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What this article shares with you is about what the closures in js are. The editor thinks it is very practical, so I share it with you. I hope you can get something after reading this article. Without saying much, follow the editor to have a look.

In javascript, only subfunctions inside a function can read local variables, so closures can be understood as "functions defined inside a function".

The concept of closure

A closure is a function that can read internal variables of other functions.

Because in the Javascript language, only the subfunctions inside the function can read local variables, the closure can be simply understood as "a function defined inside a function".

So, in essence, a closure is a bridge that connects the inside of a function to the outside of a function.

The purpose of closures

Closures can be used in many places. It has two greatest uses, one is to read variables within the function mentioned earlier, and the other is to keep the values of these variables in memory all the time.

These are the closures in js. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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