[Vue warn]: Avoid using non-primitive value as key, use string/number value instead.

[keyhoffman]

I am getting the following error: [Vue warn]: Avoid using non-primitive value as key, use string/number value instead.

I think the error is coming from the line: v-for="attachment in tempAttachmentChanged" :key="attachment"

You are using the attachment object as a key. The key needs to be a string/number. Using attachment.name as the key will probably fix this

[keyhoffman]

There are two lines where this is happening in the file handyUploader.vue:

1. 353
2. 414

[alijahanpak]

Thank you @keyhoffman for checking handy-uplader package. I fixed this issue in new release (1.1.0).