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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 type Symbol



@external(javascript, "../ffi.mjs", "type_of")

pub fn type_of(a: value) -> TypeOf



@external(javascript, "../ffi.mjs", "get_symbol")

pub fn get_symbol(a: String) -> Symbol



pub type Reference(value)



@external(javascript, "../ffi.mjs", "dereference")

pub fn dereference(a: Reference(a)) -> a



@external(javascript, "../ffi.mjs", "set_reference")

pub fn set_reference(a: Reference(a), b: a) -> a



@external(javascript, "../ffi.mjs", "make_reference")

pub fn make_reference(a: a) -> Reference(a)



// 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

}