Javascript/vue.js 接收json

Question

我正在尝试在我的 vue.js 应用中接收 json，如下所示：

  new Vue({
            el: 'body',
            data:{
                role: '',
                company: '',
                list:[],
                created: function() {
                  this.getJson();
                },
                methods: {
                    getJson: function(){
                        $.getJSON('http://domain.dev/data',function(task){
                          this.list = task;
                        }.bind(this));
                    }
                }
            }
        });

但结果为空？当我在邮递员中测试这个时，url 返回 json。我在这里做错了什么？

编辑：

JSON（测试数据）：

{"EmployeeId":1,"RoleId":5,"DepartmentId":6,"InternId":1,"FirstName":"Zoe","LastName":"Altenwerth","Bio":"Quidem perferendis.","email":"Kole.Bechtelar@hotmail.com","LinkedIn":"Sterling.Schowalter@example.net","Gender":0,"password":"$2y$10$bbUlDh2060RBRVHSPHoQSu05ykfkw2hGQa8ZO8nmZLFFa3Emy18gK","PlainPassword":"gr^S=Z","remember_token":"D528C0Ba1Xzq3yRV7FdNvDd8SYbrM0gAJdFUcOBq4sNEJdHEOb2xIQ0geVhZ","Address":"0593 Dallin Parkway Apt. 499\nBotsfordborough, MT 12501","Zip":"21503-","City":"East Janiston","ProfilePicture":null,"BirthDate":"2002-10-13 00:00:00","StartDate":"1995-11-09 21:42:22","EndDate":"2011-01-27","Suspended":0,"created_at":"2016-02-29 12:21:42","updated_at":"2016-03-02 11:53:58","deleted_at":null,"role":{"RoleId":5,"RoleName":"Superadministrator","Description":"Mag administrators toevoegen en bewerken","deleted_at":null,"created_at":"-0001-11-30 00:00:00","updated_at":"-0001-11-30 00:00:00"},"department":{"DepartmentId":6,"CompanyId":12,"DepartmentName":"com","Description":"Accusantium quae.","deleted_at":null,"created_at":"2016-02-29 12:21:41","updated_at":"2016-02-29 12:21:41","company":{"CompanyId":12,"CompanyName":"Dare, Bailey and Bednar","Logo":null,"Address":"85762 Tabitha Lights\nWest Jettie, AK 20878-2569","Zip":"29601","City":"Traceside","KvKNumber":"84c70661-9","EcaboNumber":"fdee61e3-a22d-3332-a","deleted_at":null,"created_at":"2016-02-29 12:21:41","updated_at":"2016-02-29 12:21:41"}}}

Answer 1

Vue3 更新

const app = Vue.createApp({
    data: function() {
        return {
            role: '',
            company: '',
            list:[]
        };
    },
    beforeMount: function() {
        this.getJson();
    },
    methods: {
        getJson: function(){
            $.getJSON('http://domain.dev/data',function(task){
                this.list = task;
            }.bind(this));
        }
    }
});

const mountedApp = app.mount('body');

Answer 2

以@vbarbarosh 的回答为基础，但使用浏览器的 fetch api：

a.json:

{"hello": "welcome"}

index.html:

<div id="app">
    <pre>{{ json.hello }}</pre>
</div>

<script type="text/javascript">
new Vue({
    el: '#app',
    data: {
        json: null
    },
    created: function () {
      fetch("/a.json")
        .then(r => r.json())
        .then(json => {
          this.json=json;
        });
    }
});
</script>

Answer 3

这是一个如何将外部 JSON 数据加载到组件中的小示例：

a.json:

{"hello": "welcome"}

index.html:

<div id="app">
    <pre>{{ json.hello }}</pre>
</div>

<script type="text/javascript">
var app = new Vue({
    el: '#app',
    data: {
        json: null
    }
});
$.getJSON('http://localhost/a.json', function (json) {
    app.json = json;
});
</script>

---已编辑---

或者created事件：

<script type="text/javascript">
new Vue({
    el: '#app',
    data: {
        json: null
    },
    created: function () {
        var _this = this;
        $.getJSON('http://localhost/a.json', function (json) {
            _this.json = json;
        });
    }
});
</script>

Answer 4

您也必须将this 绑定到外部函数。

getJson: function () { ...}.bind(this)