A deep clone of js
const deepClone = (data)=>{ let Obj = Array.isArray(data)? []:{} for(let key in data){ if(typeof data[key]==='object'){ Obj[key] = deepClone(data[key]) }else{ Obj[key]= data[key] } } return Obj } let aa = { data:{ name:'song' }, age:18 } let bb = deepClone(aa) console.log(bb) bb.data.name = 'yan' bb.age = 28 console.log(aa) console.log(bb) //{ data: { name: 'song' }, age: 18 } //{ data: { name: 'song' }, age: 18 } //{ data: { name: 'yan' }, age: 28 }