Closure advantage of global variables are avoided contamination, the disadvantage is the closure will be permanent memory, the memory usage increases, improper use is likely to cause a memory leak.

闭包的优点是可以避免全局变量的污染，缺点是闭包会常驻内存，会增大内存使用量，使用不当很容易造成内存泄露。

youdao

Closure advantage of global variables are avoided contamination, the disadvantage is the closure will be permanent memory, the memory usage increases, improper use is likely to cause a memory leak.

闭包的优点是可以避免全局变量的污染，缺点是闭包会常驻内存，会增大内存使用量，使用不当很容易造成内存泄露。

youdao