Powershell cannot expand this javascript content

Question

Applying the answer to my previous question How to expand file content with powershell

I stumbled upon a fatal error when trying to expand this :

test.js:

<script type="text/javascript">
    $('.mylink').click(function(event) {
        var hash = $(this).attr("href");
    });
    // $var
</script>

test.ps1

$test = get-content -raw test.html
$var = "test"

# Write to output file using UTF-8 encoding *without a BOM*.
[IO.File]::WriteAllText(
  "$PWD/out.html",
  $ExecutionContext.InvokeCommand.ExpandString($test)
)

$ is a special symbol in PS and $() denotes an inlined expression so you'll need to escape it before expansion: expandString(($test -replace '\$\(', '`$(')) — woxxom
– woxxom, Commented Mar 2, 2017 at 5:50
@wOxxOm how do you expand a powershell $var if you replace all $ ? — user310291
– user310291, Commented Mar 3, 2017 at 14:11
Hmm, vars isn't a problem because my suggestion is to replace $( which cannot be a part of an identifier. However, if you use PowerShell's $() then it's a problem that would require a smarter replacement algorithm to differentiate between jQuery and PS. — woxxom
– woxxom, Commented Mar 3, 2017 at 14:13

woxxom · Accepted Answer · 2017-03-03 14:28:02Z

2

$ is a special symbol in PowerShell and $() denotes an inlined expression expanded with its contents so you'll need to escape it before expansion by adding a backtick ` before $(:

$ExecutionContext.InvokeCommand.ExpandString(($test -replace '\$\(', '`$('))

However, if you use PowerShell's $() in the template then it's a problem that would require a smarter replacement and probably much more complex algorithm to differentiate between jQuery and PS.

answered Mar 3, 2017 at 14:28

woxxom

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2 Comments

user310291 Over a year ago

I don't understand why it works except for app.controller('Ctrl', function($scope, $window, $sce) {} which gives empty var for $scope, $windows and $sce: app.controller('Ctrl', function(, , ) {}

woxxom Over a year ago

Your original question is about preventing expansion of $() expressions which is why the answer deals only with that.

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