class Opal::Nodes::OptargNode


def m(a=1)
optional argument
A node responsible for extracting a single

def compile 

def compile
  optarg_name = @sexp[1].to_sym
  default_value = @sexp[2]
  var_name = variable(optarg_name)
  return if default_value[2] == :undefined
  line "if (#{var_name} == null) {"
  line "  #{var_name} = ", expr(default_value)
  push ";"
  line "}"
end