type-of(1 * 1#{$unit}) should be a number

[Anthony-Gaudino]

In my code, using the latest version of node-sass I'm trying to add a unit to a number like bellow, which is resulting in a string type. I expected it to be a number type.

Minimal example on libsass.ocbnet.ch

input.scss

$unit: "px";
@debug type-of(1 * 1#{$unit});  // string

Actual results

string

Expected result

number

On this website http://beautifytools.com/scss-compiler.php I get the expected number result using the following code:

$unit: "em";
$res: 1 * 1#{$unit};

a {
  resttype: type-of($res);
  res: $res;
}

a {
	resttype: number;
	res: 1em;
}

version info:

node-sass	4.14.1	(Wrapper)	[JavaScript]
libsass  	3.5.5	(Sass Compiler)	[C/C++]

[stof]

Running that in dart-sass does not give a number. It gives a list (with a number as first element and a string as second element)

[mgreter]

As noted, LibSass 4.0 WIP branch will also results list here now (which is correct).
Can't close yet, since that is not yet merged and current master produces string.

[stof]

yeah, but in any case, the "expected result" described in this issue is wrong. I have no idea what compiler is used by https://beautifytools.com/scss-compiler.php, but it is a broken one.

[stof]

@Anthony-Gaudino for reference, https://www.sassmeister.com/ is a much better online tool to test a sass compiler online, as it uses the official implementation (even though not the latest one currently)