javascript - How to loop through JSON object with $.each JQuery? - Stack Overflow

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I want to make a live search with JSON data from star wars api. The JSON contain of some objects, and the objects I wanted to fetch is results, which is an array that contains objects that have propertie name,height,mass, ect.

The snippet of the JSON like this:

    {
    "count": 87,
    "next": "/?format=json&page=2",
    "previous": null,
    "results": [
    {
    "name": "Luke Skywalker",
    "height": "172",
    "mass": "77",
    "hair_color": "blond",
    "skin_color": "fair",
    "eye_color": "blue",
    "birth_year": "19BBY",
    "gender": "male",
    "homeworld": "/",
    "films": [
    "/",
    "/",
    "/",
    "/",
    "/"
    ],
    "species": [
    "/"
    ],
    "vehicles": [
    "/",
    "/"
    ],
    "starships": [
    "/",
    "/"
    ],
    "created": "2014-12-09T13:50:51.644000Z",
    "edited": "2014-12-20T21:17:56.891000Z",
    "url": "/"
    }
]
}

I tried with this code but the console says Uncaught TypeError: Cannot read property 'name' of undefined (on line 7)

$('#search').keyup(function() {
    var searchField = $('#search').val();
    var myExp = new RegExp(searchField, "i");
    $.getJSON('/?format=json', function(data) {
        var output = '<ul class="searchresults">';
        $.each(data, function(key, val) {
            if ((val.results.name.search(myExp) != -1) ||
            (val.results.height.search(myExp) != -1)) {
                output += '<li>';
                output += '<h2>'+ val.name +'</h2>';
                output += '<p>'+ val.height +'</p>';
                output += '</li>';
            }
        });
        output += '</ul>';
        $('#update').html(output);
    });
});

I know there's something wrong with my loop, I tried looking for the the answer but I can't get the right answer. Can you please help me?

I want to make a live search with JSON data from star wars api. The JSON contain of some objects, and the objects I wanted to fetch is results, which is an array that contains objects that have propertie name,height,mass, ect.

The snippet of the JSON like this:

    {
    "count": 87,
    "next": "http://swapi.co/api/people/?format=json&page=2",
    "previous": null,
    "results": [
    {
    "name": "Luke Skywalker",
    "height": "172",
    "mass": "77",
    "hair_color": "blond",
    "skin_color": "fair",
    "eye_color": "blue",
    "birth_year": "19BBY",
    "gender": "male",
    "homeworld": "http://swapi.co/api/planets/1/",
    "films": [
    "http://swapi.co/api/films/6/",
    "http://swapi.co/api/films/3/",
    "http://swapi.co/api/films/2/",
    "http://swapi.co/api/films/1/",
    "http://swapi.co/api/films/7/"
    ],
    "species": [
    "http://swapi.co/api/species/1/"
    ],
    "vehicles": [
    "http://swapi.co/api/vehicles/14/",
    "http://swapi.co/api/vehicles/30/"
    ],
    "starships": [
    "http://swapi.co/api/starships/12/",
    "http://swapi.co/api/starships/22/"
    ],
    "created": "2014-12-09T13:50:51.644000Z",
    "edited": "2014-12-20T21:17:56.891000Z",
    "url": "http://swapi.co/api/people/1/"
    }
]
}

I tried with this code but the console says Uncaught TypeError: Cannot read property 'name' of undefined (on line 7)

$('#search').keyup(function() {
    var searchField = $('#search').val();
    var myExp = new RegExp(searchField, "i");
    $.getJSON('http://swapi.co/api/people/?format=json', function(data) {
        var output = '<ul class="searchresults">';
        $.each(data, function(key, val) {
            if ((val.results.name.search(myExp) != -1) ||
            (val.results.height.search(myExp) != -1)) {
                output += '<li>';
                output += '<h2>'+ val.name +'</h2>';
                output += '<p>'+ val.height +'</p>';
                output += '</li>';
            }
        });
        output += '</ul>';
        $('#update').html(output);
    });
});

I know there's something wrong with my loop, I tried looking for the the answer but I can't get the right answer. Can you please help me?

• javascript
• jquery
• json

Share Improve this question Follow asked Jan 16, 2017 at 8:32 bnrflybnrfly 16522 gold badges22 silver badges1212 bronze badges 4

• Val in undefined, thus val.name does not work. Have you verified that the endpoint give you well formatted json? – Automatico Commented Jan 16, 2017 at 8:36
• results is array and not object property you must iterate results to acess name – Akshay Commented Jan 16, 2017 at 8:36
• @Akshaypadwal yeah, I said results is array that contain objects – bnrfly Commented Jan 16, 2017 at 8:40
• then you must iterate as i show below – Akshay Commented Jan 16, 2017 at 8:42

Add a ment  | 

5 Answers 5

Sorted by: Reset to default 3

It's a simple mistake, you should iterate over data.results

$.getJSON('http://swapi.co/api/people/?format=json', function(data) {
    $.each(data.results, function(key, val) { 
    console.log(val.name); 
    })
});

Your JSON contains :

• "count": 87,
• "next": "http://swapi.co/api/people/?format=json&page=2",
• "previous": null,
• "results": The data you want

So you must get results and iterate over it.

You need to iterate over the results of the data object like this:

$.getJSON('http://swapi.co/api/people/?format=json', function(data) {
  $.each(data.results, function(key, value){
    console.log("key", key); 
    console.log("value", value.name)
   })
})

Or in your case:

$('#search').keyup(function() {
    var searchField = $('#search').val();
    var myExp = new RegExp(searchField, "i");
    $.getJSON('http://swapi.co/api/people/?format=json', function(data) {
        var output = '<ul class="searchresults">';
        $.each(data.results, function(key, val) { //Only this line changes.
            if ((val.results.name.search(myExp) != -1) ||
            (val.results.height.search(myExp) != -1)) {
                output += '<li>';
                output += '<h2>'+ val.name +'</h2>';
                output += '<p>'+ val.height +'</p>';
                output += '</li>';
            }
        });
        output += '</ul>';
        $('#update').html(output);
    });
});

I think you should have something like:

output += '<h2>'+ val.results.name +'</h2>';
output += '<p>'+ val.results.height +'</p>';

exactly as you have in your if condition

Make your $.each loop as below:Because val.results is in array format of json.

$.each(data, function(key, val) {
        var results = val.results;
        $.each(results,function(index,value){
            if ((value[index].name.search(myExp) != -1) ||
            (value[index].height.search(myExp) != -1)) {
                output += '<li>';
                output += '<h2>'+ value[index].name +'</h2>';
                output += '<p>'+ value[index].height +'</p>';
                output += '</li>';
            }
        });

        });

Hope it will works correctly.

OR simply

        $.each(data.results,function(index,value){
            if ((value[index].name.search(myExp) != -1) ||
            (value[index].height.search(myExp) != -1)) {
                output += '<li>';
                output += '<h2>'+ value[index].name +'</h2>';
                output += '<p>'+ value[index].height +'</p>';
                output += '</li>';
            }
        });

May be enough for you.

try this

var a = //your json;

$.each(a,function(i,val){
if(val.results.length != 0){
$.each(val.results,function(k,value){
console.log(value.name)})
}
})

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