diff --git a/js/package-lock.json b/js/package-lock.json
index 0fca515b61238..23557a9bba9ff 100644
--- a/js/package-lock.json
+++ b/js/package-lock.json
@@ -17,6 +17,7 @@
         "@types/npmlog": "^4.1.4",
         "@typescript-eslint/eslint-plugin": "^8.46.2",
         "@typescript-eslint/parser": "^8.46.2",
+        "baseline-browser-mapping": "^2.9.13",
         "dir-compare": "^4.2.0",
         "esbuild": "^0.25.0",
         "esbuild-plugin-polyfill-node": "^0.3.0",
@@ -1624,9 +1625,9 @@
       ]
     },
     "node_modules/baseline-browser-mapping": {
-      "version": "2.8.20",
-      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.8.20.tgz",
-      "integrity": "sha512-JMWsdF+O8Orq3EMukbUN1QfbLK9mX2CkUmQBcW2T0s8OmdAUL5LLM/6wFwSrqXzlXB13yhyK9gTKS1rIizOduQ==",
+      "version": "2.9.13",
+      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.9.13.tgz",
+      "integrity": "sha512-WhtvB2NG2wjr04+h77sg3klAIwrgOqnjS49GGudnUPGFFgg7G17y7Qecqp+2Dr5kUDxNRBca0SK7cG8JwzkWDQ==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
@@ -6969,9 +6970,9 @@
       "dev": true
     },
     "baseline-browser-mapping": {
-      "version": "2.8.20",
-      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.8.20.tgz",
-      "integrity": "sha512-JMWsdF+O8Orq3EMukbUN1QfbLK9mX2CkUmQBcW2T0s8OmdAUL5LLM/6wFwSrqXzlXB13yhyK9gTKS1rIizOduQ==",
+      "version": "2.9.13",
+      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.9.13.tgz",
+      "integrity": "sha512-WhtvB2NG2wjr04+h77sg3klAIwrgOqnjS49GGudnUPGFFgg7G17y7Qecqp+2Dr5kUDxNRBca0SK7cG8JwzkWDQ==",
       "dev": true
     },
     "binary-extensions": {
diff --git a/js/package.json b/js/package.json
index cb8b09f4247a6..18cd765dff85a 100644
--- a/js/package.json
+++ b/js/package.json
@@ -10,6 +10,7 @@
     "@types/npmlog": "^4.1.4",
     "@typescript-eslint/eslint-plugin": "^8.46.2",
     "@typescript-eslint/parser": "^8.46.2",
+    "baseline-browser-mapping": "^2.9.13",
     "dir-compare": "^4.2.0",
     "esbuild": "^0.25.0",
     "esbuild-plugin-polyfill-node": "^0.3.0",
diff --git a/js/web/lib/wasm/jsep/backend-webgpu.ts b/js/web/lib/wasm/jsep/backend-webgpu.ts
index e486e4b0e043d..5acf129a73cee 100644
--- a/js/web/lib/wasm/jsep/backend-webgpu.ts
+++ b/js/web/lib/wasm/jsep/backend-webgpu.ts
@@ -263,6 +263,7 @@ export class WebGpuBackend {
     this.kernelCustomData = new Map();
 
     // set up flags for logger
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
     configureLogger(env.logLevel!, !!env.debug);
 
     // TODO: set up flags
@@ -341,9 +342,11 @@ export class WebGpuBackend {
     let queryReadBuffer: GPUBuffer;
     if (this.queryType !== 'none') {
       this.commandEncoder.resolveQuerySet(
+        // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
         this.querySet!,
         0,
         this.pendingDispatchNumber * 2,
+        // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
         this.queryResolveBuffer!,
         0,
       );
@@ -356,6 +359,7 @@ export class WebGpuBackend {
       this.pendingQueries.set(queryReadBuffer, this.pendingKernels);
       this.pendingKernels = [];
       this.commandEncoder.copyBufferToBuffer(
+        // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
         this.queryResolveBuffer!,
         0,
         queryReadBuffer,
@@ -827,7 +831,7 @@ export class WebGpuBackend {
       return;
     }
 
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any, @typescript-eslint/no-unnecessary-type-assertion
     (this.computePassEncoder as any).writeTimestamp(this.querySet, index);
   }
   setQueryType(): void {
diff --git a/js/web/lib/wasm/jsep/backend-webnn.ts b/js/web/lib/wasm/jsep/backend-webnn.ts
index 0bb1b09687018..43c0f54fc0f94 100644
--- a/js/web/lib/wasm/jsep/backend-webnn.ts
+++ b/js/web/lib/wasm/jsep/backend-webnn.ts
@@ -103,6 +103,7 @@ export class WebNNBackend {
   private mlOpSupportLimitsBySessionId = new Map<number, MLOpSupportLimits>();
 
   constructor(env: Env) {
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
     configureLogger(env.logLevel!, !!env.debug);
   }
 
diff --git a/js/web/lib/wasm/jsep/init.ts b/js/web/lib/wasm/jsep/init.ts
index 50fb26fef1d41..cf30408798781 100644
--- a/js/web/lib/wasm/jsep/init.ts
+++ b/js/web/lib/wasm/jsep/init.ts
@@ -200,6 +200,7 @@ export const init = async (
     // eslint-disable-next-line @typescript-eslint/no-require-imports, @typescript-eslint/no-var-requires
     const webGpuBackendImpl = require('./backend-webgpu').WebGpuBackend;
     const backend = new webGpuBackendImpl();
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
     await backend.initialize(env, gpuAdapter!);
 
     jsepInit('webgpu', [
diff --git a/js/web/lib/wasm/proxy-worker/main.ts b/js/web/lib/wasm/proxy-worker/main.ts
index 163bac4eb676d..182758d0bc3e3 100644
--- a/js/web/lib/wasm/proxy-worker/main.ts
+++ b/js/web/lib/wasm/proxy-worker/main.ts
@@ -109,6 +109,7 @@ if (isProxyWorker) {
         case 'init-wasm':
           initializeWebAssembly(message!.wasm).then(
             () => {
+              // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
               initRuntime(message!).then(
                 () => {
                   postMessage({ type });
diff --git a/js/web/lib/wasm/run-options.ts b/js/web/lib/wasm/run-options.ts
index a0ef57df31129..a910ef9e0ccf3 100644
--- a/js/web/lib/wasm/run-options.ts
+++ b/js/web/lib/wasm/run-options.ts
@@ -41,7 +41,9 @@ export const setRunOptions = (options: InferenceSession.RunOptions): [number, nu
     }
 
     runOptionsHandle = wasm._OrtCreateRunOptions(
+      // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
       runOptions.logSeverityLevel!,
+      // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
       runOptions.logVerbosityLevel!,
       !!runOptions.terminate!,
       tagDataOffset,
diff --git a/js/web/lib/wasm/wasm-core-impl.ts b/js/web/lib/wasm/wasm-core-impl.ts
index 18c536d8d9217..61a7e12fd781c 100644
--- a/js/web/lib/wasm/wasm-core-impl.ts
+++ b/js/web/lib/wasm/wasm-core-impl.ts
@@ -92,6 +92,7 @@ const initOrt = (numThreads: number, loggingLevel: number): void => {
  */
 export const initRuntime = async (env: Env): Promise<void> => {
   // init ORT
+  // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
   initOrt(env.wasm.numThreads!, logLevelStringToEnum(env.logLevel));
 };
 
@@ -955,6 +956,7 @@ export const run = async (
                   gpuBuffer,
                   download: async () => {
                     const arrayBuffer = await downloadDataFunction();
+                    // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
                     const data = new (tensorTypeToTypedArrayConstructor(type!))(arrayBuffer);
                     return data as Tensor.DataTypeMap[Tensor.GpuBufferDataTypes];
                   },