Are you looking for something like this -
let obj = {to:this.to,all:[]};
let objNew = Object.assign({}, {all: obj.all});
You can achieve by using one of these
let newObj = { all: JSON.stringify(obj.all) };
console.log(newObj);
let newObjJsonString= JSON.stringify({ all: obj.all });
console.log(newObjJsonString);
You delete all other object and return your object with its key.
function getWantedObjectWithKey(obj, key){
var temp = Object.assign({}, obj);
Object.keys(temp).forEach(function(value, index){
if(key != value){
delete temp[key];
}
});
console.log(JSON.stringify(temp));
return JSON.stringify(temp);
}
usage:
getWantedObjectWithKey(obj, 'all');
JSON.stringify({ all: obj.all })?