JS closure implementation count by seconds

Source: Internet
Author: User
Tags closure

JS closure implementation count by seconds

A closure is an expression (usually a function) that has many variables and an environment that binds them, and therefore these variables are also part of the expression. I believe very few people can read this sentence directly, because he describes too academic. In fact, this phrase is in layman's terms: all function in JavaScript is a closure.

Here's a little tip to share, using JavaScript closures to count by seconds, as follows:


1 2 3 4 5 6 7 8 var i = 1; for (i; i<10; i++) {(function (num) {settimeout (function () {console.log (num);}, num*1000);}) (i); }

Focus on the scope of closures.

The above mentioned is the entire content of this article, I hope you can enjoy.

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