Vuejs returns [object Object] from data attribute

Question

I have the following jsfiddle example (check the console) and all you will see is [object Object] instead of person data:

So, basically I have a vuejs instance and a div for v-for to iterate an object

<div id='app'>
  <p v-for="person in people[0]"> 
    <span> {{ person.name }}</span>
        <i class="fa fa-check" 
        v-bind:data-identity="person" 
        @click="addDetail($event)"></i>
  </p>
</div>

The problem is that if I echo {{ person }} I can see a JSON data on the page, but if I try to get it in the function addDetail() with e.target.dataset.identity then all I get is [object Object] and not the json data. I have tried JSON.parse and String methods, non of them work.

Solution 1

v-bind:data-identity="person" coverts person to string hence you can't attach an object to dataset as any object.toString() method returns [Object object] and you are getting the same

try to attach any string like person.name and see if it is reflected in your dataset

https://jsfiddle.net/qthg4Lwm/

hope this will help :)

EDIT: All data attributes are string read this article

from above article

Each property is a string and can be read and written. In the above case setting article.dataset.columns = 5 would change that attribute to "5".

Solution 2

You shouldn't try to access "person" through event and the DOM but give it as parameter to the function addDetail

Template

<div id='app'>
  <p v-for="person in people[0]"> 
    <span> {{ person.name }}</span>
        <i class="fa fa-check" 
        @click="addDetail(person)"></i>
  </p>
</div>

Script

...
methods: {
  addDetail: function(person){
    console.log(person)
  }
}
...

Solution 3

Just passing handler method @click is enough. See Vue reference for event handling

Template:

<i class="fa fa-check" @click="addDetail(person)"></i>

JS:

methods: {
  addDetail: function (person) {
    console.log(person);
  }
}

Comments

[hannes neukermans]

would @click="addDetail(person)" do the trick ?

[Nemani]

does it show [object Object] when you try to log the object?

[hidar]

@Nemani yes, you can see the jsfiddle console I only get [object Object]

[hidar]

@hannesneukermans It does not matter how person is passed, I always get the [object Object] output

[hidar]

It's still the same, no difference from the output I was getting

[hidar]

I don't know why your jsfiddle isn't working. Did you forget to update it? Because I still don't understand

[hidar]

Thanks. But you are still passing person.name if I have to do it your way, I would need many data- attributes. I just want to pass the whole person object in one data attr

[Nemani]

As mentioned in my Answer, you can't pass object to data attribute, data attribute converts any passed value to String

[Nemani]

instead you can pass person object to addDetail function

[Nafiul Islam]

I have edited my answer. By doing this you'll get the person object every time you click on i tag. Please check and let me know