const HOST = { port:22 } Host.port = 33; console.log( Host ) //{ port: 33}; const HOST1 = { port:80 } Object.freeze(HOST1); HOST1.port = 90; console.log(HOST1) //{ port:80};
Object.freeze() 冻结变量--引用类型
原文：https://www.cnblogs.com/webmc/p/12621187.html
