def supports_js_dfe(self):
    if (self.is_wasm() or self.is_wasm_backend()):
        return False
    supported_opt_levels = ['-O2', '-O3', '-Oz', '-Os']
    for opt_level in supported_opt_levels:
        if (opt_level in self.emcc_args):
            return True
    return False
def supports_js_dfe(self):
    if (self.is_wasm() or self.is_wasm_backend()):
        return False
    supported_opt_levels = ['-O2', '-O3', '-Oz', '-Os']
    for opt_level in supported_opt_levels:
        if (opt_level in self.emcc_args):
            return True
    return False