SOURCE

let target = [{"key":"1","workId":"00001","name":"John Brown","department":"New York No. 1 Lake Park","editable":true}];
let targetObj = {"key":"1","workId":"00001","name":"John Brown","department":"New York No. 1 Lake Park","editable":true};
let target1 = {...targetObj};
let target2 = {...target};
console.log(typeof target2);
console.log(JSON.stringify(target2));
console.log(typeof target1);
console.log(JSON.stringify(target1));