How to combine to arrays?

Question

I got item a, which is an javascript object I think?

const item = myItem.getAsFile();

which returns something like

lastModified: 1521979332955
name: "image.png"
size: 15254
type: "image/png"
webkitRelativePath: ""

Next I create a object url:

const preview = window.URL.createObjectURL(item);

which returns "blob:https://localhost:3000/..."

Now I want to "push" preview: "blob:https://localhost:3000/..." inside my const item, so that next to lastModified, name, size, etc. preview: will be listed.

How can I do this?

Change const to var or let so you can change item. Then use item.preview = preview to add the attribute to the object. — Tostifrosti
– Tostifrosti, Commented Mar 25, 2018 at 12:11
@Tostifrosti const does not prevent the modification of item. It just disables storing another value in item. — axiac
– axiac, Commented Mar 25, 2018 at 12:13
It is really simple thing, seems it must not be a question. developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/… — Vayrex
– Vayrex, Commented Mar 25, 2018 at 12:13

Marian Rick · Accepted Answer · 2018-03-25 17:09:01Z

2

You can do the following:

item.preview = preview;

if you don't want to change the origin item, you can use Object.assign

let newItem = Object.assign({}, item, {preview: preview})

edited Mar 25, 2018 at 17:09

Marian Rick

3,4655 gold badges35 silver badges69 bronze badges

answered Mar 25, 2018 at 12:12

欧阳维杰

1,8081 gold badge18 silver badges28 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to combine to arrays?

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related