let jstr='{"name":"张三","age":"18"}'
console.log(jstr)
console.log(typeof jstr)
let jobj=JSON.parse(jstr)
console.log(jobj instanceof Object)
let jstr='{"name":"张三","age":"18"}'
console.log(jstr)
console.log(typeof jstr)
let jobj=JSON.parse(jstr)
console.log(jobj instanceof Object)