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gleam_javascript

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Work with JavaScript types and values in Gleam, including promises!

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gleam_javascript src gleam javascript.gleam
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src/gleam/javascript.gleam 

// TODO: docs

pub type TypeOf {

  UndefinedType

  ObjectType

  BooleanType

  NumberType

  BigIntType

  StringType

  SymbolType

  FunctionType

}



pub external type Symbol



pub external fn type_of(value) -> TypeOf =

  "../ffi.mjs" "type_of"



pub external fn get_symbol(String) -> Symbol =

  "../ffi.mjs" "get_symbol"



pub external type Reference(value)



pub external fn dereference(Reference(a)) -> a =

  "../ffi.mjs" "dereference"



pub external fn set_reference(Reference(a), a) -> a =

  "../ffi.mjs" "set_reference"



pub external fn make_reference(a) -> Reference(a) =

  "../ffi.mjs" "make_reference"



// returns the old value

pub fn update_reference(ref: Reference(a), f: fn(a) -> a) -> a {

  let value = dereference(ref)

  set_reference(ref, f(value))

  value

}