VueJS does not update DOM after fetch data from API?

Question

I am trying to create an example about the list of photos and I see a trouble when binding data to the component after call API.

JS code:

<script>
// photo item
Vue.component('photo-item', {
   props: ['photo'],
   template: `<li>{{ photo.name }}</li>`
});

// List of photos
Vue.component('photo-list', {
   props: ['photos'],

   template: `
   <ul id="photo-list">
      <photo-item v-for="photo in photos" :photo="photo"></photo-item>
   </ul>`
});

new Vue({
   el: "#photo_detail",
   data: {
      photos: []
   },

   created: function() {
      axios
       .get('/api/photos')
       .then(function (response) {
           this.photos = response.data; // Data existed
       })
       .catch(function (err) {
           console.log(err);
       });
   }
 })
 </script>

HTML code

<main id="photo_detail">
    <photo-list v-for="photo in photos" :photo="photo"></photo-list>
</main>

After fetching all photos from API and as my understand then the variable photos will auto binding and VueJS will update DOM.

VueJs 2.1.6

Any help.

Thanks!

Answer 1

Issue is with your this value inside function() which has this value scoped to axios instead of vue instance . or you can use (response)=> to use this directly

new Vue({
   el: "#photo_detail",
   data: {
      photos: []
   },

   created: function() {
      var self=this;
      axios
       .get('/api/photos')
       .then(function (response) {
           self.photos = response.data; // Data existed
       })
       .catch(function (err) {
           console.log(err);
       });
   }
 })