[JavaScript/Node.JS] How to pass variables to asynchronous callbacks

[JavaScript/Node.JS] How to pass variables to asynchronous callbacks

A link to this has been in my bookmarks for ages, so it’s time to make a post to write this down.

Notice the brackets around the function(url) and })(links[link]) then passes the link to that function.

Check out the [source]/source if my explanation doesn’t make sense. (Please let me know too)

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