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Showing content from https://learn.microsoft.com/en-us/powershell/scripting/whats-new/what-s-new-in-powershell-74 below:

What's New in PowerShell 7.4 - PowerShell

PowerShell 7.4.11 includes the following features, updates, and breaking changes. PowerShell 7.4.10 is built on .NET 8.0.411.

For a complete list of changes, see the CHANGELOG in the GitHub repository.

• Nano server docker images aren't available for this release
• Added the ProgressAction parameter to the Common Parameters
• Update some PowerShell APIs to throw ArgumentException instead of ArgumentNullException when the argument is an empty string (#19215) (Thanks @xtqqczze!)
• Remove code related to #Requires -PSSnapin (#19320)
• Test-Json now uses JsonSchema.NET instead of Newtonsoft.Json.Schema.
  • With this change, Test-Json no longer supports the older Draft 4 schemas. (#18141) (Thanks @gregsdennis!). For more information about JSON schemas, see JSON Schema documentation. This also breaks Test-Json for JSON and JSONC files with comments.
  • ConvertFrom-Json support still uses Newtonsoft.Json.Schema so it can convert JSON files with comments.
• Output from Test-Connection now includes more detailed information about TCP connection tests
• .NET introduced changes that affected Test-Connection. The cmdlet now returns an error about the need to use sudo on Linux platforms when using a custom buffer size (#20369)
• Experimental feature PSNativeCommandPreserveBytePipe is now mainstream. PowerShell now preserves the byte-stream data when redirecting the stdout stream of a native command to a file or when piping byte-stream data to the stdin stream of a native command.
• Change how relative paths in Resolve-Path are handled when using the RelativeBasePath parameter (#19755) (Thanks @MartinGC94!)
• Remove unused PSv2 code - removes TabExpansion function (#18337)

The Windows MSI package now provides an option to disable PowerShell telemetry during installation. For more information, see Install the msi package from the command line.

PowerShell 7.4 includes Microsoft.PowerShell.PSResourceGet v1.0.1. This module is installed side-by-side with PowerShellGet v2.2.5 and PackageManagement v1.4.8.1. For more information, see the documentation for Microsoft.PowerShell.PSResourceGet.

PowerShell 7.4 now includes PSReadLine v2.3.4. For more information, see the documentation for PSReadLine.

Many thanks to @MartinGC94 and others for all their work to improve tab completion.

• Fix issue when completing the first command in a script with an empty array expression (#18355)
• Fix positional argument completion (#17796)
• Prioritize the default parameter set when completing positional arguments (#18755)
• Improve pseudo binding for dynamic parameters (#18030)
• Improve type inference of hashtable keys (#17907)
• Fix type inference error for empty return statements (#18351)
• Improve type inference for Get-Random (#18972)
• Fix type inference for all scope variables (#18758)
• Improve enumeration of inferred types in pipeline (#17799)
• Add completion for values in comparisons when comparing Enums (#17654)
• Add property assignment completion for enums (#19178)
• Fix completion for PSCustomObject variable properties (#18682)
• Fix member completion in attribute argument (#17902)
• Exclude redundant parameter aliases from completion results (#19382)
• Fix class member completion for classes with base types (#19179)
• Add completion for the using keyword (#16514)
• Fix TabExpansion2 variable leak when completing variables (#18763)
• Enable completion of variables across ScriptBlock scopes (#19819)
• Fix completion of the foreach statement variable (#19814)
• Fix variable type inference precedence (#18691)
• Fix member completion for PowerShell Enum class (#19740)
• Fix parsing for array literals in index expressions in method calls (#19224)
• Improve path completion (#19489)
• Fix an indexing out of bound error in CompleteInput for empty script input (#19501)
• Improve variable completion performance (#19595)
• Improve Hashtable key completion for type constrained variable assignments, nested Hashtables and more (#17660)
• Infer external application output as strings (#19193)
• Update parameter completion for enums to exclude values not allowed by ValidateRange attributes (#17750) (Thanks @fflaten!).
• Fix dynamic parameter completion (#19510)
• Add completion for variables assigned by the data statement (#19831)
• Fix expanding tilde (~) on Windows systems to $HOME to prevent breaking use cases with native commands (#21529)

Many thanks to @CarloToso and others for all the work on improving web cmdlets.

• Fix decompression in web cmdlets to include Brotli (#17955) (Thanks @iSazonov!)
• Webcmdlets add 308 to redirect codes and small cleanup (#18536)
• Complete the progress bar rendering in Invoke-WebRequest when downloading is complete or cancelled (#18130)
• Web cmdlets get Retry-After interval from response headers if the status code is 429 (#18717)
• Web cmdlets set default charset encoding to UTF8 (#18219)
• Preserve WebSession.MaximumRedirection from changes (#19190)
• WebCmdlets parse XML declaration to get encoding value, if present. (#18748)
• Fix using xml -Body in webcmdlets without an encoding (#19281)
• Adjust PUT method behavior to POST one for default content type in WebCmdlets (#19152)
• Take into account ContentType from Headers in WebCmdlets (#19227)
• Allow to preserve the original HTTP method by adding -PreserveHttpMethodOnRedirect to Web cmdlets (#18894)
• Webcmdlets display an error on https to http redirect (#18595)
• Add AllowInsecureRedirect switch to Web cmdlets (#18546)
• Improve verbose message in web cmdlets when content length is unknown (#19252)
• Build the relative URI for links from the response in Invoke-WebRequest (#19092)
• Fix redirection for -CustomMethod POST in WebCmdlets (#19111)
• Dispose previous response in Webcmdlets (#19117)
• Improve Invoke-WebRequest xml and json errors format (#18837)
• Add ValidateNotNullOrEmpty to OutFile and InFile parameters of WebCmdlets (#19044)
• HttpKnownHeaderNames update headers list (#18947)
• Invoke-RestMethod -FollowRelLink fix links containing commas (#18829)
• Fix bug with managing redirection and KeepAuthorization in Web cmdlets (#18902)
• Add StatusCode to HttpResponseException (#18842)
• Support HTTP persistent connections in Web Cmdlets (#19249) (Thanks @stevenebutler!)
• Small cleanup Invoke-RestMethod (#19490)
• Improve the verbose message of WebCmdlets to show correct HTTP version (#19616)
• Add FileNameStar to MultipartFileContent in WebCmdlets (#19467)
• Fix HTTP status from 409 to 429 for WebCmdlets to get retry interval from Retry-After header. (#19622) (Thanks @mkht!)
• Change -TimeoutSec to -ConnectionTimeoutSeconds and add -OperationTimeoutSeconds to web cmdlets (#19558) (Thanks @stevenebutler!) Other cmdlets
• Support Ctrl+c when connection hangs while reading data in WebCmdlets (#19330) (Thanks @stevenebutler!)
• Support Unix domain socket in WebCmdlets (#19343)

• Test-Connection now returns error about the need to use sudo on Linux platforms when using a custom buffer size (#20369)
• Add output types to Format commands (#18746) (Thanks @MartinGC94!)
• Add output type attributes for Get-WinEvent (#17948) (Thanks @MartinGC94!)
• Add Path and LiteralPath parameters to Test-Json cmdlet (#19042) (Thanks @ArmaanMcleod!)
• Add NoHeader parameter to ConvertTo-Csv and Export-Csv cmdlets (#19108) (Thanks @ArmaanMcleod!)
• Add Confirm and WhatIf parameters to Stop-Transcript(#18731) (Thanks @JohnLBevan!)
• Add FuzzyMinimumDistance parameter to Get-Command (#18261)
• Make Encoding parameter able to take ANSI encoding in PowerShell (#19298) (Thanks @CarloToso!)
• Add progress to Copy-Item (#18735)
• Update-Help now reports an error when using implicit culture on non-US systems. (#17780) (Thanks @dkaszews!)
• Don't require activity when creating a completed progress record (#18474) (Thanks @MartinGC94!)
• Disallow negative values for Get-Content cmdlet parameters -Head and -Tail (#19715) (Thanks @CarloToso!)
• Make Update-Help throw proper error when current culture isn't associated with a language (#19765) (Thanks @josea!)
• Allow combining of -Skip and -SkipLast parameters in Select-Object cmdlet. (#18849) (Thanks @ArmaanMcleod!)
• Add Get-SecureRandom cmdlet (#19587)
• Set-Clipboard -AsOSC52 for remote usage (#18222) (Thanks @dkaszews!)
• Speed up Resolve-Path relative path resolution (#19171) (Thanks @MartinGC94!)
• Added the switch parameter -CaseInsensitive to Select-Object and Get-Unique cmdlets (#19683) (Thanks @ArmaanMcleod!)
• Restart-Computer and Stop-Computer should fail with error when not running via sudo on Unix (#19824)

Updates to $PSStyle

• Adds Dim and DimOff properties (#18653)
• Added static methods to the PSStyle class that map foreground and background ConsoleColor values to ANSI escape sequences (#17938)
• Table headers for calculated fields are formatted in italics by default
• Add support of respecting $PSStyle.OutputRendering on the remote host (#19601)
• Updated telemetry data to include use of CrescendoBuilt modules (#20371)

Other Engine updates

• Move .NET method invocation logging to after the needed type conversion is done for method arguments (#25568)
• Fallback to AppLocker after WldpCanExecuteFile (#25229)
• Make PowerShell class not affiliate with Runspace when declaring the NoRunspaceAffinity attribute (#18138)
• Add the ValidateNotNullOrWhiteSpace attribute (#17191) (Thanks @wmentha!)
• Add sqlcmd to the list for legacy argument passing (#18559)
• Add the function cd~ (#18308) (Thanks @GigaScratch!)
• Fix array type parsing in generic types (#19205) (Thanks @MartinGC94!)
• Fix wildcard globbing in root of device paths (#19442) (Thanks @MartinGC94!)
• Add a public API for getting locations of PSModulePath elements (#19422)
• Fix incorrect string to type conversion (#19560) (Thanks @MartinGC94!)
• Fix slow execution when many breakpoints are used (#14953) (Thanks @nohwnd!)
• Remove code related to #Requires -PSSnapin (#19320)

PowerShell 7.4 introduces the following experimental features:

• PSFeedbackProvider - Replaces the hard-coded suggestion framework with an extensible feedback provider.
  • This feature also adds the FeedbackName, FeedbackText, and FeedbackAction properties to $PSStyle.Formatting that allow you to change the formatting of feedback messages.
• PSModuleAutoLoadSkipOfflineFiles - Module discovery now skips over files that are marked by cloud providers as not fully on disk.
• PSCommandWithArgs - Add support for passing arguments to commands as a single string

The following experimental features became mainstream:

• PSConstrainedAuditLogging
• PSCustomTableHeaderLabelDecoration
• PSNativeCommandErrorActionPreference
• PSNativeCommandPreserveBytePipe
• PSWindowsNativeCommandArgPassing

PowerShell 7.4 changed the following experimental features:

• PSCommandNotFoundSuggestion - This feature now uses an extensible feedback provider rather than hard-coded suggestions (#18726)

For more information about the Experimental Features, see Using Experimental Features.

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