检查 javascript object 是否有密钥，如果确实用新密钥替换它

Question

I want to see if my object:

{
application: "123 abc"
description: "done"
id: 672372
issueDate: "2008-07-02T00:00:00"
}

has the key description if it does then replace the key with information . How can I do it?

Answer 1

const obj = {...} // => any object

if(obj.hasOwnProperty('description')) {
  obj.information = obj.description;
  delete obj.description;
}

Answer 2

Simple way:

 var obj = { application: "123 abc", description: "done", id: 672372, issueDate: "2008-07-02T00:00:00" } console.log('before' + obj['application']); if(obj['application']) { obj['application'] = 'new value'; } console.log('after' + obj['application']);

Answer 3

Using the destructuring and renaming the property. This will avoid mutating the current object.

 obj = { application: "123 abc", description: "done", id: 672372, issueDate: "2008-07-02T00:00:00", }; const update = ({ description: information, ...rest }) => Object.assign(rest, information? { information }: {}); console.log(update(obj)); console.log(update({id: 2}));