package.json "module" points to ES6 instead of ESM build

[rodneyrehm]

Do you want to request a feature or report a bug?

bug, but not quite sure

What is the current behavior?

webpack build contains const breaking older browsers

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By default Webpack resolves the "module" property before "main" (resolve.mainFields), meaning that index.js is imported. However it is uncommon to transpile code from node_modules. As far as I understand things the "module" property should point to a file that contains transpiled code exporting its contents in ESM rather than CommonJS. As of v2.4.0 "module" points to raw ES6.

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If I understand this correctly, you're simply missing another build target using format: 'es' in https://github.com/robinvdvleuten/vuex-persistedstate/blob/master/rollup.config.js#L20-L23

[robinvdvleuten]

@rodneyrehm thanks for filing this as an issue! Initially before version v2.4.0, I also pointed to the index.js as source file but wasn't using a const but a var instead. I'll fix it immediately by indeed adding the format: es as additional output.

[robinvdvleuten]

Fixed by #98

[robinvdvleuten]

Your problem should be solved in v2.4.2 👍