string
表示 string 原始类型可以拥有的最大 length,以 UTF-16 代码单元计算。
length
🌐 Represents the largest length that a string primitive can have, counted in UTF-16 code units.
此值可能取决于正在使用的 JS 引擎。
🌐 This value may depend on the JS engine that is being used.