variable access is a fundamental concept in javascript that determines how and where variables can be accessed and modified within your code. in javascript, variable access is largely governed by...
变量访问是javascript的基本概念，受作用域影响，包括全局作用域、函数作用域和块作用域。var变量因变量提升可在声明前访问，而let和const则不行。闭包使函数能够访问外部作用域的变量。这些概念有助于编写更清晰的代码。
