prevent export merge

[orangebokov]

Good afternoon, i'm asking for a little help.

If i have index.ts like this:

export { Monoid } from 'fp-ts/string'
export function sum(a: number, b: number) {
  return a + b;
}

Then bundle index.esm.js will be something like this:

var Monoid = {
    concat: Semigroup.concat,
    empty: empty
};
function sum(a, b) {
  return a + b;
}
export { Monoid, sum };

How to keep exports individual in bundle like this:

export var Monoid = {
    concat: Semigroup.concat,
    empty: empty
};
export function sum(a, b) {
  return a + b;
}

Thank you very much in advance!

[rschristian]

Sorry, what are you after? The last two code blocks are functionally identical.

[orangebokov]

Thanks for the answer.

Then when you import this library into the main project and build the main project using rollup, tree shaking will not work. Because all functions will be stored in one variable. If they are exported separately, tree shaking will remove the unused ones.

P.S. There will be many functions in this library. many of them will not be used. I wish rollup didn't import them.

[rschristian]

Because all functions will be stored in one variable.

That's not what this is.

export { foo, bar } is exporting a list of values, not merging them. You might want to give MDN a skim and brush up on syntax. This is equivalent to what you want, saves a few bytes is all.

This isn't an issue here. If treeshaking isn't working, it's for other reasons.

[orangebokov]

Thank you for paying attention to this. All the best to you.

[rschristian]

No problem, and if you do find an issue w/ Microbundle's output I'd be happy to reopen this & look at it.