methods from global scope
-  // @ts-ignore
+  // @ts-expect-error
   globalThis.bootstrap = undefined;
   log("bootstrapMainRuntime");
   hasBootstrapped = true;
diff --git a/cli/js/runtime_worker.ts b/cli/js/runtime_worker.ts
index ed735fd52..4e92663a1 100644
--- a/cli/js/runtime_worker.ts
+++ b/cli/js/runtime_worker.ts
@@ -33,7 +33,7 @@ import { setSignals } from "./signals.ts";
 // TODO: factor out `Deno` global assignment to separate function
 // Add internal object to Deno object.
 // This is not exposed as part of the Deno types.
-// @ts-ignore
+// @ts-expect-error
 denoNs[internalSymbol] = internalObject;
 
 const encoder = new TextEncoder();
@@ -128,7 +128,7 @@ export function bootstrapWorkerRuntime(
     throw new Error("Worker runtime already bootstrapped");
   }
   // Remove bootstrapping methods from global scope
-  // @ts-ignore
+  // @ts-expect-error
   globalThis.bootstrap = undefined;
   log("bootstrapWorkerRuntime");
   hasBootstrapped = true;
diff --git a/cli/js/testing.ts b/cli/js/testing.ts
index 09acdc23d..fc32fd604 100644
--- a/cli/js/testing.ts
+++ b/cli/js/testing.ts
@@ -333,11 +333,10 @@ async function runTests({
   const filterFn = createFilterFn(filter, skip);
   const testApi = new TestApi(TEST_REGISTRY, filterFn, failFast);
 
-  // @ts-ignore
   const originalConsole = globalThis.console;
 
   if (disableLog) {
-    // @ts-ignore
+    // @ts-expect-error
     globalThis.console = disabledConsole;
   }
 
@@ -356,7 +355,6 @@ async function runTests({
   }
 
   if (disableLog) {
-    // @ts-ignore
     globalThis.console = originalConsole;
   }
 
diff --git a/cli/js/web/body.ts b/cli/js/web/body.ts
index 9c4997755..ffe3f0e59 100644
--- a/cli/js/web/body.ts
+++ b/cli/js/web/body.ts
@@ -100,7 +100,6 @@ export class Body implements domTypes.Body {
     }
 
     if (this._bodySource instanceof ReadableStreamImpl) {
-      // @ts-ignore
       this._stream = this._bodySource;
     }
     if (typeof this._bodySource === "string") {
@@ -290,7 +289,6 @@ export class Body implements domTypes.Body {
         enc.encode(this._bodySource).buffer as ArrayBuffer
       );
     } else if (this._bodySource instanceof ReadableStreamImpl) {
-      // @ts-ignore
       return bufferFromStream(this._bodySource.getReader());
     } else if (this._bodySource instanceof FormData) {
       const enc = new TextEncoder();
diff --git a/cli/js/web/console.ts b/cli/js/web/console.ts
index 7a3f9241e..69c9d3137 100644
--- a/cli/js/web/console.ts
+++ b/cli/js/web/console.ts
@@ -223,7 +223,7 @@ function groupEntries<T>(
     let order = "padStart";
     if (value !== undefined) {
       for (let i = 0; i < entries.length; i++) {
-        //@ts-ignore
+        //@ts-expect-error
         if (typeof value[i] !== "number" && typeof value[i] !== "bigint") {
           order = "padEnd";
           break;
@@ -239,7 +239,7 @@ function groupEntries<T>(
       for (; j < max - 1; j++) {
         // In future, colors should be taken here into the account
         const padding = maxLineLength[j - i];
-        //@ts-ignore
+        //@ts-expect-error
         str += `${entries[j]}, `[order](padding, " ");
       }
       if (order === "padStart") {
@@ -412,7 +412,7 @@ function createMapString(
     },
     group: false,
   };
-  //@ts-ignore
+  //@ts-expect-error
   return createIterableString(value, ctx, level, maxLevel, printConfig);
 }
 
@@ -494,7 +494,7 @@ function createRawObjectString(
   let baseString = "";
 
   let shouldShowDisplayName = false;
-  // @ts-ignore
+  // @ts-expect-error
   let displayName = value[Symbol.toStringTag];
   if (!displayName) {
     displayName = getClassInstanceName(value);
@@ -515,7 +515,7 @@ function createRawObjectString(
   for (const key of symbolKeys) {
     entries.push(
       `${key.toString()}: ${stringifyWithQuotes(
-        // @ts-ignore
+        // @ts-expect-error
         value[key],
         ctx,
         level + 1,
@@ -949,7 +949,7 @@ export class Console {
       name: "Trace",
       message,
     };
-    // @ts-ignore
+    // @ts-expect-error
     Error.captureStackTrace(err, this.trace);
     this.error((err as Error).stack);
   };
diff --git a/cli/js/web/fetch.ts b/cli/js/web/fetch.ts
index ec75d67cb..a56ebe772 100644
--- a/cli/js/web/fetch.ts
+++ b/cli/js/web/fetch.ts
@@ -282,7 +282,7 @@ export async function fetch(
     method = input.method;
     headers = input.headers;
 
-    //@ts-ignore
+    //@ts-expect-error
     if (input._bodySource) {
       body = new DataView(await input.arrayBuffer());
     }
diff --git a/cli/js/web/timers.ts b/cli/js/web/timers.ts
index 90b6bba94..87b23de06 100644
--- a/cli/js/web/timers.ts
+++ b/cli/js/web/timers.ts
@@ -239,7 +239,7 @@ export function setTimeout(
   ...args: Args
 ): number {
   checkBigInt(delay);
-  // @ts-ignore
+  // @ts-expect-error
   checkThis(this);
   return setTimer(cb, delay, args, false);
 }
@@ -250,7 +250,7 @@ export function setInterval(
   ...args: Args
 ): number {
   checkBigInt(delay);
-  // @ts-ignore
+  // @ts-expect-error
   checkThis(this);
   return setTimer(cb, delay, args, true);
 }
diff --git a/cli/tests/042_dyn_import_evalcontext.ts b/cli/tests/042_dyn_import_evalcontext.ts
index 124a406d2..e1cc485d1 100644
--- a/cli/tests/042_dyn_import_evalcontext.ts
+++ b/cli/tests/042_dyn_import_evalcontext.ts
@@ -1,4 +1,4 @@
-// @ts-ignore
+// @ts-expect-error
 Deno.core.evalContext(
   "(async () => console.log(await import('./subdir/mod4.js')))()"
 );
diff --git a/cli/tests/unit/body_test.ts b/cli/tests/unit/body_test.ts
index c8f783e04..fd91b5ced 100644
--- a/cli/tests/unit/body_test.ts
+++ b/cli/tests/unit/body_test.ts
@@ -42,7 +42,7 @@ unitTest(
 
     const body = buildBody(text);
 
-    // @ts-ignore
+    // @ts-expect-error
     body.contentType = "multipart/form-data;boundary=boundary";
 
     const formData = await body.formData();
@@ -62,7 +62,7 @@ unitTest(
 
     const body = buildBody(text);
 
-    // @ts-ignore
+    // @ts-expect-error
     body.contentType = "application/x-www-form-urlencoded";
 
     const formData = await body.formData();
diff --git a/cli/tests/unit/console_test.ts b/cli/tests/unit/console_test.ts
index 02d71e4ca..35985dc1c 100644
--- a/cli/tests/unit/console_test.ts
+++ b/cli/tests/unit/console_test.ts
@@ -22,7 +22,7 @@ const customInspect = Deno.customInspect;
 const {
   Console,
   stringifyArgs,
-  // @ts-ignore TypeScript (as of 3.7) does not support indexing namespaces by symbol
+  // @ts-expect-error TypeScript (as of 3.7) does not support indexing namespaces by symbol
 } = Deno[Deno.internal];
 
 function stringify(...args: unknown[]): string {
@@ -590,7 +590,7 @@ unitTest(function consoleTestStringifyIterable() {
   0,                <120 empty items>
 ]`
   );
-*/
+  */
 });
 
 unitTest(async function consoleTestStringifyPromises(): Promise<void> {
@@ -727,7 +727,6 @@ unitTest(function consoleTestCallToStringOnLabel(): void {
   mockConsole((console) => {
     for (const method of methods) {
       let hasCalled = false;
-      // @ts-ignore
       console[method]({
         toString(): void {
           hasCalled = true;
diff --git a/cli/tests/unit/dispatch_json_test.ts b/cli/tests/unit/dispatch_json_test.ts
index 4e95b86a2..51c33befd 100644
--- a/cli/tests/unit/dispatch_json_test.ts
+++ b/cli/tests/unit/dispatch_json_test.ts
@@ -20,9 +20,9 @@ unitTest(
 );
 
 unitTest(function malformedJsonControlBuffer(): void {
-  // @ts-ignore
+  // @ts-expect-error
   const opId = Deno.core.ops()["op_open"];
-  // @ts-ignore
+  // @ts-expect-error
   const res = Deno.core.send(opId, new Uint8Array([1, 2, 3, 4, 5]));
   const resText = new TextDecoder().decode(res);
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
diff --git a/cli/tests/unit/dispatch_minimal_test.ts b/cli/tests/unit/dispatch_minimal_test.ts
index afc17f4fb..1c7ba11f0 100644
--- a/cli/tests/unit/dispatch_minimal_test.ts
+++ b/cli/tests/unit/dispatch_minimal_test.ts
@@ -26,9 +26,9 @@ unitTest(async function sendAsyncStackTrace(): Promise<void> {
 });
 
 unitTest(function malformedMinimalControlBuffer(): void {
-  // @ts-ignore
+  // @ts-expect-error
   const readOpId = Deno.core.ops()["op_read"];
-  // @ts-ignore
+  // @ts-expect-error
   const res = Deno.core.send(readOpId, new Uint8Array([1, 2, 3, 4, 5]));
   const header = res.slice(0, 12);
   const buf32 = new Int32Array(
diff --git a/cli/tests/unit/dom_iterable_test.ts b/cli/tests/unit/dom_iterable_test.ts
index b9435b3bc..c4e535a25 100644
--- a/cli/tests/unit/dom_iterable_test.ts
+++ b/cli/tests/unit/dom_iterable_test.ts
@@ -20,7 +20,7 @@ function setup() {
     Base,
     // This is using an internal API we don't want published as types, so having
     // to cast to any to "trick" TypeScript
-    // @ts-ignore TypeScript (as of 3.7) does not support indexing namespaces by symbol
+    // @ts-expect-error TypeScript (as of 3.7) does not support indexing namespaces by symbol
     DomIterable: Deno[Deno.internal].DomIterableMixin(Base, dataSymbol),
   };
 }
diff --git a/cli/tests/unit/error_stack_test.ts b/cli/tests/unit/error_stack_test.ts
index e5cedfcf5..eb0a5c0e6 100644
--- a/cli/tests/unit/error_stack_test.ts
+++ b/cli/tests/unit/error_stack_test.ts
@@ -1,7 +1,7 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 import { unitTest, assert } from "./test_util.ts";
 
-// @ts-ignore TypeScript (as of 3.7) does not support indexing namespaces by symbol
+// @ts-expect-error TypeScript (as of 3.7) does not support indexing namespaces by symbol
 const { setPrepareStackTrace } = Deno[Deno.internal];
 
 interface CallSite {
diff --git a/cli/tests/unit/event_target_test.ts b/cli/tests/unit/event_target_test.ts
index 0c4eb4d0d..cfbe5285b 100644
--- a/cli/tests/unit/event_target_test.ts
+++ b/cli/tests/unit/event_target_test.ts
@@ -4,11 +4,8 @@ import { unitTest, assertEquals } from "./test_util.ts";
 unitTest(function addEventListenerTest(): void {
   const document = new EventTarget();
 
-  // @ts-ignore tests ignoring the type system for resilience
   assertEquals(document.addEventListener("x", null, false), undefined);
-  // @ts-ignore
   assertEquals(document.addEventListener("x", null, true), undefined);
-  // @ts-ignore
   assertEquals(document.addEventListener("x", null), undefined);
 });
 
@@ -71,11 +68,8 @@ unitTest(function anEventTargetCanBeSubclassed(): void {
 
 unitTest(function removingNullEventListenerShouldSucceed(): void {
   const document = new EventTarget();
-  // @ts-ignore
   assertEquals(document.removeEventListener("x", null, false), undefined);
-  // @ts-ignore
   assertEquals(document.removeEventListener("x", null, true), undefined);
-  // @ts-ignore
   assertEquals(document.removeEventListener("x", null), undefined);
 });
 
diff --git a/cli/tests/unit/fetch_test.ts b/cli/tests/unit/fetch_test.ts
index ed17c869a..97b001b55 100644
--- a/cli/tests/unit/fetch_test.ts
+++ b/cli/tests/unit/fetch_test.ts
@@ -93,7 +93,7 @@ unitTest({ perms: { net: true } }, async function fetchBodyUsed(): Promise<
   assertEquals(response.bodyUsed, false);
   assertThrows((): void => {
     // Assigning to read-only property throws in the strict mode.
-    // @ts-ignore
+    // @ts-expect-error
     response.bodyUsed = true;
   });
   await response.blob();
@@ -595,7 +595,7 @@ unitTest({ perms: { net: true } }, async function fetchBodyReadTwice(): Promise<
   const methods = ["json", "text", "formData", "arrayBuffer"];
   for (const method of methods) {
     try {
-      // @ts-ignore
+      // @ts-expect-error
       await response[method]();
       fail(
         "Reading body multiple times should failed, the stream should've been locked."
diff --git a/cli/tests/unit/files_test.ts b/cli/tests/unit/files_test.ts
index a035c7074..9ab74be89 100644
--- a/cli/tests/unit/files_test.ts
+++ b/cli/tests/unit/files_test.ts
@@ -290,7 +290,7 @@ unitTest(
     // writing null should throw an error
     let err;
     try {
-      // @ts-ignore
+      // @ts-expect-error
       await file.write(null);
     } catch (e) {
       err = e;
@@ -322,7 +322,7 @@ unitTest(
     // reading file into null buffer should throw an error
     let err;
     try {
-      // @ts-ignore
+      // @ts-expect-error
       await file.read(null);
     } catch (e) {
       err = e;
diff --git a/cli/tests/unit/form_data_test.ts b/cli/tests/unit/form_data_test.ts
index 10cbd30a7..5344d8512 100644
--- a/cli/tests/unit/form_data_test.ts
+++ b/cli/tests/unit/form_data_test.ts
@@ -41,9 +41,9 @@ unitTest(function formDataParamsGetSuccess(): void {
   formData.append("a", "true");
   formData.append("b", "false");
   formData.append("a", "null");
-  // @ts-ignore
+  // @ts-expect-error
   formData.append("d", undefined);
-  // @ts-ignore
+  // @ts-expect-error
   formData.append("e", null);
   assertEquals(formData.get("a"), "true");
   assertEquals(formData.get("b"), "false");
@@ -70,10 +70,10 @@ unitTest(function formDataParamsSetSuccess(): void {
   assertEquals(formData.getAll("b"), ["false"]);
   formData.set("a", "false");
   assertEquals(formData.getAll("a"), ["false"]);
-  // @ts-ignore
+  // @ts-expect-error
   formData.set("d", undefined);
   assertEquals(formData.get("d"), "undefined");
-  // @ts-ignore
+  // @ts-expect-error
   formData.set("e", null);
   assertEquals(formData.get("e"), "null");
 });
@@ -134,7 +134,7 @@ unitTest(function formDataParamsArgumentsCheck(): void {
     let hasThrown = 0;
     let errMsg = "";
     try {
-      // @ts-ignore
+      // @ts-expect-error
       formData[method]();
       hasThrown = 1;
     } catch (err) {
@@ -158,7 +158,7 @@ unitTest(function formDataParamsArgumentsCheck(): void {
     let errMsg = "";
 
     try {
-      // @ts-ignore
+      // @ts-expect-error
       formData[method]();
       hasThrown = 1;
     } catch (err) {
@@ -178,7 +178,7 @@ unitTest(function formDataParamsArgumentsCheck(): void {
     hasThrown = 0;
     errMsg = "";
     try {
-      // @ts-ignore
+      // @ts-expect-error
       formData[method]("foo");
       hasThrown = 1;
     } catch (err) {
diff --git a/cli/tests/unit/globals_test.ts b/cli/tests/unit/globals_test.ts
index aa8b4f46e..bb5e5c604 100644
--- a/cli/tests/unit/globals_test.ts
+++ b/cli/tests/unit/globals_test.ts
@@ -48,12 +48,12 @@ unitTest(function webAssemblyExists(): void {
 unitTest(function DenoNamespaceImmutable(): void {
   const denoCopy = window.Deno;
   try {
-    // @ts-ignore
+    // @ts-expect-error
     Deno = 1;
   } catch {}
   assert(denoCopy === Deno);
   try {
-    // @ts-ignore
+    // @ts-expect-error
     window.Deno = 1;
   } catch {}
   assert(denoCopy === Deno);
@@ -64,7 +64,7 @@ unitTest(function DenoNamespaceImmutable(): void {
 
   const { readFile } = Deno;
   try {
-    // @ts-ignore
+    // @ts-expect-error
     Deno.readFile = 1;
   } catch {}
   assert(readFile === Deno.readFile);
@@ -73,19 +73,19 @@ unitTest(function DenoNamespaceImmutable(): void {
   } catch {}
   assert(readFile === Deno.readFile);
 
-  // @ts-ignore
+  // @ts-expect-error
   const { print } = Deno.core;
   try {
-    // @ts-ignore
+    // @ts-expect-error
     Deno.core.print = 1;
   } catch {}
-  // @ts-ignore
+  // @ts-expect-error
   assert(print === Deno.core.print);
   try {
-    // @ts-ignore
+    // @ts-expect-error
     delete Deno.core.print;
   } catch {}
-  // @ts-ignore
+  // @ts-expect-error
   assert(print === Deno.core.print);
 });
 
diff --git a/cli/tests/unit/headers_test.ts b/cli/tests/unit/headers_test.ts
index aaa829837..6dd60c8c5 100644
--- a/cli/tests/unit/headers_test.ts
+++ b/cli/tests/unit/headers_test.ts
@@ -7,7 +7,7 @@ import {
 } from "./test_util.ts";
 const {
   stringifyArgs,
-  // @ts-ignore TypeScript (as of 3.7) does not support indexing namespaces by symbol
+  // @ts-expect-error TypeScript (as of 3.7) does not support indexing namespaces by symbol
 } = Deno[Deno.internal];
 
 // Logic heavily copied from web-platform-tests, make
@@ -18,7 +18,7 @@ unitTest(function newHeaderTest(): void {
   new Headers(undefined);
   new Headers({});
   try {
-    // @ts-ignore
+    // @ts-expect-error
     new Headers(null);
   } catch (e) {
     assertEquals(
@@ -32,7 +32,7 @@ const headerDict: Record<string, string> = {
   name1: "value1",
   name2: "value2",
   name3: "value3",
-  // @ts-ignore
+  // @ts-expect-error
   name4: undefined,
   "Content-Type": "value4",
 };
@@ -269,7 +269,7 @@ unitTest(function headerParamsArgumentsCheck(): void {
     let hasThrown = 0;
     let errMsg = "";
     try {
-      // @ts-ignore
+      // @ts-expect-error
       headers[method]();
       hasThrown = 1;
     } catch (err) {
@@ -293,7 +293,7 @@ unitTest(function headerParamsArgumentsCheck(): void {
     let errMsg = "";
 
     try {
-      // @ts-ignore
+      // @ts-expect-error
       headers[method]();
       hasThrown = 1;
     } catch (err) {
@@ -313,7 +313,7 @@ unitTest(function headerParamsArgumentsCheck(): void {
     hasThrown = 0;
     errMsg = "";
     try {
-      // @ts-ignore
+      // @ts-expect-error
       headers[method]("foo");
       hasThrown = 1;
     } catch (err) {
diff --git a/cli/tests/unit/internals_test.ts b/cli/tests/unit/internals_test.ts
index abd4c94c3..3f4bdae79 100644
--- a/cli/tests/unit/internals_test.ts
+++ b/cli/tests/unit/internals_test.ts
@@ -4,7 +4,7 @@ import { unitTest, assert } from "./test_util.ts";
 unitTest(function internalsExists(): void {
   const {
     stringifyArgs,
-    // @ts-ignore TypeScript (as of 3.7) does not support indexing namespaces by symbol
+    // @ts-expect-error TypeScript (as of 3.7) does not support indexing namespaces by symbol
   } = Deno[Deno.internal];
   assert(!!stringifyArgs);
 });
diff --git a/cli/tests/unit/request_test.ts b/cli/tests/unit/request_test.ts
index 8a276c5e7..be6e956b7 100644
--- a/cli/tests/unit/request_test.ts
+++ b/cli/tests/unit/request_test.ts
@@ -10,7 +10,7 @@ unitTest(function fromInit(): void {
     },
   });
 
-  // @ts-ignore
+  // @ts-expect-error
   assertEquals("ahoyhoy", req._bodySource);
   assertEquals(req.url, "https://example.com");
   assertEquals(req.headers.get("test-header"), "value");
@@ -18,13 +18,13 @@ unitTest(function fromInit(): void {
 
 unitTest(function fromRequest(): void {
   const r = new Request("https://example.com");
-  // @ts-ignore
+  // @ts-expect-error
   r._bodySource = "ahoyhoy";
   r.headers.set("test-header", "value");
 
   const req = new Request(r);
 
-  // @ts-ignore
+  // @ts-expect-error
   assertEquals(req._bodySource, r._bodySource);
   assertEquals(req.url, r.url);
   assertEquals(req.headers.get("test-header"), r.headers.get("test-header"));
@@ -44,6 +44,6 @@ unitTest(async function cloneRequestBodyStream(): Promise<void> {
 
   assertEquals(b1, b2);
 
-  // @ts-ignore
+  // @ts-expect-error
   assert(r1._bodySource !== r2._bodySource);
 });
diff --git a/cli/tests/unit/streams_internal_test.ts b/cli/tests/unit/streams_internal_test.ts
index f324da194..f49c9f494 100644
--- a/cli/tests/unit/streams_internal_test.ts
+++ b/cli/tests/unit/streams_internal_test.ts
@@ -8,7 +8,7 @@ unitTest(function streamReadableHwmError() {
       () => {
         new ReadableStream<number>(
           undefined,
-          // @ts-ignore
+          // @ts-expect-error
           { highWaterMark }
         );
       },
@@ -20,7 +20,7 @@ unitTest(function streamReadableHwmError() {
   assertThrows(() => {
     new ReadableStream<number>(
       undefined,
-      // @ts-ignore
+      // @ts-expect-error
       { highWaterMark: Symbol("hwk") }
     );
   }, TypeError);
@@ -33,7 +33,7 @@ unitTest(function streamWriteableHwmError() {
       () => {
         new WritableStream(
           undefined,
-          // @ts-ignore
+          // @ts-expect-error
           new CountQueuingStrategy({ highWaterMark })
         );
       },
@@ -45,7 +45,7 @@ unitTest(function streamWriteableHwmError() {
   assertThrows(() => {
     new WritableStream(
       undefined,
-      // @ts-ignore
+      // @ts-expect-error
       new CountQueuingStrategy({ highWaterMark: Symbol("hwmk") })
     );
   }, TypeError);
@@ -59,7 +59,7 @@ unitTest(function streamTransformHwmError() {
         new TransformStream(
           undefined,
           undefined,
-          // @ts-ignore
+          // @ts-expect-error
           { highWaterMark }
         );
       },
@@ -72,7 +72,7 @@ unitTest(function streamTransformHwmError() {
     new TransformStream(
       undefined,
       undefined,
-      // @ts-ignore
+      // @ts-expect-error
       { highWaterMark: Symbol("hwmk") }
     );
   }, TypeError);
diff --git a/cli/tests/unit/unit_test_runner.ts b/cli/tests/unit/unit_test_runner.ts
index 715dda500..e3df358d7 100755
--- a/cli/tests/unit/unit_test_runner.ts
+++ b/cli/tests/unit/unit_test_runner.ts
@@ -11,7 +11,7 @@ import {
   reportToConn,
 } from "./test_util.ts";
 
-// @ts-ignore
+// @ts-expect-error
 const internalObj = Deno[Deno.internal];
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 const reportToConsole = internalObj.reportToConsole as (message: any) => void;
diff --git a/cli/tests/unit/url_search_params_test.ts b/cli/tests/unit/url_search_params_test.ts
index 7b7dbab76..ce55a7520 100644
--- a/cli/tests/unit/url_search_params_test.ts
+++ b/cli/tests/unit/url_search_params_test.ts
@@ -177,7 +177,7 @@ unitTest(function urlSearchParamsAppendArgumentsCheck(): void {
       const searchParams = new URLSearchParams();
       let hasThrown = 0;
       try {
-        // @ts-ignore
+        // @ts-expect-error
         searchParams[method]();
         hasThrown = 1;
       } catch (err) {
@@ -194,7 +194,7 @@ unitTest(function urlSearchParamsAppendArgumentsCheck(): void {
     const searchParams = new URLSearchParams();
     let hasThrown = 0;
     try {
-      // @ts-ignore
+      // @ts-expect-error
       searchParams[method]("foo");
       hasThrown = 1;
     } catch (err) {
@@ -235,7 +235,7 @@ unitTest(function urlSearchParamsCustomSymbolIterator(): void {
 unitTest(
   function urlSearchParamsCustomSymbolIteratorWithNonStringParams(): void {
     const params = {};
-    // @ts-ignore
+    // @ts-expect-error
     params[Symbol.iterator] = function* (): IterableIterator<[number, number]> {
       yield [1, 2];
     };
diff --git a/std/http/server_test.ts b/std/http/server_test.ts
index 0560f7f8d..0423b8726 100644
--- a/std/http/server_test.ts
+++ b/std/http/server_test.ts
@@ -496,7 +496,6 @@ test({
   async fn(): Promise<void> {
     const serverRoutine = async (): Promise<void> => {
       const server = serve(":8124");
-      // @ts-ignore
       for await (const req of server) {
         await assertThrowsAsync(async () => {
           await req.respond({
diff --git a/std/mime/multipart_test.ts b/std/mime/multipart_test.ts
index 61afdba03..b7c0cb969 100644
--- a/std/mime/multipart_test.ts
+++ b/std/mime/multipart_test.ts
@@ -145,7 +145,7 @@ test("multipartMultipartWriter3", async function (): Promise<void> {
   );
   await assertThrowsAsync(
     async (): Promise<void> => {
-      // @ts-ignore
+      // @ts-expect-error
       await mw.writeFile("bar", "file", null);
     },
     Error,
diff --git a/std/node/global.ts b/std/node/global.ts
index c877d1d53..7d147cc4b 100644
--- a/std/node/global.ts
+++ b/std/node/global.ts
@@ -5,5 +5,5 @@ Object.defineProperty(globalThis, Symbol.toStringTag, {
   configurable: true,
 });
 
-// @ts-ignore
+// @ts-expect-error
 globalThis["global"] = globalThis;
diff --git a/std/node/module.ts b/std/node/module.ts
index 4e0c55c1d..71c25beac 100644
--- a/std/node/module.ts
+++ b/std/node/module.ts
@@ -263,9 +263,9 @@ class Module {
         message = message + "\nRequire stack:\n- " + requireStack.join("\n- ");
       }
       const err = new Error(message);
-      // @ts-ignore
+      // @ts-expect-error
       err.code = "MODULE_NOT_FOUND";
-      // @ts-ignore
+      // @ts-expect-error
       err.requireStack = requireStack;
       throw err;
     }
@@ -737,7 +737,7 @@ function tryPackage(
         `Cannot find module '${filename}'. ` +
           'Please verify that the package.json has a valid "main" entry'
       );
-      // @ts-ignore
+      // @ts-expect-error
       err.code = "MODULE_NOT_FOUND";
       throw err;
     }
@@ -882,7 +882,7 @@ function applyExports(basePath: string, expansion: string): string {
     `Package exports for '${basePath}' do not define ` +
       `a '${mappingKey}' subpath`
   );
-  // @ts-ignore
+  // @ts-expect-error
   e.code = "MODULE_NOT_FOUND";
   throw e;
 }
@@ -982,7 +982,7 @@ function resolveExportsTarget(
   } else {
     e = new Error(`No valid exports main found for '${basePath}'`);
   }
-  // @ts-ignore
+  // @ts-expect-error
   e.code = "MODULE_NOT_FOUND";
   throw e;
 }
@@ -1007,7 +1007,7 @@ const CircularRequirePrototypeWarningProxy = new Proxy(
   {
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
     get(target, prop): any {
-      // @ts-ignore
+      // @ts-expect-error
       if (prop in target) return target[prop];
       emitCircularRequireWarning(prop);
       return undefined;
@@ -1058,7 +1058,7 @@ type RequireWrapper = (
 function wrapSafe(filename: string, content: string): RequireWrapper {
   // TODO: fix this
   const wrapper = Module.wrap(content);
-  // @ts-ignore
+  // @ts-expect-error
   const [f, err] = Deno.core.evalContext(wrapper, filename);
   if (err) {
     throw err;
diff --git a/std/signal/test.ts b/std/signal/test.ts
index 15ebbdcc7..13c2998db 100644
--- a/std/signal/test.ts
+++ b/std/signal/test.ts
@@ -9,7 +9,7 @@ test({
   fn() {
     assertThrows(
       () => {
-        // @ts-ignore
+        // @ts-expect-error
         signal();
       },
       Error,
diff --git a/std/uuid/tests/isNil.ts b/std/uuid/tests/isNil.ts
index 4514576da..1f0db416e 100644
--- a/std/uuid/tests/isNil.ts
+++ b/std/uuid/tests/isNil.ts
@@ -1,7 +1,6 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 import { assert } from "../../testing/asserts.ts";
 const { test } = Deno;
-// @ts-ignore
 import { NIL_UUID, isNil } from "../mod.ts";
 
 test({
diff --git a/std/ws/mod.ts b/std/ws/mod.ts
index 324588af0..97c77baab 100644
--- a/std/ws/mod.ts
+++ b/std/ws/mod.ts
@@ -491,7 +491,7 @@ export async function handshake(
     throw new Error("ws: invalid status line: " + statusLine);
   }
 
-  // @ts-ignore
+  // @ts-expect-error
   const { version, statusCode } = m.groups;
   if (version !== "HTTP/1.1" || statusCode !== "101") {
     throw new Error(