Error: Uncaught (in promise): process is not defined message

[shinokada]

I just copy and pasted the example in README and this is the REPL link.

As you see in the console, it returns an error and the example tooltip does not hide after on:mouseleave.

[bryanmylee]

Hi @shinokada, thanks for the report. This is a duplicate of #7 and is unfortunately an issue with PopperJS itself.

PopperJS depends on the process global variable, but the Svelte REPL does not define process.

There should be no issues with SvelteKit or Vite as they both handle process properly.

If you're using Rollup, you can resolve this by using rollup-plugin-replace:

npm i -D @rollup/plugin-replace

Add the plugin to your Rollup config:

plugins: [
  replace({ 'process.env.NODE_ENV': JSON.stringify( 'production' ) }),
  // ...other plugins
]