vuejs copying data object and removing property will remove the property from original object as well

Question

I have a data object in vue that looks like this

rows[
0 {
  title: "my title",
  post: "my post text",
  public: false,
  info: "some info"
},
1 {
 title: "my title",
  post: "my post text"
  public: true,
  info: "some info"
},
2 {
 title: "my title",
  post: "my post text"
  public: false,
  info: "some info"
}
]

I then copy that object and remove certain properties if needed before posting the object to my backend like this:

var postData = this.rows;
      postData.forEach(function(o) {

        if (o.public === true) {
          delete o.info;
        }
      });

      var uploadData = {};
      uploadData.blogpost = postData;
      axios({
          method: 'post',
          url: myUrl,
          responseType: 'json',
          data: uploadData
        })

The problem is that delete o.info; will also remove the property from my vm root data, and I dont understand why since I created a new varible/copied the root data into that one. So how can I remove certain object properties from my data before posting it without altering my root data vm in vue ?

Answer 1

You need to take a copy of your data by cloning it. There are various ways of cloning the data, I would recommend using lodash's function, cloneDeep

postDataCopy = _.cloneDeep(postData)

Then you can modify postDataCopy as you like without modifying the original.