add fix #670

Author: Freymaurer

docs/package.json

@@ -6,9 +6,9 @@
     "fable": "dotnet fable ./docs/feliz-docs/Feliz.Docs.fsproj -o ./docs/feliz-docs/fableoutput --exclude Feliz.CompilerPlugins -e .jsx",
     "docusaurus": "docusaurus",
     "start": "npm run fable -- --watch --run docusaurus start",
-    "build": "docusaurus build",
+    "build": "npm run fable -- --run docusaurus build",
     "swizzle": "docusaurus swizzle",
-    "deploy": "docusaurus deploy",
+    "deploy": "npm run fable -- --run docusaurus deploy",
     "clear": "docusaurus clear",
     "serve": "docusaurus serve",
     "write-translations": "docusaurus write-translations",

src/Feliz/Length.fs

@@ -142,4 +142,4 @@ type length =
     static member inline maxContent : ICssUnit = unbox "max-content"
 
     /// Allows specifying custom ICssUnits
-    static member inline custom (cssUnit: string) = unbox cssUnit
+    static member inline custom (cssUnit: string) : ICssUnit = unbox cssUnit