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Fix @onclick:preventDefault not working with enhanced navigation #64917

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Fix @onclick:preventDefault not working with enhanced navigation

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Fix @onclick:preventDefault not working with enhanced navigation #64917

Fix @onclick:preventDefault not working with enhanced navigation
dc7a1c6
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Build Analysis / Build Analysis failed Jan 7, 2026 in 0s

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Build Failures

aspnetcore-components-e2e / Test: Blazor E2E tests on Linux / Run E2E tests

[ 🚧 Report infrastructure issue] [ 📄 Report repository issue]
    ❌Bash exited with code '1'.

Test Failures (15 tests failed)

🔹 [All failing tests from aspnetcore-ci]

    ⚠️ 4 failing tests not displayed for this pipeline due to space limitations

    ❌ Microsoft.Extensions.Validation.GeneratorTests--net10.0.WorkItemExecution [Console] [Details] [Artifacts] [11.00% failure rate]
    [ 🚧 Report test infrastructure issue] [ 📄 Report test repository issue]
    This is a helix work item crash with status: BadExit. To investigate look the [Console log] / navigate to [Helix Artifacts]

    Failing Configurations (3)
    ❌ Microsoft.Extensions.Validation.GeneratorTests.ValidationsGeneratorTests.CanValidateTypeWithParsableProperties [Console] [Details] [Artifacts] [24.95% failure rate]
    [ 🚧 Report test infrastructure issue] [ 📄 Report test repository issue]

    Failing Configurations (3)
    Exception Message
    Assert.Collection() Failure: Item comparison failure
                                                                                         ↓ (pos 1)
Collection: [["DateOnlyWithRange"] = ["Date must be between 2023-01-01 and 2025-12-31"], ["DateTimeWithRange"] = ["DateTime must be between 2023-01-01 and 2025-12-31"], ["DecimalWithRange"] = ["Amount must be between 0.1 and 100.5"], ["TimeOnlyWithRequiredValue"] = ["The TimeOnlyWithRequiredValue field is required."], ["TimeSpanWithHourRange"] = ["Hours must be between 0 and 12"], ···]
Error:      Assert.Equal() Failure: Strings differ
                        ↓ (pos 1)
            Expected: "DecimalWithRange"
            Actual:   "DateTimeWithRange"
                        ↑ (pos 1)
            Stack Trace:
              D:�_work1ssrcValidation	estMicrosoft.Extensions.Validation.GeneratorTestsValidationsGenerator.Parsable.cs(96,0): at Microsoft.Extensions.Validation.GeneratorTests.ValidationsGeneratorTests.<>c.<CanValidateTypeWithParsableProperties>b__15_3(KeyValuePair`2 error)
    CallStack
       at Microsoft.Extensions.Validation.GeneratorTests.ValidationsGeneratorTests.<CanValidateTypeWithParsableProperties>b__15_0(Endpoint endpoint, IServiceProvider serviceProvider) in D:\a\_work\1\s\src\Validation\test\Microsoft.Extensions.Validation.GeneratorTests\ValidationsGenerator.Parsable.cs:line 88
   at Microsoft.Extensions.Validation.GeneratorTests.ValidationsGeneratorTestBase.VerifyEndpoint(Compilation compilation, String routePattern, Func`3 verifyFunc) in D:\a\_work\1\s\src\Validation\test\Microsoft.Extensions.Validation.GeneratorTests\ValidationsGeneratorTestBase.cs:line 120
   at Microsoft.Extensions.Validation.GeneratorTests.ValidationsGeneratorTests.CanValidateTypeWithParsableProperties() in D:\a\_work\1\s\src\Validation\test\Microsoft.Extensions.Validation.GeneratorTests\ValidationsGenerator.Parsable.cs:line 65
--- End of stack trace from previous location ---

🔹 [All failing tests from aspnetcore-components-e2e]

    ⚠️ 6 failing tests not displayed for this pipeline due to space limitations

    ❌ Microsoft.AspNetCore.Components.E2ETest.ServerExecutionTests.ServerVirtualizationTest.CanElevateEffectiveMaxItemCount_WhenOverscanExceedsMax [Details] [2.27% failure rate]
    [ 🚧 Report test infrastructure issue] [ 📄 Report test repository issue]

    Failing Configuration
    Exception Message
    OpenQA.Selenium.StaleElementReferenceException : stale element reference: stale element not found
  (Session info: chrome=143.0.7499.109); For documentation on this error, please visit: https://www.selenium.dev/documentation/webdriver/troubleshooting/errors#staleelementreferenceexception
    CallStack
       at OpenQA.Selenium.WebDriver.UnpackAndThrowOnError(Response errorResponse, String commandToExecute)
   at OpenQA.Selenium.WebDriver.ExecuteAsync(String driverCommandToExecute, Dictionary`2 parameters)
   at OpenQA.Selenium.WebDriver.Execute(String driverCommandToExecute, Dictionary`2 parameters)
   at OpenQA.Selenium.WebElement.get_Text()
   at Microsoft.AspNetCore.Components.E2ETest.Tests.VirtualizationTest.<>c__DisplayClass21_0.<CanElevateEffectiveMaxItemCount_WhenOverscanExceedsMax>g__GetVisibleItemIndices|3() in /home/vsts/work/1/s/src/Components/test/E2ETest/Tests/VirtualizationTest.cs:line 658
   at Microsoft.AspNetCore.Components.E2ETest.Tests.VirtualizationTest.CanElevateEffectiveMaxItemCount_WhenOverscanExceedsMax() in /home/vsts/work/1/s/src/Components/test/E2ETest/Tests/VirtualizationTest.cs:line 582
   at InvokeStub_VirtualizationTest.CanElevateEffectiveMaxItemCount_WhenOverscanExceedsMax(Object, Object, IntPtr*)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
    ❌ Microsoft.AspNetCore.Components.E2ETests.ServerRenderingTests.EndpointsServerReconnectionTest.RootComponentOperation_Add_WaitsUntilReconnection [Details] [2.02% failure rate]
    [ 🚧 Report test infrastructure issue] [ 📄 Report test repository issue]

    Failing Configuration
    Exception Message
    OpenQA.Selenium.BrowserAssertFailedException : Xunit.Sdk.EqualException: Assert.Equal() Failure: Values differ
Expected: False
Actual:   True
   at Xunit.Assert.Equal[T](T expected, T actual, IEqualityComparer`1 comparer) in /_/src/xunit.assert/Asserts/EqualityAsserts.cs:line 154
   at Microsoft.AspNetCore.E2ETesting.WaitAssert.<>c__DisplayClass20_0.<WaitAssertCore>b__0() in /home/vsts/work/1/s/src/Shared/E2ETesting/WaitAssert.cs:line 91
   at Microsoft.AspNetCore.E2ETesting.WaitAssert.<>c__DisplayClass21_0`1.<WaitAssertCore>b__0(IWebDriver _) in /home/vsts/work/1/s/src/Shared/E2ETesting/WaitAssert.cs:line 109
Screen shot captured at '/home/vsts/work/1/s/src/Components/test/E2ETest/bin/screenshots/3a80fc080d4b490991053d0fab48fcee.png'
Encountered browser errors
[2026-01-07T18:56:52Z] [Warning] http://127.0.0.1:36537/subdir/_framework/blazor.web.8tw1w2j9ea.js 0:59608 "[2026-01-07T18:56:52.322Z] Warning: Initializer 'http://127.0.0.1:36537/subdir/BasicTestApp.vpc4xa0l6h.lib.module.js' will be ignored because multiple runtimes are available. Use 'before(Web|WebAssembly|Server)Start' and 'after(Web|WebAssembly|Server)Started' instead."
[2026-01-07T18:56:52Z] [Warning] http://127.0.0.1:36537/subdir/_framework/blazor.web.8tw1w2j9ea.js 0:59608 "[2026-01-07T18:56:52.322Z] Warning: Initializer 'http://127.0.0.1:36537/subdir/JSInitializers/Classic/BasicTestApp.j2kfp6tx1s.lib.module.js' will be ignored because multiple runtimes are available. Use 'before(Web|WebAssembly|Server)Start' and 'after(Web|WebAssembly|Server)Started' instead."
[2026-01-07T18:56:52Z] [Info] http://127.0.0.1:36537/subdir/_framework/blazor.web.8tw1w2j9ea.js 0:73094 "[2026-01-07T18:56:52.397Z] Information: Normalizing '_blazor' to 'http://127.0.0.1:36537/subdir/_blazor'."
[2026-01-07T18:56:52Z] [Info] http://127.0.0.1:36537/subdir/_framework/blazor.web.8tw1w2j9ea.js 0:73094 "[2026-01-07T18:56:52.402Z] Information: WebSocket connected to ws://127.0.0.1:36537/subdir/_blazor?id=mzrDxFTEmEXZFKAnu7sFRg."
[2026-01-07T18:56:52Z] [Info] http://127.0.0.1:36537/subdir/_framework/blazor.web.8tw1w2j9ea.js 0:73094 "[2026-01-07T18:56:52.451Z] Information: Connection disconnected."
[2026-01-07T18:56:52Z] [Warning] http://127.0.0.1:36537/subdir/_framework/blazor.web.8tw1w2j9ea.js 0:59608 "[2026-01-07T18:56:52.538Z] Warning: Initializer 'http://127.0.0.1:36537/subdir/BasicTestApp.vpc4xa0l6h.lib.module.js' will be ignored because multiple runtimes are available. Use 'before(Web|WebAssembly|Server)Start' and 'after(Web|WebAssembly|Server)Started' instead."
[2026-01-07T18:56:52Z] [Warning] http://127.0.0.1:36537/subdir/_framework/blazor.web.8tw1w2j9ea.js 0:59608 "[2026-01-07T18:56:52.539Z] Warning: Initializer 'http://127.0.0.1:36537/subdir/JSInitializers/Classic/BasicTestApp.j2kfp6tx1s.lib.module.js' will be ignored because multiple runtimes are available. Use 'before(Web|WebAssembly|Server)Start' and 'after(Web|WebAssembly|Server)Started' instead."
[2026-01-07T18:56:52Z] [Info] http://127.0.0.1:36537/subdir/_framework/blazor.web.8tw1w2j9ea.js 0:73094 "[2026-01-07T18:56:52.542Z] Information: Normalizing '_blazor' to 'http://127.0.0.1:36537/subdir/_blazor'."
[2026-01-07T18:56:52Z] [Info] http://127.0.0.1:36537/subdir/_framework/blazor.web.8tw1w2j9ea.js 0:73094 "[2026-01-07T18:56:52.552Z] Information: WebSocket connected to ws://127.0.0.1:36537/subdir/_blazor?id=6oMK6Uq9_i_78MiD9_1LrQ."Page content:
<head><meta charset="utf-8">
    <base href="/subdir/">
    </head>
<body><nav><a href="nav">Home</a> |
    <a href="streaming">Streaming</a> |
    <a href="large-streaming">Large Streaming</a> |
    <a href="streaming-interactivity" class="active" aria-current="page">Streaming with interactivity</a> |
    <a href="nav/give-404-with-content">Error page with 404 content</a> |
    <a href="nav/nonexistent-page">Error page with no content</a> |
    <a href="nav/non-html-response">Non-HTML page</a> |
    <a href="nav/non-blazor-html-response">Non-Blazor HTML page</a> |
    <a href="nav/scroll-to
    CallStack
       at Microsoft.AspNetCore.E2ETesting.WaitAssert.WaitAssertCore[TResult](IWebDriver driver, Func`1 assertion, TimeSpan timeout) in /home/vsts/work/1/s/src/Shared/E2ETesting/WaitAssert.cs:line 137
   at Microsoft.AspNetCore.E2ETesting.WaitAssert.Equal[T](IWebDriver driver, T expected, Func`1 actual) in /home/vsts/work/1/s/src/Shared/E2ETesting/WaitAssert.cs:line 27
   at Microsoft.AspNetCore.Components.E2ETests.ServerRenderingTests.EndpointsServerReconnectionTest.RootComponentOperation_Add_WaitsUntilReconnection() in /home/vsts/work/1/s/src/Components/test/E2ETest/ServerRenderingTests/EndpointsServerReconnectionTest.cs:line 101
   at InvokeStub_EndpointsServerReconnectionTest.RootComponentOperation_Add_WaitsUntilReconnection(Object, Object, IntPtr*)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
----- Inner Stack Trace -----
   at Microsoft.AspNetCore.E2ETesting.WaitAssert.<>c__DisplayClass20_0.<WaitAssertCore>b__0() in /home/vsts/work/1/s/src/Shared/E2ETesting/WaitAssert.cs:line 91
   at Microsoft.AspNetCore.E2ETesting.WaitAssert.<>c__DisplayClass21_0`1.<WaitAssertCore>b__0(IWebDriver _) in /home/vsts/work/1/s/src/Shared/E2ETesting/WaitAssert.cs:line 109
    ❌ Microsoft.AspNetCore.Components.E2ETests.ServerRenderingTests.EndpointsServerReconnectionTest.RootComponentOperation_Remove_WaitsUntilReconnection [Details] [2.02% failure rate]
    [ 🚧 Report test infrastructure issue] [ 📄 Report test repository issue]

    Failing Configuration
    Exception Message
    OpenQA.Selenium.BrowserAssertFailedException : OpenQA.Selenium.JavaScriptException: javascript error: Cannot read properties of undefined (reading 'style')
  (Session info: chrome=143.0.7499.109)
   at OpenQA.Selenium.WebDriver.UnpackAndThrowOnError(Response errorResponse, String commandToExecute)
   at OpenQA.Selenium.WebDriver.ExecuteAsync(String driverCommandToExecute, Dictionary`2 parameters)
   at OpenQA.Selenium.WebDriver.Execute(String driverCommandToExecute, Dictionary`2 parameters)
   at Microsoft.AspNetCore.Components.E2ETests.ServerRenderingTests.EndpointsServerReconnectionTest.<>c__DisplayClass6_0.<RootComponentOperation_Remove_WaitsUntilReconnection>b__3() in /home/vsts/work/1/s/src/Components/test/E2ETest/ServerRenderingTests/EndpointsServerReconnectionTest.cs:line 172
   at Microsoft.AspNetCore.E2ETesting.WaitAssert.<>c__DisplayClass20_0.<WaitAssertCore>b__0() in /home/vsts/work/1/s/src/Shared/E2ETesting/WaitAssert.cs:line 91
   at Microsoft.AspNetCore.E2ETesting.WaitAssert.<>c__DisplayClass21_0`1.<WaitAssertCore>b__0(IWebDriver _) in /home/vsts/work/1/s/src/Shared/E2ETesting/WaitAssert.cs:line 109
Screen shot captured at '/home/vsts/work/1/s/src/Components/test/E2ETest/bin/screenshots/72f413e40eee44668c5000e442d8083a.png'
Page content:
<head><meta charset="utf-8">
    <base href="/subdir/">
    </head>
<body><nav><a href="nav">Home</a> |
    <a href="streaming">Streaming</a> |
    <a href="large-streaming">Large Streaming</a> |
    <a href="streaming-interactivity" class="active" aria-current="page">Streaming with interactivity</a> |
    <a href="nav/give-404-with-content">Error page with 404 content</a> |
    <a href="nav/nonexistent-page">Error page with no content</a> |
    <a href="nav/non-html-response">Non-HTML page</a> |
    <a href="nav/non-blazor-html-response">Non-Blazor HTML page</a> |
    <a href="nav/scroll-to-hash#some-content">Scroll to hash</a> |
    <a href="nav/throw-while-streaming">Error while streaming</a> |
    <a href="nav/interactive-component-navigation/server">Interactive component navigation (server)</a> |
    <a href="nav/interactive-component-navigation/webassembly">Interactive component navigation (webassembly)</a> |
    <a href="nav/list-headers">List headers</a> |
    <a href="nav/preserve-content">Preserve content</a>
    <span data-enhance-nav="false"><a href="nav/other"><span id="not-enhanced-nav-link">Other (no enhanced nav)</span></a> |
        <span data-enhance-nav=""><a href="nav/other">Other (re-enabled enhanced nav)</a> |
        </span></span>
    <a href="nav/location-changed/server">LocationChanged/LocationChanging event (server)</a>
    <a href="nav/location-changed/wasm">LocationChanged/LocationChanging event (wasm)</a>
    <a href="nav/location-changed/server-and-wasm">LocationChanged/LocationChanging event (server-and-wasm)</a>
    <a href="nav/null-parameter/server">Null component parameter (server)</a>
    <a href="nav/null-parameter/wasm">Null component parameter (wasm)</a>
    <a href="nav/prevent-default-link">PreventDefault link test</a>
    <br>
    <a href="nav/other" data-enhance-nav="false"><svg width="100" height="100" id="svg-in-anchor-not-enhanced-nav-link"><rect width="50" height="50" style="fill:rgb(0,0,255);"></rect></svg></a>
    <svg width="100px" height="30px" id="svg-nav-link"><a href="nav/other"><text x="15" y="15" font-size="15">Other SVG</text></a></svg>
    <br>
    <svg width="200px" height="30px" id="svg-not-enhanced-nav-link" data-enhance-nav="false"><a href="nav/other"><text x="15" y="15" font-size="15">Other SVG (no enhanced nav)</text></a></svg>
    <br></nav>
<hr>
<main><!--bl:36--><h1>Streaming Rendering with Interactivity</h1>

    <!--bl:37--><h3>Current status:</h3>
    

    <p id="status">Not streaming</p><p>
    
All counter action links will work via enhanced navigation. Interactivity will start immediately
    
for newly-added components.
    
</p>
    
<p>
    
When running this page manually, you can click the links normally an

    CallStack
       at Microsoft.AspNetCore.E2ETesting.WaitAssert.WaitAssertCore[TResult](IWebDriver driver, Func`1 assertion, TimeSpan timeout) in /home/vsts/work/1/s/src/Shared/E2ETesting/WaitAssert.cs:line 137
   at Microsoft.AspNetCore.E2ETesting.WaitAssert.Equal[T](IWebDriver driver, T expected, Func`1 actual) in /home/vsts/work/1/s/src/Shared/E2ETesting/WaitAssert.cs:line 27
   at Microsoft.AspNetCore.Components.E2ETests.ServerRenderingTests.EndpointsServerReconnectionTest.RootComponentOperation_Remove_WaitsUntilReconnection() in /home/vsts/work/1/s/src/Components/test/E2ETest/ServerRenderingTests/EndpointsServerReconnectionTest.cs:line 172
   at InvokeStub_EndpointsServerReconnectionTest.RootComponentOperation_Remove_WaitsUntilReconnection(Object, Object, IntPtr*)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
----- Inner Stack Trace -----
   at OpenQA.Selenium.WebDriver.UnpackAndThrowOnError(Response errorResponse, String commandToExecute)
   at OpenQA.Selenium.WebDriver.ExecuteAsync(String driverCommandToExecute, Dictionary`2 parameters)
   at OpenQA.Selenium.WebDriver.Execute(String driverCommandToExecute, Dictionary`2 parameters)
   at Microsoft.AspNetCore.Components.E2ETests.ServerRenderingTests.EndpointsServerReconnectionTest.<>c__DisplayClass6_0.<RootComponentOperation_Remove_WaitsUntilReconnection>b__3() in /home/vsts/work/1/s/src/Components/test/E2ETest/ServerRenderingTests/EndpointsServerReconnectionTest.cs:line 172
   at Microsoft.AspNetCore.E2ETesting.WaitAssert.<>c__DisplayClass20_0.<WaitAssertCore>b__0() in /home/vsts/work/1/s/src/Shared/E2ETesting/WaitAssert.cs:line 91
   at Microsoft.AspNetCore.E2ETesting.WaitAssert.<>c__DisplayClass21_0`1.<WaitAssertCore>b__0(IWebDriver _) in /home/vsts/work/1/s/src/Shared/E2ETesting/WaitAssert.cs:line 109

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