When try to detect file type .md fails, debugging I just see "" as file type, just detect when I drag over a txt extension file as "txt" but .md file type.

const fileTypeIsSupported = file => {
    console.log(file.type);
    return ['text/plain', 'text/markdown'].includes(file.type);
};

...

`markdownView.addEventListener('dragover', (event) => {
const file = getDraggedFile(event);

if (fileTypeIsSupported(file)) {
    markdownView.classList.add('drag-over');
} else {
    markdownView.classList.add('drag-error');
}

});`

electron-rebuild

sh: electron-rebuild: command not found
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn
npm ERR! [email protected] postinstall: `electron-rebuild`
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the [email protected] postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

We should probably add electron-rebuild to the package.json.

If you decided to upgrade electron, you can fix the "require is not defined" issue by adding the webPreferences Object to the BrowserWindow options object and setting nodeIntegration to true and contextIsolation to false:

app.on("ready", () => { mainWindow = new BrowserWindow({ show: false, webPreferences: { nodeIntegration: true, contextIsolation: false, }, });

Refer to the docs for more details.

Thanks to Sathiraumesh for the post.