JavaScript - How do I learn about “closures” usage?

Question

From Wikipedia, the free encyclopedia: Closure (computer science)

In computer science, a closure is a function that is evaluated in an

Answer 1

Searching for "javascript closures" gave plenty of encouraging-looking links. The top three were these two (the third link was a reformatted version of the second):

• Javascript closures
• JavaScript closures for dummies

If these didn't help you, please explain why so we're in a better position to actually help. If you didn't search before asking the question, well - please do so next time :)