javascript - how to get json data using jquery -

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i generating radio button depends on jsondata id , name. below code not working.how resove issue.

json:

{     "a": [             { "id" : "a1", "family" : "family" },             { "id" : "a2", "family" : "family" },             { "id" : "a3", "family" : "family" }         ],     "b": [             { "id" : "b1", "family" : "family" },             { "id" : "b2", "family" : "family" },             { "id" : "b3", "family" : "family" }         ],     "c": [             { "id" : "c1", "family" : "family" },             { "id" : "c2", "family" : "family" },             { "id" : "c3", "family" : "family" }         ] }

javascript:

generatefamily("a");  function generatefamily(objt) {     var objct = objt;     $.getjson("./js/result.json", function(result) {         var testobj = result + "." + objct;         $.each(testobj, function(i, field) {             var char = "a";             char = "ln-" + char;             $("#dfour").append("<li class=" + char + " style='display: list-item;'><a href='#'><span class='m'><input type='radio' class='fbol_ff' value=" + field.id + " family=" + field.family + "/></span>" + field.family + "</a></li>");         });     }); }

you nee read a field json data. since passing a in variable i.e. objt. can fetch using bracket notation

var testobj=result[objt];

instead of

var testobj = result + "." + objct; 

var result = {    "a": [{      "id": "a1",      "family": "family"    }, {      "id": "a2",      "family": "family"    }, {      "id": "a3",      "family": "family"    }],    "b": [{      "id": "b1",      "family": "family"    }, {      "id": "b2",      "family": "family"    }, {      "id": "b3",      "family": "family"    }],    "c": [{      "id": "c1",      "family": "family"    }, {      "id": "c2",      "family": "family"    }, {      "id": "c3",      "family": "family"    }]  };      generatefamily("a");    function generatefamily(objt) {    var testobj = result[objt];    $.each(testobj, function(i, field) {      var char = "a";      char = "ln-" + char;      $("#dfour").append("<li class=" + char + " style='display: list-item;'><a href='#'><span class='m'><input type='radio' class='fbol_ff' value=" + field.id + " family=" + field.family + "/></span>" + field.family + "</a></li>");      });  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <div id='dfour'></div>


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