#rollup/plugin-babel cannot convert Spread operator correct when target is 'es5' - babeljs

Question

Rollup Version
rollup 2.78.0
#rollup/plugin-babel 5.3.1
Operating System (or Browser)
macOS 11.6.7
browser: chrome 107.0.5304.87
Node Version
14.18.0
rollup config
const plugins = [
nodeResolve({
preferBuiltins: false,
modulesOnly: true,
extensions: ['js', '.ts'],
}),
commonjs(),
// json(),
// globals(),
// builtins(),
typescript({
target: 'es5',
declaration: true,
declarationDir: 'dist',
}),
babel({
exclude: 'node_modules/**',
babelHelpers: 'runtime', // 开启体积优化
}),
// others
]
questions
I use Spread to convert a Set variable to Array variable, just like this:
const set = new Set();
const getSet = () => {
return [...set]
}
but I found that this function return [] all the time, so I check the build files, and found the Spread API is converted to Array.prototype.slice:
function __spreadArray(to, from, pack) {
if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
if (ar || !(i in from)) {
if (!ar) ar = Array.prototype.slice.call(from, 0, i);
ar[i] = from[i];
}
}
return to.concat(ar || Array.prototype.slice.call(from));
}
However, Array.prototype.slice cannot handle the Set, or in other word, Array.prototype.slice.call(Set) will return [] all the time, and it works if I set the target to es6.
expect
So, my questions is , how can it work when target is 'es5'? I think maybe I need add some configs, but I can't find a solution in document or other article