modifying data variable in vue.js using axios
Question
Here is my script :
<html>
<script src="https://unpkg.com/vue"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/axios/0.17.0/axios.js"></script>
<body>
<div id="app-3">
<span v-if="seen">{{ textFromApi }}</span>
</div>
<br/>
<script type="text/javascript">
var app3 = new Vue({
el: '#app-3',
data: {
seen: true,
textFromApi: "hello"
},
methods: {
getData() {
return axios.get('https://jsonplaceholder.typicode.com/posts/1')
},
},
created: function () {
this.textFromApi = this.getData();
}
})
</script>
</body>
</html>
I'm trying to modify this.textFromApi from the call of this api: https://jsonplaceholder.typicode.com/posts/1
but my this.textFromApi doesn't seems to update, any ideas why?
Here is a fiddle code: https://jsfiddle.net/bussiere/5t3v013o/
Edited from remark just below
Regards and thanks
1 answers
solution1
1 ACCPTED 2017-10-23 14:53:06
created() is a lifecycle hook , it should be at the same level as data, methods, computed etc. Not a child of methods (so if you nest created() in methods() it will never get executed unless you call the method).
You also don't do anything with the axios promise, you should process it using then () .
<script src="https://unpkg.com/vue"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/axios/0.17.0/axios.js"></script>
<body>
<div id="app-3">
<span v-if="seen">{{ textFromApi }}</span>
</div>
<br/>
<script type="text/javascript">
var app3 = new Vue({
el: '#app-3',
data () {
return {
seen: true,
textFromApi: { title: 'empty'}
}
},
methods: {
getData() {
return axios.get('https://jsonplaceholder.typicode.com/posts/1').then(response => {
this.textFromApi = response.data
})
},
},
created: function () {
this.getData();
}
})
</script>
</body>
</html>
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