From 27d2978e5412f2bef4448e208182a03137dd5ee8 Mon Sep 17 00:00:00 2001 From: Josh Meredith Date: Mon, 6 Mar 2023 09:18:03 +0000 Subject: Base/JS: GHC.JS.Foreign.Callback module (issue 23126) * Add the Callback module for "exporting" Haskell functions to be available to plain JavaScript code * Fix some primitives defined in GHC.JS.Prim * Add a JavaScript section to the user guide with instructions on how to use the JavaScript FFI, building up to using Callbacks to interact with the browser * Add tests for the JavaScript FFI and Callbacks --- testsuite/tests/javascript/js-ffi-array.hs | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 testsuite/tests/javascript/js-ffi-array.hs (limited to 'testsuite/tests/javascript/js-ffi-array.hs') diff --git a/testsuite/tests/javascript/js-ffi-array.hs b/testsuite/tests/javascript/js-ffi-array.hs new file mode 100644 index 0000000000..00e1e80383 --- /dev/null +++ b/testsuite/tests/javascript/js-ffi-array.hs @@ -0,0 +1,18 @@ +import GHC.JS.Prim + +foreign import javascript "((xs) => { console.log(xs) })" + log_js :: JSVal -> IO () + +foreign import javascript "((xs,i) => { return xs[i]; })" + js_index :: JSVal -> JSVal -> JSVal + +foreign import javascript "(() => { return ['t','e','s','t']; })" + an_array :: JSVal + +main :: IO () +main = do + log_js =<< toJSArray [] + log_js =<< toJSArray [jsNull, toJSInt 0, toJSString "", toJSInt 1, toJSString "test", toJSInt 2] + xs <- toJSArray $ map toJSInt [1..10] + log_js $ js_index xs (toJSInt 3) + mapM_ log_js =<< fromJSArray an_array -- cgit v1.2.1