Whats the use of vendor folder in drupal 8, what it actually do ?
closed as off-topic by Jdrupal, leymannx, mradcliffe, kiamlaluno♦ Nov 6 at 14:49
This question appears to be off-topic. The users who voted to close gave this specific reason:
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"vendor" is the folder where a Drupal - composer Installation stores it's libraries. If you look at the file web/autoload.php you'll find how that works.
Don't care. It's what's called the "External Libraries" in a java project.