如何從給定的代碼中獲取JSON對象？

Question

我使用的URL我的代碼是：

var url="http://nucleus/api/projectlist?format=json" 
var json=JSON.parse(this.responseText); 

在瀏覽器中的JSON格式的數據就像如下

{ 
    "1": { 
     "id": "91", 
     "title": "Nucleus Aura", 
     "project_locations": "TVm, Kochi", 
     "project_type": "Villa", 
     "project_status": "Book Now", 
     "count_plan": 0, 
     "image": "uploads/project_images/projects_images_image1415954647.png", 
     "imagetitle": "Villa Night" 
    } 
} 

我要打印的JSON數據對象的警告框。

Answer 1

將其指定給var以獲取對象。
如果responseText的是

{ 
    "one": { 
     "id": "91", 
     "title": "Nucleus Aura", 
     "project_locations": "TVm, Kochi", 
     "project_type": "Villa", 
     "project_status": "Book Now", 
     "count_plan": 0, 
     "image": "uploads/project_images/projects_images_image1415954647.png", 
     "imagetitle": "Villa Night" 
    } 
} 

然後，

getJSON(url, function(json){ 
    alert(json);// will give output like [object][Object] 
    alert(json.one.id);// will give output 91 
} 

Answer 2

var getJSON = function(url) { 
    return new Promise(function(resolve, reject) { 
    var xhr = new XMLHttpRequest(); 
    xhr.open('get', url, true); 
    xhr.responseType = 'json'; 
    xhr.onload = function() { 
     var status = xhr.status; 
     if (status == 200) { 
     resolve(xhr.response); 
     } else { 
     reject(status); 
     } 
    }; 
    xhr.send(); 
    }); 
}; 

var url = "http://nucleus/api/projectlist?format=json"; 
getJSON(url).then(function(data) { 
alert('Your Json result is: ' + data.result); //you can comment this, i used it to debug 

    result.innerText = data.result; //display the result in an HTML element 
}, function(status) { //error detection.... 
alert('Something went wrong.'); 
});