require() of ES Module mimetext.node.cjs.js not supported in version 3.0.27

[jeremy-brooks]

Updating mimetext from version 3.0.24 to 3.0.27 introduced a breaking change which caused a runtime error.

Error message at runtime:

require() of ES Module /opt/nodejs/node_modules/mimetext/dist/mimetext.node.cjs.js from /###/#####.js not supported.\nmimetext.node.cjs.js is treated as an ES module file as it is a .js file whose nearest parent package.json contains \"type\": \"module\" which declares all .js files in that package scope as ES modules.\nInstead either rename mimetext.node.cjs.js to end in .cjs, change the requiring code to use dynamic import() which is available in all CommonJS modules, or change \"type\": \"module\" to \"type\": \"commonjs\" in /opt/nodejs/node_modules/mimetext/package.json to treat all .js files as CommonJS (using .mjs for all ES modules instead).

Current solution for us was to rollback to version 3.0.24 and stick there for now.

[wiggisser]

I currently work around this issue by doing a dynamic import (as the error suggests), ie I only need the createMimeMessage function to be imported thus I do it as follows

import type { MIMEMessage } from "mimetext";
let createMimeMessage: (() => MIMEMessage) | undefined = undefined;
import("mimetext").then(i => { createMimeMessage = i.createMimeMessage; }).catch(e => { /* do some error handling of your choice here */});

....
function foo() {
  if (!createMimeMessage) throw new Error("oh no ..");
  const msg = createMimeMessage();
} 

I know it's clumsy. But it does the job for now ...