"module" field doesn't point at a module

[43081j]

When used as an es module via the "module" property and a bundler, we get no exports.

The sources, and the commonjs output are individual exports, such as:

module.exports.install = fn;
// means:
const {install} = require('@sinonjs/fake-timers');

However, the browserify output results in an empty export:

import {install} from '@sinonjs/fake-timers';  // ERRORS
import * as timers from '@sinonjs/fake-timers'; // this is how it should be but is {} at the minute
import fakeTimers from '@sinonjs/fake-timers'; // ERRORS, no default export
timers.install; // DOESNT EXIST

the problem here seems to be that "module" in package.json should point at an ES module, but clearly doesn't. it instead points at a browserify bundle.. which is rather dated and will not work as expected in bundlers which interpret the "module" field.

[mantoni]

For Sinon we solved this by generating a separate esm module in the build.js script:

https://github.com/sinonjs/sinon/blob/d2b4b726529f167d908747d2173b5491794ac718/build.js#L61-L80

The module field in package.json points to this module. We'd need to the same for fake-timers to fix this.

[stale[bot]]

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