fix opacity for labels

ci/release/changelogs/next.md

@@ -18,6 +18,7 @@
 - Fixes tooltip/link attributes being ignored for `sql_table` and `class`. [#658](https://github.com/terrastruct/d2/pull/658)
 - Fixes arrowheads sometimes appearing broken with sketch on. [#656](https://github.com/terrastruct/d2/pull/656)
 - Fixes code snippets not being tall enough with leading newlines. [#664](https://github.com/terrastruct/d2/pull/664)
+- Opacity was not being applied to labels of shapes (and other edge cases). [#677](https://github.com/terrastruct/d2/pull/677)
 - Icon URLs that needed escaping (e.g. with ampersands) are handled correctly by CLI. [#666](https://github.com/terrastruct/d2/pull/666)
 - Fixes markdown shapes being slightly too short for their text in some cases. [#665](https://github.com/terrastruct/d2/pull/665)
 - Fixes self-connections inside layouts when using ELK. [#676](https://github.com/terrastruct/d2/pull/676)

d2renderers/d2sketch/sketch_test.go

@@ -326,6 +326,25 @@ a.9 <-> b.9: cf-one-required {
 	source-arrowhead.shape: cf-one-required
 	target-arrowhead.shape: cf-one-required
 }
+`,
+		},
+		{
+			name: "opacity",
+			script: `x.style.opacity: 0.4
+y: |md
+  linux: because a PC is a terrible thing to waste
+| {
+	style.opacity: 0.4
+}
+x -> a: {
+  label: You don't have to know how the computer works,\njust how to work the computer.
+  style.opacity: 0.4
+}
+users: {
+	shape: sql_table
+	last_login: datetime
+	style.opacity: 0.4
+}
 `,
 		},
 	}