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TODO list single-page application using GHCJS
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| cabal-version: 3.0 | |
| name: ghcjs-demo | |
| version: 1.0.0 | |
| license: BSD-3-Clause | |
| executable ghcjs-demo | |
| main-is: Main.hs | |
| build-depends: base | |
| , ghcjs-base | |
| default-language: Haskell2010 |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script language="javascript" src="build/rts.js"></script> | |
| <script language="javascript" src="build/lib.js"></script> | |
| <script language="javascript" src="build/out.js"></script> | |
| </head> | |
| <body> | |
| <button id="click me" type="button">+</button> | |
| </body> | |
| <script language="javascript"> | |
| function replaceChildrenWorkaround(a, b) { | |
| a.replaceChildren(...b) | |
| } | |
| </script> | |
| <script language="javascript" src="build/runmain.js" defer></script> | |
| </html> |
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| {-# LANGUAGE BlockArguments #-} | |
| {-# LANGUAGE OverloadedStrings #-} | |
| module Main where | |
| import Data.JSString (JSString) | |
| import GHCJS.Foreign.Callback (Callback) | |
| import GHCJS.Types (JSVal) | |
| import JavaScript.Array (JSArray) | |
| import qualified Data.JSString as JSString | |
| import qualified GHCJS.Foreign.Callback as Callback | |
| import qualified JavaScript.Array as Array | |
| foreign import javascript unsafe "document.getElementById($1)" | |
| getElementById :: JSString -> IO JSVal | |
| foreign import javascript unsafe "$1.textContent = $2" | |
| setTextContent :: JSVal -> JSString -> IO () | |
| foreign import javascript unsafe "$1.addEventListener($2, $3)" | |
| addEventListener :: JSVal -> JSString -> Callback (IO ()) -> IO () | |
| foreign import javascript unsafe "document.createElement($1)" | |
| createElement :: JSString -> IO JSVal | |
| foreign import javascript unsafe "$1.before($2)" | |
| before :: JSVal -> JSVal -> IO () | |
| foreign import javascript unsafe "$1.setAttribute($2, $3)" | |
| setAttribute :: JSVal -> JSString -> JSString -> IO () | |
| foreign import javascript unsafe "replaceChildrenWorkaround($1, $2)" | |
| replaceChildren_ :: JSVal -> JSArray -> IO () | |
| replaceChildren :: JSVal -> [JSVal] -> IO () | |
| replaceChildren a b = replaceChildren_ a (Array.fromList b) | |
| foreign import javascript unsafe "$1.remove()" | |
| remove :: JSVal -> IO () | |
| main :: IO () | |
| main = do | |
| addButton <- getElementById "click me" | |
| addCallback <- Callback.asyncCallback do | |
| subtractButton <- createElement "button" | |
| setTextContent subtractButton "-" | |
| input <- createElement "input" | |
| setAttribute input "type" "text" | |
| div <- createElement "div" | |
| replaceChildren div [ subtractButton, input ] | |
| subtractCallback <- Callback.asyncCallback (remove div) | |
| addEventListener subtractButton "click" subtractCallback | |
| before addButton div | |
| addEventListener addButton "click" addCallback |
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| let | |
| nixpkgs = builtins.fetchTarball { | |
| url = "https://github.com/NixOS/nixpkgs/archive/21a3136d25e1652cb32197445e9799e6a5154588.tar.gz"; | |
| sha256 = "145d474g6dngvaiwq2whqdvaq14ba9pc5pvvcz4x8l2bkwbyn3hg"; | |
| }; | |
| overlay = pkgsNew: pkgsOld: { | |
| haskell = pkgsOld.haskell // { | |
| packages = pkgsOld.haskell.packages // { | |
| ghcjs = pkgsOld.haskell.packages.ghcjs.override (old: { | |
| overrides = | |
| let | |
| oldOverrides = old.overrides or (_: _: {}); | |
| sourceOverrides = pkgsNew.haskell.lib.packageSourceOverrides { | |
| ghcjs-demo = ./.; | |
| }; | |
| in | |
| pkgsNew.lib.composeExtensions oldOverrides sourceOverrides; | |
| }); | |
| }; | |
| }; | |
| }; | |
| config = { }; | |
| pkgs = import nixpkgs { inherit config; overlays = [ overlay ]; }; | |
| in | |
| pkgs.haskell.packages.ghcjs.ghcjs-demo.env |
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