How can i convert a sed command to its PowerShell equivalent?

Question

Editor's note:

• The macOS sed command below performs an in-place (-i '') string-substitution (string-replacement) operation on the given file, i.e. it transforms the file's existing content. The specific substitution shown, s/././g, replaces all non-newline characters (regex metacharacter .) with verbatim . characters, so be careful when trying the command yourself.

• While the intended question may ultimately be a different one, as written the question is well-defined, and can be answered to show the full PowerShell equivalent of the sed command (a partial translation is in the question itself), notably including the in-place updating of the file.

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I have a mac command and i need it to run on windows. I have no experience in mac whatsoever.

sed -i '' 's/././g' dist/index.html

After research i found that i should use

get-content path | %{$_ -replace 'expression','replace'}

but can't get it to work yet.