VM296:1 Uncaught SyntaxError: Unexpected token u in JSON at position 0 at JSON.parse (<anonymous>)

背景

localStorage做数据持久化时，使用 JSON.parse解析一个字符串，作为持久化的默认值，获取默认值报错：

解决

const SERVER_ADDRESS = 'server_address'
// const SERVER_ADDRESS_DEF = '192.168.8.60'
const SERVER_ADDRESS_DEF = '"192.168.8.60"'  //注意单引号里面再加个双引号表示字符串

readServerAddress() {
    
    
    return JSON.parse(localStorage.getItem(SERVER_ADDRESS) || SERVER_ADDRESS_DEF);
},